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Articles 331 - 360 of 1147
Full-Text Articles in Engineering
Comparison Of Criteria Used By State Transportation Agencies To Evaluate Proposed Lane Closures In Planned Work Zones, Sudheer Penimicha
Comparison Of Criteria Used By State Transportation Agencies To Evaluate Proposed Lane Closures In Planned Work Zones, Sudheer Penimicha
ETD Archive
The purpose of this thesis was to compare the specific performance measures used by various state transportation agencies across the United States to evaluate the impact of proposed lane closures on the interstate system and decide whether the impact is acceptable or not, and thus whether or not to approve the proposed lane closure. Information about the policies, processes, and procedures for approving lane closures was obtained through a combination of searching the webpages of individual state departments of transportation, downloading pertinent materials, emailing requests for information, and contacting agency personnel by telephone. The collected documents and notes taken during …
Skill Retention For Driving Simulation Experiments, Nikhil Ravindra Sarwate
Skill Retention For Driving Simulation Experiments, Nikhil Ravindra Sarwate
ETD Archive
Whether driving a car in the real world or a simulator vehicle in a computer generated world, the procedural aspects of driving are very similar. The steering wheel is used to control the direction of the vehicle while the accelerator and brake pedals are used to control the speed. This similarity means that people who already possess the skill of driving in the real world are expected to transfer those existing skills to drive a simulator vehicle. Recognizing the need for skill transference, the typical protocol for conducting driving simulation experiments includes a practice drive, which affords participants the opportunity …
Dynamic Model Of A Non-Linear Pneumatic Pressure Modulating Valve Using Bond Graphs, Christopher L. Brubaker
Dynamic Model Of A Non-Linear Pneumatic Pressure Modulating Valve Using Bond Graphs, Christopher L. Brubaker
ETD Archive
This research develops a mathematical model of the dynamic pressure response to a variable travel input of a pneumatic pressure modulating valve intended for use in a vehicle air brake system. Generically, the valve is a multi-domain system consisting of a mechanical portion and a pneumatic portion. Included in the mechanical portion of the model are compliance of the springs, inertia of the components, and resistance of the sliding components. The pneumatic portion of the model includes capacitance due to the compressibility of the gas, flow resistance through connected plumbing, and flow resistance through the valve control orifices. The development …
Optimal Design And Control Of A Lower-Limb Prosthesis With Energy Regeneration, Holly E. Warner
Optimal Design And Control Of A Lower-Limb Prosthesis With Energy Regeneration, Holly E. Warner
ETD Archive
The majority of amputations are of the lower limbs. This correlates to a particular need for lower-limb prostheses. Many common prosthesis designs are passive in nature, making them inefficient compared to the natural body. Recently as technology has progressed, interest in powered prostheses has expanded, seeking improved kinematics and kinetics for amputees. The current state of this art is described in this thesis, noting that most powered prosthesis designs do not consider integrating the knee and the ankle or energy exchange between these two joints. An energy regenerative, motorized prosthesis is proposed here to address this gap. After preliminary data …
A Generalized Control Method For Constant Switching Frequency Three Phase Pwm Boost Rectifier Under Extreme Unbalanced Operation Condition, Abhishek Kumar Upadhyay
A Generalized Control Method For Constant Switching Frequency Three Phase Pwm Boost Rectifier Under Extreme Unbalanced Operation Condition, Abhishek Kumar Upadhyay
ETD Archive
This thesis presents a generalized control method for constant switching frequency PWM Boost Type Rectifier under extremely unbalanced operating conditions in the power system. The proposed analytical method is verified by using MATLAB/ Simulink model developed under severe unbalanced conditions of input source voltages and input impedances. The closed loop control method for controlling the output DC voltage is also presented and verified by using MATLAB/Simulink model. An experimental model is built to prove the feasibility of the proposed constant switching frequency operation of the PWM Boost Type Rectifier under extreme unbalanced operation conditions by using DSPACE RT1104 digital control …
High Speed Clock Glitching, Santosh Desiraju
High Speed Clock Glitching, Santosh Desiraju
ETD Archive
In recent times, hardware security has drawn a lot of interest in the research community. With physical proximity to the target devices, various fault injection hardware attack methods have been proposed and tested to alter their functionality and trigger behavior not intended by the design. There are various types of faults that can be injected depending on the parameters being used and the level at which the device is tampered with. The literature describes various fault models to inject faults in clock of the target but there are no publications on overclocking circuits for fault injection. The proposed method bridges …
The Design And Implementation Of A Kinect-Based Rehabilitation Exercise Monitoring And Guidance System, Hai Feng
ETD Archive
In preventive and rehabilitative healthcare, physical exercise is a powerful intervention. However, a program may require in the range of thousands of practice repetitions, and many people do not adhere to the program or perform their home exercises incorrectly, making the exercise ineffective, or even dangerous. This thesis research aims to develop a Kinect-based system for rehabilitation exercises monitoring and guidance. In the first step, a feasibility study was carried out on using Kinect for realtime monitoring of rehabilitation exercises while a multi-camera motion tracking system was used to establish the ground truth. In the second step, a Unity-based system …
Analysis Of Smartphone Traffic, Nicholas Luke Ruffing
Analysis Of Smartphone Traffic, Nicholas Luke Ruffing
ETD Archive
Smartphone reconnaissance, the first step to launch security attacks on a target smartphone, enables an adversary to tailor attacks by exploiting the known vulnerabilities of the target system. We investigate smartphone OS identification with encrypted traffic in this paper. Four identification algorithms based on the spectralanalysis of the encrypted traffic are proposed. The identification algorithms are designed for high identification accuracy by removing noise frequency components and for high efficiency in terms of computation complexity. We evaluate the identification algorithms with smartphone traffic collected over three months. The experimental results show that the algorithms can identify the smartphone OS accurately. …
High Surface Area And Z′ In A Thermally Stable 8-Fold Polycatenated Hydrogen-Bonded Framework, Cassandra A. Zentner, Holden W.H. Lai, Joshua T. Greenfield, Ren A. Wiscons, Matthias Zeller, Charles F. Campana, Orhan Talu, Stephen A. Fitzgerald, Jesse L.C. Rowsell
High Surface Area And Z′ In A Thermally Stable 8-Fold Polycatenated Hydrogen-Bonded Framework, Cassandra A. Zentner, Holden W.H. Lai, Joshua T. Greenfield, Ren A. Wiscons, Matthias Zeller, Charles F. Campana, Orhan Talu, Stephen A. Fitzgerald, Jesse L.C. Rowsell
Chemical & Biomedical Engineering Faculty Publications
1,3,5-Tris(4-carboxyphenyl)benzene assembles into an intricate 8-fold polycatenated assembly of (6,3) hexagonal nets formed through hydrogen bonds and π-stacking. One polymorph features 56 independent molecules in the asymmetric unit, the largest Z′ reported to date. The framework is permanently porous, with a BET surface area of 1095 m2 g−1 and readily adsorbs N2, H2 and CO2.
Selective Plane Illumination Microscopy, David Ian Pendleton
Selective Plane Illumination Microscopy, David Ian Pendleton
Undergraduate Research Posters 2015
Selective plane illumination microscopy (SPIM), or light sheet microscopy, is a microscopy technique that allows you to acquire high resolution fluorescence images of biological samples by illuminating the sample with a thin plane from the side, instead of along the imaging axis as in traditional transillumination or epi-illumination. The purpose of this SPIM research assignment was to combine two previously built systems, an inverted SPIM and a tunable lens system. This report includes use of optics, coupling lasers and proper technique to building optical systems. Programming in Matlab, LabVIEW, and other programming languages was used to synchronize the shutter and …
Interactive Markov Models Of Evolutionary Algorithms, Haiping Ma, Daniel J. Simon, Minrui Fei, Hongwei Mo
Interactive Markov Models Of Evolutionary Algorithms, Haiping Ma, Daniel J. Simon, Minrui Fei, Hongwei Mo
Electrical and Computer Engineering Faculty Publications
This paper introduces a Markov model for evolutionary algorithms (EAs) that is based on interactions among individuals in the population. This interactive Markov model has the potential to provide tractable models for optimization problems of realistic size. We propose two simple discrete optimization search strategies with population-proportion-based selection and a modified mutation operator. The probability of selection is linearly proportional to the number of individuals at each point of the search space. The mutation operator randomly modifies an entire individual rather than a single decision variable. We exactly model these optimization search strategies with interactive Markov models. We present simulation …
Substrate Concentration Influences Effective Radial Diffusion Coefficient In Canine Cortical Bone, Kurt Farrell, Daniel O’Conor, Mariela Gonzalez, Caroline Androjna, Ronald J. Midura, Surendra N. Tewari, Joanne M. Belovich
Substrate Concentration Influences Effective Radial Diffusion Coefficient In Canine Cortical Bone, Kurt Farrell, Daniel O’Conor, Mariela Gonzalez, Caroline Androjna, Ronald J. Midura, Surendra N. Tewari, Joanne M. Belovich
Chemical & Biomedical Engineering Faculty Publications
Transport of nutrients and waste across osseous tissue is dependent on the dynamic micro and macrostructure of the tissue; however little quantitative data exists examining how this transport occurs across the entire tissue. Here we investigate in vitro radial diffusion across a section of canine tissue, at dimensions of several hundred microns to millimeters, specifically between several osteons connected through a porous microstructure of Volkmann's canals and canaliculi. The effective diffusion coefficient is measured by a "sample immersion" technique presented here, in which the tissue sample was immersed in solution for 18-30 h, image analysis software was used to quantify …
Modeling And Parameter Estimation Of An Actuator For Prosthetic Joints, Bartholomew J. Brown, Katherine Florek, Hanz Richter
Modeling And Parameter Estimation Of An Actuator For Prosthetic Joints, Bartholomew J. Brown, Katherine Florek, Hanz Richter
Undergraduate Research Posters 2014
A mathematical model was developed for a linear actuator to be used in a powered leg prosthesis. The model consists of a differential equation relating motor voltage, external force and velocity. All model parameters were known from manufacturer's data, except inertia and friction. A numerical simulation was prepared to estimate these parameters from experimental data. Experiments were conducted and a numerical search was performed to arrive at parameter values that closely fit the data. The mathematical model will be used in subsequent control development work.
An Autonomous Robotic Indoor Environment Surveillance System, Andrew Gunnerson, Bogdan Olar, Haodong Wang
An Autonomous Robotic Indoor Environment Surveillance System, Andrew Gunnerson, Bogdan Olar, Haodong Wang
Undergraduate Research Posters 2014
We developed an autonomous mobile robot platform capable of following a path and gather environmental data, including temperature, humidity, light intensity, etc. The robot is capable of detecting the path using its camera and correct most navigational errors, while the sensors support a limited set of instructions regarding which sensor data to collect and how often. Our experiment consisted of having the robot follow a looped path we set up in BU004 Lab. The robot was able to complete the loop and gather sensor data for light intensity, humidity and temperature at a frequency of once per second, and also …
Controlling Micelle Formation Using Mixtures Of Linear And Foldon-Capped Polypeptides (Elp): Measurements With Uv-Vis Spectroscopy, John P. Gavin, Michael G. Price, Janna Mino, Nolan Holland, Kiril Streletzky
Controlling Micelle Formation Using Mixtures Of Linear And Foldon-Capped Polypeptides (Elp): Measurements With Uv-Vis Spectroscopy, John P. Gavin, Michael G. Price, Janna Mino, Nolan Holland, Kiril Streletzky
Undergraduate Research Posters 2014
Polymer surfactants developed in our lab have a protein headgroup (foldon) and three elastin-like polypeptide (ELP) tails. They can form micelles smaller than 30 nm, which may be useful in developing targeted drug delivery vehicles. Specifically, ELPs are capped with foldon, which is a 27 amino acid sequence that folds as a homotrimer, resulting in a three-armed star polypeptide. This structure has been shown to form micelles above the transition temperature (Tt) of the ELP. The salt concentration affects the interaction between the headgroups affecting how the micelles assemble. At low salt concentrations the ELP-foldon will form spherical micelles; whereas, …
Live Cell Imaging Of Bone Marrow Stromal Cells On Nano-Pitted And Polished Titanium Surfaces: A Micro-Incubator In Vitro Approach, Zakaria Benmerzouga, Surendra Tewari, Joanne Belovich
Live Cell Imaging Of Bone Marrow Stromal Cells On Nano-Pitted And Polished Titanium Surfaces: A Micro-Incubator In Vitro Approach, Zakaria Benmerzouga, Surendra Tewari, Joanne Belovich
Undergraduate Research Posters 2014
Current orthopedic implants are not conducive for optimal integration of the biomaterial with newly-formed tissue (osseointegration) inside a patient’s body. In this study, medical-rade Ti-6Al-4V was used as a substrate due to its biocompatibility and ability to facilitate cellular adhesion and proliferation. Live cell imaging was conducted on bone marrow stromal cells, genetically modified to express the green fluorescent protein (GFP), from the 24-96 hours growth period, with the first 24 hours of growth being held inside a lab-scale incubator. Periodic images were recorded on nanopitted anodized and polished Ti-6Al-4V substrates to study how substratestiffness influences adhesion and proliferation. Collected …
Electronic Control Optimization Of A Regenerative Leg Prosthesis, Taylor Barto, Dan Simon
Electronic Control Optimization Of A Regenerative Leg Prosthesis, Taylor Barto, Dan Simon
Undergraduate Research Posters 2014
Until recently, leg prostheses (artificial legs) operated similarly to a leg without muscles. With recent advances in electronic technology, motorized prostheses have become possible. However, these prostheses require large batteries and have a limited operation time. Our research focuses on using supercapacitors in prostheses to exploit the braking portion of human walking to regenerate energy, thus reducing the dependence on batteries. To use supercapacitors with the knee motor, electronic control circuitry is required. We are using a circuit that is similar to a standard motor controller to manage the flow of energy between the supercapacitor and the knee motor. This …
Computer Vision And Route Planning For Humanoid Robots, Michael Iannicca, Dawei Du, Dan Simon
Computer Vision And Route Planning For Humanoid Robots, Michael Iannicca, Dawei Du, Dan Simon
Undergraduate Research Posters 2014
Our research focuses on vision-based route planning for the NAO humanoid robot. The robot is required to visually observe a scene and decide the shortest possible route for visiting the points of interest in that scene. A robust method for processing image information is used to determine the locations to be visited. We use a perspective projection algorithm to map points from a camera image to locations in three-dimensional space. A camera calibration algorithm finds the distance from the camera to the image plane. Linear regression is used to obtain the equations of camera calibration lines. Thresholds and binary masks …
3d Cultures Of Human Liver Cell Lines Encapsulated In Puramatrix On A Microarray Chip Platform, Pratap Lama, Alexander D. Roth, Pranav Joshi, Akshata Datar, Moo-Yeal Lee
3d Cultures Of Human Liver Cell Lines Encapsulated In Puramatrix On A Microarray Chip Platform, Pratap Lama, Alexander D. Roth, Pranav Joshi, Akshata Datar, Moo-Yeal Lee
Undergraduate Research Posters 2014
A high-throughput cell printing technology has developed to simulate the liver tissue environment using a hydrogel-based chip platform that has potential to shift in vivo drug toxicity models towards in vitro tests. However, the hydrophobic nature of polystyrene chips is not promoting direct adhesion of hydrogels, which created a problem with spot attachment. The main goal of this research is to create a surface chemistry that helps to attach a peptide-based hydrogel, including PuraMatrix, to a polystyrenebased micropillar chip. Seven analogs of maleic anhydride co-polymers were used to coat the micropillar chip to create a functional surface. Then, six ionic …
High-Content, 3d Cell Culture Assays On A Micropillar/Microwell Chip Platform, Pranav Joshi, Akshata Datar, Alexander D. Roth, Pratap Lama, Moo-Yeal Lee
High-Content, 3d Cell Culture Assays On A Micropillar/Microwell Chip Platform, Pranav Joshi, Akshata Datar, Alexander D. Roth, Pratap Lama, Moo-Yeal Lee
Undergraduate Research Posters 2014
High content imaging (HCI) is a multi-parametric assay using multiple fluorescent dyes that are relevant to specific cell functions. The HCI assays provide an insight into the mechanisms of toxic drug responses, thus enhancing predictability of drug toxicity. However, current HCI assays are performed on 2D cell monolayer cultures which are physiologically irrelevant, creating a new opportunity for better predictable 3D HCI assays. The goal of this research is to develop HCI assays on 3D cellular microarrays that can be implemented for various toxicity screening, leading to classification of drug toxicity via investigating profiles of cell injury. As a model …
Anatomy-Based Transmission Factors For Technique Optimization In Portable Chest X-Ray, Chris L. Liptak, W. Paul Segars, Ashraf G. Morgan, Frank F. Dong, Xiang Li
Anatomy-Based Transmission Factors For Technique Optimization In Portable Chest X-Ray, Chris L. Liptak, W. Paul Segars, Ashraf G. Morgan, Frank F. Dong, Xiang Li
Undergraduate Research Posters 2014
Currently, portable x-ray examinations do not employ automatic exposure control (AEC). To aid in the design of a size-specific technique chart, acrylic slabs of various thicknesses are often used to estimate x-ray transmission factors for patients of various body thicknesses. This approach, while simple, does not account for patient anatomy, tissue heterogeneity, and the attenuation properties of the human body. To better account for these factors, in this work, we determined x-ray transmission factors using computational patient models that are anatomically realistic. A Monte Carlo program was developed to model a portable x-ray system. Detailed modeling was done of the …
Monitoring Micelle Formation In Mixtures Of Linear And Foldon-Capped Polypeptides With Light Scattering Spectroscopy, Janna Mino, John P. Gavin, Michael G. Price, Kiril Streletzky, Nolan Holland
Monitoring Micelle Formation In Mixtures Of Linear And Foldon-Capped Polypeptides With Light Scattering Spectroscopy, Janna Mino, John P. Gavin, Michael G. Price, Kiril Streletzky, Nolan Holland
Undergraduate Research Posters 2014
Elastin-like polypeptide (ELP) polymers are ideal for producing environmentally responsive micellar systems because they exhibit a transition from being water-soluble at low temperatures to phase-separated at high temperatures. For application development of drug delivery vehicles and biosensing nanoparticles, it is important to prepare spherical micelles of controlled diameter and shape. Since at a given salt concentration, the headgroup area for each foldon should be constant, the size of the micelles is expected to be proportional to the volume of the linear ELP available per foldon headgroup. Therefore, adding linear ELPs to a system of ELP-foldon should result in changes of …
Reaction Engineering Routes To Waste Gasification For Sustainable Living Environments, Stephen A. Reeves, Mohammed S. Suleiman, Joshua M. Cmar, Jorge E. Gatica
Reaction Engineering Routes To Waste Gasification For Sustainable Living Environments, Stephen A. Reeves, Mohammed S. Suleiman, Joshua M. Cmar, Jorge E. Gatica
Undergraduate Research Posters 2014
There is an increasing pressure to reduce waste generation and dependence upon fossil fuels in our society. The approach investigated in this project aims to address both concerns by formulating a low-temperature gasification process to process long-chain polymers typically found in municipal waste. Gasification routes which convert plastic and bio-waste into useful fuel syngas products has been extensively investigated. The novelty of the approach examined here consists on the use of a variety of catalysts, which can promote high conversion in gasification reactions at much lower temperature and pressure conditions. This route overcomes some of the financial and environmental shortcomings …
Analysis Of Smartphone Traffic, Nick Ruffing, Ye Zhu
Analysis Of Smartphone Traffic, Nick Ruffing, Ye Zhu
Undergraduate Research Posters 2014
Smartphones have become the central communication and computing devices in our daily life because of their nearly ubiquitous Internet access through various communication capabilities such as WiFi, 3G, or even 4G networks, their user-friendly interfaces supporting touch and gesture based input, and their numerous applications and games. Operating system (OS) detection, the first step to launch security attacks on a target smartphone, enables an adversary to tailor attacks by exploiting the known vulnerabilities of the target system. We investigate OS identification against smartphones that use encrypted traffic. We evaluate the identification algorithms against collected smartphone traffic. The experiments results show …
Comparison Of Electronic And Mechanical Handgrip Devices In Lowering Blood Pressure, Katie Webb, Brandon Musarra, Megan O’Keefe, Shana Strunk, Courtney Perkins, Kenneth E. Sparks, Emily Kullman, Eddie T.C. Lam
Comparison Of Electronic And Mechanical Handgrip Devices In Lowering Blood Pressure, Katie Webb, Brandon Musarra, Megan O’Keefe, Shana Strunk, Courtney Perkins, Kenneth E. Sparks, Emily Kullman, Eddie T.C. Lam
Undergraduate Research Posters 2014
Hypertension causes billions of deaths per year (Millar et al., 2013). The Zona PlusTM is an expensive tool designed to lower blood pressure (BP) using isometric exercise. This exercise may be achieved using a less expensive Handgrip Dynamometer. PURPOSE: The purpose of this research is to determine if the Zona or Handgrip Dynamometer is more efficient at lowering BP and most cost effective for patients. METHODS: Twenty subjects used the Zona and twenty subjects used the dynamometer three times per week for six weeks. BP was taken once per week prior to the treatment. A maximum voluntary contraction (MVC) was …
Adaptive Control Of An Active Magnetic Bearing With External Disturbance, Lili Dong, Silu You
Adaptive Control Of An Active Magnetic Bearing With External Disturbance, Lili Dong, Silu You
Electrical and Computer Engineering Faculty Publications
Adaptive back stepping control (ABC) is originally applied to a linearized model of an active magnetic bearing (AMB) system. Our control goal is to regulate the deviation of the magnetic bearing from its equilibrium position in the presence of an external disturbance and system uncertainties. Two types of ABC methods are developed on the AMB system. One is based on full state feedback, for which displacement, velocity, and current states are assumed available. The other one is adaptive observer based back stepping controller (AOBC) where only displacement output is measurable. An observer is designed for AOBC to estimate velocity and …
Modified Active Disturbance Rejection Control For Time-Delay Systems, Shen Zhao, Zhiqiang Gao
Modified Active Disturbance Rejection Control For Time-Delay Systems, Shen Zhao, Zhiqiang Gao
Electrical and Computer Engineering Faculty Publications
Industrial processes are typically nonlinear, time-varying and uncertain, to which active disturbance rejection control (ADRC) has been shown to be an effective solution. The control design becomes even more challenging in the presence of time delay. In this paper, a novel modification of ADRC is proposed so that good disturbance rejection is achieved while maintaining system stability. The proposed design is shown to be more effective than the standard ADRC design for time-delay systems and is also a unified solution for stable, critical stable and unstable systems with time delay. Simulation and test results show the effectiveness and practicality of …
Real-Time Simulation Of Three-Dimensional Shoulder Girdle And Arm Dynamics, Edward K. Chadwick, Dimitra Blana, Robert F. Kirsch, Antonie J. Van Den Bogert
Real-Time Simulation Of Three-Dimensional Shoulder Girdle And Arm Dynamics, Edward K. Chadwick, Dimitra Blana, Robert F. Kirsch, Antonie J. Van Den Bogert
Antonie J. van den Bogert
Electrical stimulation is a promising technology for the restoration of arm function in paralyzed individuals. Control of the paralyzed arm under electrical stimulation, however, is a challenging problem that requires advanced controllers and command interfaces for the user. A real-time model describing the complex dynamics of the arm would allow user-in-the-loop type experiments where the command interface and controller could be assessed. Real-time models of the arm previously described have not included the ability to model the independently controlled scapula and clavicle, limiting their utility for clinical applications of this nature. The goal of this study therefore was to evaluate …
Real-Time Simulation Of Three-Dimensional Shoulder Girdle And Arm Dynamics, Edward K. Chadwick, Dimitra Blana, Robert F. Kirsch, Antonie J. Van Den Bogert
Real-Time Simulation Of Three-Dimensional Shoulder Girdle And Arm Dynamics, Edward K. Chadwick, Dimitra Blana, Robert F. Kirsch, Antonie J. Van Den Bogert
Mechanical Engineering Faculty Publications
Electrical stimulation is a promising technology for the restoration of arm function in paralyzed individuals. Control of the paralyzed arm under electrical stimulation, however, is a challenging problem that requires advanced controllers and command interfaces for the user. A real-time model describing the complex dynamics of the arm would allow user-in-the-loop type experiments where the command interface and controller could be assessed. Real-time models of the arm previously described have not included the ability tomodel the independently controlled scapula and clavicle, limiting their utility for clinical applications of this nature. The goal of this study therefore was to evaluate the …
Numerical Evaluation Of Paris-Regime Crack Growth Rate Based On Plastically Dissipated Energy, Parag G. Nittur, Anette M. Karlsson, Leif A. Carlsson
Numerical Evaluation Of Paris-Regime Crack Growth Rate Based On Plastically Dissipated Energy, Parag G. Nittur, Anette M. Karlsson, Leif A. Carlsson
Mechanical Engineering Faculty Publications
The crack growth rate during cyclic loading is investigated via numerical simulations. The crack advancement is governed by a propagation criterion that relates the increment in plastically dissipated energy ahead of the crack tip to a critical value. Once this critical value is satisfied, crack propagation is modeled via a node release scheme. Thus, the crack growth rate is an output from the numerical simulation. The crack growth rate predicted by the proposed scheme is compared with published experimental crack growth data in the Paris-regime for selected metals. A good match is found between the experimentally observed crack growth rates …