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Articles 1 - 30 of 96
Full-Text Articles in Mechanical Engineering
Selective Resistive Sintering: A Novel Additive Manufacturing Process, Austin Bryan Van Horn
Selective Resistive Sintering: A Novel Additive Manufacturing Process, Austin Bryan Van Horn
Graduate Theses and Dissertations
Selective laser sintering (SLS) is one of the most popular 3D printing methods that uses a laser to pattern energy and selectively sinter powder particles to build 3D geometries. However, this printing method is plagued by slow printing speeds, high power consumption, difficulty to scale, and high overhead expense. In this research, a new 3D printing method is proposed to overcome these limitations of SLS. Instead of using a laser to pattern energy, this new method, termed selective resistive sintering (SRS), uses an array of microheaters to pattern heat for selectively sintering materials. Using microheaters offers significant power savings, significantly …
Solar Car Suspension System, Alex Power, Adam O'Camb
Solar Car Suspension System, Alex Power, Adam O'Camb
Mechanical Engineering
No abstract provided.
3-Axis Automated Probe Traverse For Aerodynamic Testing, Tananant Boonya-Ananta, Ricky Wai, Zander Oostman, Teyvon Brooks
3-Axis Automated Probe Traverse For Aerodynamic Testing, Tananant Boonya-Ananta, Ricky Wai, Zander Oostman, Teyvon Brooks
Mechanical Engineering
Our primary objective is to design, build, and test an automated traverse to hold measurement probes in Cal Poly’s low speed wind tunnel. The device should cause minimal flow disturbance. It’s movements must be able to cover eighty percent of the three-dimensional test section. The device should have a mounting point for interchangeable probes. The assembly is to be integrated with the current frame structure on the wind tunnel test section, and should allow very minimal deflection of the measurement probe. The user should be able to control the motion of the traverse via a computer interface which supports automatic …
Dynamic Monitoring And Life Prediction Of Internal Strain-Gage Balances, David Leon Yoder
Dynamic Monitoring And Life Prediction Of Internal Strain-Gage Balances, David Leon Yoder
Masters Theses
Wind tunnel test customers continue to push the limits by producing air vehicle designs that produce high aerodynamic loads at the desired test conditions. These loads are a combination of steady aerodynamic, unsteady aerodynamic, and inertial forces. A methodology to monitor the health of a wind tunnel strain-gage balance has been developed. The objective of this methodology is to define the stress limits of the balance and monitor these limits so the balance can be safely tested without failure of the balance. A balance failure could result in costly damage to the wind tunnel model, support system, and the wind …
Reduced Order Fluid-Structure Interaction Models For Thin Shells With Non-Zero Gaussian Curvatures To Understand The Response Of Aneurysms To Flow, Gary Han Chang
Doctoral Dissertations
In this thesis, a reduced-order model is constructed to study the physiological flow and wall shear stress conditions for aneurysms. The method of local proper orthogonal decomposition (POD) is used to construct the reduced-order modes using a series of CFD results, which are subsequently improved using a QR-factorization technique to satisfy the various boundary conditions in physiological flow problems. This method can effectively construct a computationally efficient physiological model, which allows us to examine the fluid velocities and wall shear stress distributions over a range of different physiological flow parameters. Aneurysms are the dilation, bulging, or ballooning-out of part of …
Eulerian Cfd Modeling Of Multiphase Internal Injector Flow And External Sprays, Eli T. Baldwin
Eulerian Cfd Modeling Of Multiphase Internal Injector Flow And External Sprays, Eli T. Baldwin
Doctoral Dissertations
The improvement of combustion systems which use sprays to atomize liquid fuel requires an understanding of that atomization process. Although the secondary break up mechanisms for the far-field of an atomizing spray have been thoroughly studied and well understood for some time, understanding the internal nozzle flow and primary atomization on which the far-field spray depends has proven to be more of a challenge. Flow through fuel injector nozzles can be highly complex and heavily influenced by factors such as turbulence, needle motion, nozzle imperfections, nozzle asymmetry, and phase change. All of this occurs within metallic injectors, making experimental characterization …
Numerical Simulation Of High Velocity Impact Of A Single Polymer Particle During Cold Spray Deposition, Sagar P. Shah
Numerical Simulation Of High Velocity Impact Of A Single Polymer Particle During Cold Spray Deposition, Sagar P. Shah
Masters Theses
Abstract
The cold spray process is an additive manufacturing technology primarily suited for ductile metals, and mainly utilized in coating surfaces, manufacturing of freeform parts and repair of damaged components. The process involves acceleration of solid micro-particles in a supersonic gas flow and coating build-up by bonding upon high velocity impact onto a substrate. Coating deposition relies on the kinetic energy of the particles. The main objective of this study was to investigate the mechanics of polymer cold spray process and deformation behavior of polymers to improve technological implementation of the process.
A finite element model was created to simulate …
Intent Recognition Of Rotation Versus Translation Movements In Human-Robot Collaborative Manipulation Tasks, Vinh Q. Nguyen
Intent Recognition Of Rotation Versus Translation Movements In Human-Robot Collaborative Manipulation Tasks, Vinh Q. Nguyen
Masters Theses
The goal of this thesis is to enable a robot to actively collaborate with a person to move an object in an efficient, smooth and robust manner. For a robot to actively assist a person it is key that the robot recognizes the actions or phases of a collaborative tasks. This requires the robot to have the ability to estimate a person’s movement intent. A hurdle in collaboratively moving an object is determining whether the partner is trying to rotate or translate the object (the rotation versus translation problem). In this thesis, Hidden Markov Models (HMM) are used to recognize …
Intrusion Detection In Aerial Imagery For Protecting Pipeline Infrastructure, Paheding Sidike, Almabrok Essa, Vijayan K. Asari
Intrusion Detection In Aerial Imagery For Protecting Pipeline Infrastructure, Paheding Sidike, Almabrok Essa, Vijayan K. Asari
Vijayan K. Asari
We present an automated mechanism that can detect and issue warnings of machinery threat such as the presence of construction vehicles on pipeline right-of-way. The proposed scheme models the human visual perception concepts to extract fine details of objects by utilizing the corners and gradient histogram information in pyramid levels. Two real-world aerial image datasets are used for testing and evaluation.
Novel Closed-Loop Control Strategy For Inkjet-Based Additive Manufacturing System, Yunong Shi, Chunsheng Ye
Novel Closed-Loop Control Strategy For Inkjet-Based Additive Manufacturing System, Yunong Shi, Chunsheng Ye
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Study On Criterion Of Fabricating Columnar Dendrite Structure Dz466 Superalloy Based On Lmc Process, Xun Sun
Study On Criterion Of Fabricating Columnar Dendrite Structure Dz466 Superalloy Based On Lmc Process, Xun Sun
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes, Olga Tulupova
Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes, Olga Tulupova
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Study On Criterion Of Fabricating Columnar Dendrite Structure Dz466 Superalloy Based On Lmc Process, Xun Sun, Guoyan Shui, Yang Guan, Guiqiao Su, Bo Yu, Lou Yanchun
Study On Criterion Of Fabricating Columnar Dendrite Structure Dz466 Superalloy Based On Lmc Process, Xun Sun, Guoyan Shui, Yang Guan, Guiqiao Su, Bo Yu, Lou Yanchun
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Simulation Investigation Of Temperature Distribution In Large Aluminium Panel During Autoclave Age Forming Process, Yongqian Xu
Simulation Investigation Of Temperature Distribution In Large Aluminium Panel During Autoclave Age Forming Process, Yongqian Xu
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Steady-State Simulation And Die Improvement On The Extrusion Of Magnesium Square Tube With Thin Wall, Tao Lin, Yun-Teng Liu, Yuan-Sheng Yang, Ji-Xue Zhou
Steady-State Simulation And Die Improvement On The Extrusion Of Magnesium Square Tube With Thin Wall, Tao Lin, Yun-Teng Liu, Yuan-Sheng Yang, Ji-Xue Zhou
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Simulation Of Two Kinds Of Hot Stamping Processes Of Ultra High-Strength Steel, Hao Zhao, Zhongwen Xing, Hongliang Yang
Simulation Of Two Kinds Of Hot Stamping Processes Of Ultra High-Strength Steel, Hao Zhao, Zhongwen Xing, Hongliang Yang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Void Closure And The Sensitivity Analysis Of The Process Parameters During Forging Of Large Steel Ingot, Bo Jiang, Yazheng Liu, Jianlin Sun, Guanglei Liu, Zhilin Wang, Zhigang Zhao
Void Closure And The Sensitivity Analysis Of The Process Parameters During Forging Of Large Steel Ingot, Bo Jiang, Yazheng Liu, Jianlin Sun, Guanglei Liu, Zhilin Wang, Zhigang Zhao
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Fatigue Analysis Of The Welded Region In The Automotive Torsion Beam Rear Suspension System, Nan Zhan, Xiaochuan Zhang
Fatigue Analysis Of The Welded Region In The Automotive Torsion Beam Rear Suspension System, Nan Zhan, Xiaochuan Zhang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Computer-Aided Design Of Algorithms Of Pulsed Control Of Arc Welding Process Based On Numerical Simulation, Oksana I. Shpigunova, Anatoliy A. Glazunov
Computer-Aided Design Of Algorithms Of Pulsed Control Of Arc Welding Process Based On Numerical Simulation, Oksana I. Shpigunova, Anatoliy A. Glazunov
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
The Influence Of Welding Parameters On Initial Instability Dynamics During Solidification, Fengyi Yu, Yanhong Wei, Xiaohong Zhan
The Influence Of Welding Parameters On Initial Instability Dynamics During Solidification, Fengyi Yu, Yanhong Wei, Xiaohong Zhan
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Process Optimization Of Water Chamber Based On Numerical Simulation, Yang Jian Ning, Yang Yi, Yang Gang
Process Optimization Of Water Chamber Based On Numerical Simulation, Yang Jian Ning, Yang Yi, Yang Gang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Temperature Filed Numerical Simulation Of Laser Welding For Ta15 Titanium Alloy By Coupling Thermal And Phase Transformation, Wenmin Ou, Yanhong Wei, Xiaohong Zhan, Gaoyang Mi
Temperature Filed Numerical Simulation Of Laser Welding For Ta15 Titanium Alloy By Coupling Thermal And Phase Transformation, Wenmin Ou, Yanhong Wei, Xiaohong Zhan, Gaoyang Mi
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Numerical Simulation Of The Influence Of Ceramic Preform On The Infiltration Process Of Metal Matrix Composites, Chang-Chun Dong, Jian-Xin Zhou, Ya-Jun Yin, Xu Shen
Numerical Simulation Of The Influence Of Ceramic Preform On The Infiltration Process Of Metal Matrix Composites, Chang-Chun Dong, Jian-Xin Zhou, Ya-Jun Yin, Xu Shen
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Dynamic Visualization Of Weld Pool And Appearance For Manual Arc Welding Based On Quasi 3d Mesh Method, Zhe Li, Zhenzhen Xu, Jianxun Zhang
Dynamic Visualization Of Weld Pool And Appearance For Manual Arc Welding Based On Quasi 3d Mesh Method, Zhe Li, Zhenzhen Xu, Jianxun Zhang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Simulation On The Sealing Of Aluminum Ball Joint, Haobin Tian, Xiaohang Liu, Xuelei Li, Jun Feng
Simulation On The Sealing Of Aluminum Ball Joint, Haobin Tian, Xiaohang Liu, Xuelei Li, Jun Feng
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Temperature Distributions Influencing Lateral Spread In Industrial Hot Rolling, Baohui Tian, Siegfried Kleber, Silvia Zinner, Peter Markiewicz
Temperature Distributions Influencing Lateral Spread In Industrial Hot Rolling, Baohui Tian, Siegfried Kleber, Silvia Zinner, Peter Markiewicz
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Numerical Simulation Of Material Flow During Fsw To Predict Defect Generation Based On Non-Uniform Tool–Material Contact Condition, Yu-Can Zhu, Gao-Qiang Chen, Shuai Zhang, Qi-Long Cheng, Qi-Long Cheng, Gong Zhang, Qing-Yu Shi
Numerical Simulation Of Material Flow During Fsw To Predict Defect Generation Based On Non-Uniform Tool–Material Contact Condition, Yu-Can Zhu, Gao-Qiang Chen, Shuai Zhang, Qi-Long Cheng, Qi-Long Cheng, Gong Zhang, Qing-Yu Shi
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Modeling And Simulation Of Dendrite And Porosity Evolution During Solidification In The Molten Pool Of Al–Cu Alloys, Cheng Gu, Yanhong Wei, Xiaohong Zhan
Modeling And Simulation Of Dendrite And Porosity Evolution During Solidification In The Molten Pool Of Al–Cu Alloys, Cheng Gu, Yanhong Wei, Xiaohong Zhan
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Design And Validation Of Parametric Modelling Platform Based On Abaqus, Weiwei Wang, Binbin Jia, Nan Zheng, Chen Zhao
Design And Validation Of Parametric Modelling Platform Based On Abaqus, Weiwei Wang, Binbin Jia, Nan Zheng, Chen Zhao
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Calphad-Based Materials Genome And Its Applications To Additive Manufacturing, Wei Xiong
Calphad-Based Materials Genome And Its Applications To Additive Manufacturing, Wei Xiong
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.