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Articles 661 - 690 of 13029
Full-Text Articles in Engineering
Viability Of Widely Used Encryption Schemes In Drone Transmission, Emanuel Yasir Nelson
Viability Of Widely Used Encryption Schemes In Drone Transmission, Emanuel Yasir Nelson
Cybersecurity Undergraduate Research Showcase
This paper presents throughout research on the security issues related to drone transmission. These topics were addressed and explained, in particular the aspects relating to cybersecurity, for utmost clarity. These include threats and vulnerabilities, drone transmission the impact of encryption on latency, and the details of the encryption methods AES-128, AES-256, and ChaCha20 that were used in the experiment described in the paper. Each encryption method performance was measured and outputted by the Python code developed and used in the experiment. Afterwards, the performance of each method was analyzed in relation to their decryption time, encryption time, end to end …
Global-Local Method For Poroelasticity Problems With Localized Pressure Effects, Hemantha Kunwar
Global-Local Method For Poroelasticity Problems With Localized Pressure Effects, Hemantha Kunwar
Math Department Colloquium Series
In many poroelasticity applications, pressure effects are confined to a small region, making it inefficient and possibly unnecessary to solve the full system across the entire domain. Instead, we propose to solve the poroelasticity problem locally, where pressure effects are significant, and use a simpler linear elasticity model elsewhere. This creates a coupled elasticity–poroelasticity problem with transmission conditions. To solve this coupled problem, we propose a new non-intrusive global–local algorithm that iteratively solves the elasticity problem in the entire (global) domain and the poroelasticity problem only in a local domain, ensuring proper transmission conditions across the interface. This approach, which …
A Transition Framework For Hybrid Tls In Enterprise-Level Systems, William Hadd
A Transition Framework For Hybrid Tls In Enterprise-Level Systems, William Hadd
Cybersecurity Undergraduate Research Showcase
Enterprises face an immediate need to protect long-lived data against harvest-now, decrypt-later threats while maintaining interoperability across layered systems. With NIST’s first post-quantum standards finalized (ML-KEM, ML-DSA, SLH-DSA) and TLS hybridization drafts defining concrete ECDHE + ML-KEM groups, adoption can begin at the TLS termination layer even before full ecosystem support for post-quantum signatures arrives (NIST, 2024; IETF, 2025). In this paper, we propose an enterprise-oriented transition framework and maturity model for hybrid TLS across email, internal API gateways, and object storage. We specify where to enforce, which hybrid groups to select, and how to prevent silent downgrade with policy …
Sulfurized Serpentine And Perovskite Assisted Graphitic Carbon Nitride Nanocomposites For Photocatalytic Green Hydrogen Production, Yahia Alanizan
Sulfurized Serpentine And Perovskite Assisted Graphitic Carbon Nitride Nanocomposites For Photocatalytic Green Hydrogen Production, Yahia Alanizan
Thesis/ Dissertation Defenses
Green hydrogen production has received great attention in recent years as a solution to mitigate greenhouse gas emissions resulted by burning fossil fuels. This thesis focuses on development of photocatalytic water splitting green hydrogen production under visible light irradiation of g-C3N4 based sulfurized naturally occurring serpentine rock and oxysulfide perovskite nanocomposites. This work reveals the effect of partial sulfurization of co-catalysts to boost charge generation, charge transfer, and light absorption. The presented work determined the potential of sulfurizing naturally occurring rocks and minerals acting as support and enhanced co-catalysts that exhibit narrower band gaps, with sulfur rich sites for visible …
Upcycling Carbide Slag Waste For Low-Temperature Co2 Sequestration: Direct Application And Adsorption After Chemical Alteration, Manisha Sukhraj Kothari
Upcycling Carbide Slag Waste For Low-Temperature Co2 Sequestration: Direct Application And Adsorption After Chemical Alteration, Manisha Sukhraj Kothari
Thesis/ Dissertation Defenses
Excessive carbon dioxide (CO₂) emissions and large-scale industrial waste generation are the results of rapid industrialization and ever-increasing energy demand. The recent trend of repurposing waste materials for pollution prevention is a promising approach to address both these environmental challenges. One such industrial waste residue generated from acetylene gas production is called carbide slag (CS). Its high Ca(OH)₂ content presents a promising opportunity for its utilization in CO₂ sequestration. However, CS waste is primarily studied as a CaO source for the intensive Ca-looping process. Despite the great potential, the high temperature requirements of the Ca-looping process limit its industrial application. …
Groundwater Quality And Health Risk Assessment In The Fujairah Region Using Hydrogeochemical, Statistical, And Spatial Approaches, Mohammed Khaled Alawlaqi
Groundwater Quality And Health Risk Assessment In The Fujairah Region Using Hydrogeochemical, Statistical, And Spatial Approaches, Mohammed Khaled Alawlaqi
Thesis/ Dissertation Defenses
Groundwater is a valuable resource in the arid climate of the United Arab Emirates, where growing population, agricultural, and industrial activities are putting increasing pressure on limited groundwater reserves. This study investigates the hydrogeochemical characteristics of groundwater in the Fujairah region, with a particular focus on major ions and trace metals, to assess water quality and potential health risks. A total of 64 groundwater samples were collected from the Eastern Shallow Aquifer (ESA) and the Ophiolite aquifer in the study area and were analyzed for physicochemical parameters, major ions, and trace metals. Hydrogeochemical interpretation was conducted using Piper, Gibbs, Chadha, …
Enhancement Of Aeration And Activated Sludge Processes Using Micronanobubbles For Efficient Wastewater Treatment, Marwa Ahmed Abdelhamid
Enhancement Of Aeration And Activated Sludge Processes Using Micronanobubbles For Efficient Wastewater Treatment, Marwa Ahmed Abdelhamid
Thesis/ Dissertation Defenses
Aeration is considered one of the most reliable and efficient processes in wastewater treatment. However, conventional aeration systems show low performance with respect to the gas transfer during the treatment process. This poses a challenge in maintaining sufficient dissolved oxygen (DO) concentrations essential for the treatment. The use of micronanobubbles (MNBs) in the aeration process has been proposed as effective tool in water and wastewater treatment owing to their stability and longevity. MNBs’ stability is a distinctive property resulting from several mechanisms, including the repulsion force due to charged surfaces that helps bubbles to resist coalescence/bursting. MNBs’ longevity is represented …
Investigation Of Mechanical Performance And Metallurgical Characteristics Of Titanium Grade 2 Tube-To-Tubesheet Joints, Ahmad Hussein Al Tamimi
Investigation Of Mechanical Performance And Metallurgical Characteristics Of Titanium Grade 2 Tube-To-Tubesheet Joints, Ahmad Hussein Al Tamimi
Thesis/ Dissertation Defenses
Tube-to-tubesheet joints, an integral component of shell and tube heat exchangers, are known for their vulnerability to leakage problems at the joint region due to mechanical and chemical factors coupled with fabrication techniques involved in creating these joints. An ideal condition of manufacturing process parameters and geometrical variables required to produce tube-to-tubesheet joints is highly desired. One of the most promising candidate materials to fabricate tube-to-tubesheet joints is titanium or titanium alloys due to their excellent strength and resistance to corrosion. The present study investigates the structural integrity of three categories of Titanium Grade 2 based tube-to-tubesheet joints comprising of …
Thermo-Chemical Recycling Of Waste Plastics Containing Halogenated Polymers (Br−, Cl−, F−) Using Potential Additives, Mohamed Shafi
Thermo-Chemical Recycling Of Waste Plastics Containing Halogenated Polymers (Br−, Cl−, F−) Using Potential Additives, Mohamed Shafi
Thesis/ Dissertation Defenses
Plastic waste handling is a daunting task due to the presence of halogenated polymers, specifically those cluttered with bromine (Br), chlorine (Cl), and fluorine (F). Halogenated plastics can be mixed with other polymers in the general plastic waste, particularly in the recycling stream. Brominated flame retardants (BFRs) are mainly present in e-waste and from the use of flame retardants in household items, textiles, and furniture. Plastics from discarded electronics often contain significant levels of bromine and chlorine, predominantly from flame retardants and plasticizers. Being the most deployed thermoplastic worldwide, waste polyvinyl chloride (PVC) generation is expected to increase by about …
Potential Use Of Waste-Derived Products In Producing Geopolymer Sorbents, Mariam Mohammed Al Nuaimi
Potential Use Of Waste-Derived Products In Producing Geopolymer Sorbents, Mariam Mohammed Al Nuaimi
Thesis/ Dissertation Defenses
Environmental sustainability and the circular economy are central to addressing global challenges in waste management and water pollution. This study investigates the synthesis and performance of geopolymers derived from industrial wastes, including fly ash, waste glass, silt deposits, and carbide lime, as adsorbents for methylene blue (MB) dye removal from water. Geopolymers were engineered under varying particle sizes, NaOH addition methods, and curing temperatures. Their physicochemical and microstructural properties were thoroughly characterized via scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infrared Spectroscopy (FTIR), andparticle size analysis (PSA). Among the tested formulations, the sodium silicate–sodium hydroxide …
Blockchain In Smart Cities, Shamma Alnuaimi
Blockchain In Smart Cities, Shamma Alnuaimi
Thesis/ Dissertation Defenses
This thesis explores the integration of blockchain technology with smart cities to enhance efficiency, transparency, and reliability. The basic principles of blockchain, its layered architecture, consensus protocols, and decentralized security are first reviewed. The thesis then highlights how blockchain features can be integrated with urban and energy systems. The research focuses on how token economy can be used with smart cities to promote individuals to engage in desired behaviors by employing blockchain-based incentive mechanisms that can encourage responsible energy consumption.
The FairChain test system was developed and tested using blockchain technology and the Internet of Things (IoT) to demonstrate the …
Development Of Composite Membranes And Nanofluid Absorbents Incorporating Surface-Functionalized Nanoparticles For Enhanced Co₂ Absorption In Gas–Liquid Membrane Contactors, Riya Ahammed Labeeb
Development Of Composite Membranes And Nanofluid Absorbents Incorporating Surface-Functionalized Nanoparticles For Enhanced Co₂ Absorption In Gas–Liquid Membrane Contactors, Riya Ahammed Labeeb
Thesis/ Dissertation Defenses
Natural gas sweetening demands the efficient removal of CO₂ to enhance heating value and prevent equipment corrosion. Gas–liquid membrane contactors (GLMCs) have garnered attention as promising solutions to traditional separation methods due to their modularity, high interfacial area, and energy efficiency. Nonetheless, they suffer from some serious challenges such as membrane wetting, while absorbents either exhibit low absorption capacity or high energy demands and corrosion. This work addresses these limitations through two complementary strategies. In the first, ZnO nanoparticles were hydrophobically functionalised and incorporated into polymer matrices to fabricate composite membranes with superior hydrophobicity and reduced pore wetting. In the …
Bio-Corrosion Studies On Novel Zr‑Co‑Ti Based Metallic Glass Alloys For Biomedical Implant Applications, Shubhra Shitole
Bio-Corrosion Studies On Novel Zr‑Co‑Ti Based Metallic Glass Alloys For Biomedical Implant Applications, Shubhra Shitole
Thesis/ Dissertation Defenses
The relentless pursuit of advanced biomaterials that synergistically combine high mechanical strength, exceptional corrosion resistance, and inherent biocompatibility is critical for next-generation medical implants. This research addresses this challenge through the development and multi-faceted evaluation of a novel library of Zr-Co-Ti-based metallic glasses (MGs); Zr60Co30Ti10, Zr55Co35Ti10, and Zr50Co40Ti10, fabricated via melt-spinning. The alloys were confirmed to be fully amorphous by X-ray diffraction (XRD), a structure underpinned by exceptional thermal stability, with the Zr60 composition exhibiting a larger supercooled liquid region (Δ𝑇𝑥) of …
Durability Of Basalt Fiber-Reinforced Polymer Bars In Moist Concrete Under Sustained Load, Osama Ahmed
Durability Of Basalt Fiber-Reinforced Polymer Bars In Moist Concrete Under Sustained Load, Osama Ahmed
Thesis/ Dissertation Defenses
This thesis is concerned with the long-term durability of basalt fiber-reinforced polymer (BFRP) bars embedded in moist concrete. The study focuses on the combined effects of exposure duration, elevated temperature, and sustained tensile stress, which together influence the mechanical and chemical stability of BFRP reinforcement in aggressive environments. The main objective is to evaluate the degradation mechanisms of BFRP bars subjected to coupled hygrothermal and mechanical conditions and to develop a predictive durability model capable of estimating service life under realistic climate scenarios. Concrete-encased BFRP bars were conditioned at three temperatures (20, 40, and 60°C), three durations (3, 6, and …
Yolo-Based Marine Search And Rescue Using Uav Multi-Dataset In Challenging Weather Conditions, Aysha Alshebli
Yolo-Based Marine Search And Rescue Using Uav Multi-Dataset In Challenging Weather Conditions, Aysha Alshebli
Thesis/ Dissertation Defenses
Object detection models, powered by deep learning and computer vision, are revolutionizing marine search and rescue (SAR). By analyzing aerial imagery and live drone footage, these systems automatically identify critical targets like survivors, life rafts, and debris across vast and treacherous ocean areas. This capability enhances operational efficiency by reducing human workload and accelerating response times, even in challenging conditions such as poor light, high seas, or cluttered backgrounds. The result is continuous monitoring, faster decision-making, and a significantly improved probability of successful rescue.
Departing from prior methodologies, YOLO introduced a paradigm shift through its single-shot architecture, which concurrently predicts …
Investigate The Performance And Airtightness Of Short Carbon Fiber Reinforced Polypropylene Pressure Vessel Fabricated Via Fdm 3d Printing, Trad Abdallah Abualbandora
Investigate The Performance And Airtightness Of Short Carbon Fiber Reinforced Polypropylene Pressure Vessel Fabricated Via Fdm 3d Printing, Trad Abdallah Abualbandora
Thesis/ Dissertation Defenses
This work offers a thorough investigation into the performance of 3D-printed, short carbon fiber-reinforced polypropylene pressure vessels, specifically designed for gas storage in demanding sectors like aerospace, drones, and medical equipment, operating within a pressure range of 0-10 bar. A key challenge in FDM additive manufacturing of pressure vessels is achieving airtightness due to the inherent porosity and micro-gaps resulting from the printing process. To address this, the fabricated vessel models were coated with various commercially available materials to effectively fill these microscopic imperfections and ensure the necessary tightness. Spray coating and adhesion coating materials were applied to the outer …
Rehabilitation Of Reinforced Concrete Columns Pre-Damaged By Corrosion Using Advanced Composite Materials, Feras Farid Abu Obaida
Rehabilitation Of Reinforced Concrete Columns Pre-Damaged By Corrosion Using Advanced Composite Materials, Feras Farid Abu Obaida
Thesis/ Dissertation Defenses
Reinforced concrete (RC) columns exposed to aggressive environments are highly susceptible to corrosion-induced deterioration, resulting in significant reductions in load-carrying capacity. This research investigates the structural performance of RC circular short columns with varying levels of corrosion damage and evaluates the effectiveness of two composite-based repair techniques, namely carbon fabric-reinforced cementitious matrix (C-FRCM) and carbon fiber-reinforced polymer (C-FRP) composites, combined with concrete cover replacement. The study aims to establish these methods as practical solutions for rehabilitating corrosion-damaged columns under concentric and eccentric loading conditions. The experimental program included 30 RC column specimens tested in two phases. Phase I involved thirteen …
A Novel Drug-Loaded Injectable Hydrogel System Using Oxidized Inulin And Pluronic F-127 With Β-Cyclodextrin Nanocrystals For Ocular Defect Treatment, Salama Al Dhaheri
A Novel Drug-Loaded Injectable Hydrogel System Using Oxidized Inulin And Pluronic F-127 With Β-Cyclodextrin Nanocrystals For Ocular Defect Treatment, Salama Al Dhaheri
Thesis/ Dissertation Defenses
The human eyes have the most complex and advanced defence mechanisms. Due to this barrier, efficient treatment of ocular disorders is always a crucial issue, especially while treating the posterior segment of the eyes. Most of the diseases occurring in the posterior segment of the eyes include age-related macular degeneration, retinitis, diabetic retinopathy and uveitis. Topical and systemic administration of drugs, intravitreal injection, and insertion of non-biodegradable implants are several different approaches employed to treat ocular diseases. These methods have shown promising results in treating age-related macular degeneration but require higher dosage and multiple administration of the drug to the …
Bioactive Membrane System For Efficient Emerging Pollutants Treatment, Ayat El Telib El Tayeb
Bioactive Membrane System For Efficient Emerging Pollutants Treatment, Ayat El Telib El Tayeb
Thesis/ Dissertation Defenses
Emerging pollutants (EPs), such as pharmaceuticals and personal care products, are increasingly detected in municipal wastewater due to household discharge and improper industrial disposal. Their persistence and ecological risks pose major challenges to conventional treatment technologies. Among advanced options, membrane filtration, particularly microfiltration and ultrafiltration, has gained prominence for its efficiency and scalability. However, membrane fouling, especially biological and chemical fouling, remains a critical barrier, accounting for nearly half of total energy consumption and requiring frequent use of harsh chemical cleaning agents that further burden the environment.
This PhD research addresses these challenges by developing and evaluating hybrid bioactive enzyme-active …
Downdrag Defeated – The Neutral Plane Method, Kyle L. Zak, Min Sang Lee
Downdrag Defeated – The Neutral Plane Method, Kyle L. Zak, Min Sang Lee
Civil Engineering Professional Development Seminar
The neutral plane method for evaluating downdrag on deep foundations has been gaining popularity over the past few years. It is a powerful tool that, in many situations, can all but eliminate downdrag concerns on deep foundations. INDOT has allowed its use recently and adapted its forms to accommodate this method. The presentation will cover the theory behind the method and how it can be applied in bridge design. We will then demonstrate how to incorporate the method into the INDOT workflow, and we’ll show a couple real-life examples where the neutral plane method saved the day.
Curbless By Design: Revitalizing Downtown Infrastructure For Pedestrians, Alex Duran, Steve Cherry
Curbless By Design: Revitalizing Downtown Infrastructure For Pedestrians, Alex Duran, Steve Cherry
Civil Engineering Professional Development Seminar
This presentation will discuss the design of a curbless, pedestrian-focused corridor as part of a small-town downtown reconstruction in Sylvania, Ohio. The project team will share how they balanced community goals, accessibility, and utility coordination, along with considerations for drainage, hardscape, lighting, and power. The session will also highlight early construction lessons learned from Phase 1.
Guardrail Design And Placement 101, Katherine Smutzer
Guardrail Design And Placement 101, Katherine Smutzer
Civil Engineering Professional Development Seminar
Not all “guardrail” is created equal. Within the last 10 years INDOT has adopted the MASH-compliant Midwest Guardrail System (MGS). While similar to the previous standard w-beam guardrail, there are nuances that aren’t well understood by designers. The presentation would reinforce the fundamentals of guardrail as a safety barrier, explain the function of various components of a guardrail system, and review important design considerations.
Mass Timber Construction: Products, Performance And Design, Anthony Harvey
Mass Timber Construction: Products, Performance And Design, Anthony Harvey
Civil Engineering Professional Development Seminar
Due to their high strength, dimensional stability and positive environmental performance, mass timber building products are quickly becoming materials of choice for sustainably‐minded designers. This presentation will provide a detailed look at the variety of mass timber products available, including glue‐laminated timber (glulam), cross laminated timber (CLT), nail laminated timber (NLT), heavy timber decking, and other engineered and composite systems. Applications for the use of these products under modern building codes will be discussed, and examples of their use in U.S. projects reviewed. Mass timber’s ability to act as both structure and exposed finish will also be highlighted, as will …
Designing And Writing Effective Data Management Plans For Grant Proposals, Rubab Shahzad, Ibis Anette Moreno-Lozano
Designing And Writing Effective Data Management Plans For Grant Proposals, Rubab Shahzad, Ibis Anette Moreno-Lozano
Day Family Research Lab Workshop Series
Fundamentals of research data management and how to create effective Data Management Plans (DMPs).
Numerical Modeling Of Circular Reinforced Concrete Columns Confined With Frcm Composites, Ahmed Khaled Elzaher
Numerical Modeling Of Circular Reinforced Concrete Columns Confined With Frcm Composites, Ahmed Khaled Elzaher
Thesis/ Dissertation Defenses
Fabric-reinforced cementitious matrix (FRCM) composites are considered a promising alternative for strengthening reinforced concrete (RC) columns due to the noncorrosive nature of the fiber strands and the enhanced thermal resistance of the cementitious mortar. The interaction between the confinement provided by the internal steel ties and the external FRCM composites represents a key parameter that has not yet been thoroughly investigated. The complexity of this combined FRCM–steel confinement mechanism increases under eccentric compression loading, which is commonly encountered in practical applications. This study aimed to investigate the structural behavior of short circular RC columns confined with FRCM composites under concentric …
Child Occupant Safety In The United Arab Emirates: Crash, Injury, And Anthropometric Analysis, Muhammad Uba Abdulazeez
Child Occupant Safety In The United Arab Emirates: Crash, Injury, And Anthropometric Analysis, Muhammad Uba Abdulazeez
Thesis/ Dissertation Defenses
The United Arab Emirates (UAE) has one of the highest rates of child occupant injuries and fatalities globally. A comprehensive review of the literature revealed very limited research on child occupant injuries and fatalities in the UAE. All but two of the identified studies relied on data from Al Ain-based sources namely - Al Ain Department of Preventive Medicine, Al Ain Hospital, and Tawwam Hospital - and were restricted to that city. Furthermore, most of these studies were conducted nearly 30 years ago with the two most recent ones (conducted over a decade ago) based on crash data that was …
Core-Scale Study Of Miscible Co2 Foam–Oil Interactions, Kuvonchbek Abdirakhmonov
Core-Scale Study Of Miscible Co2 Foam–Oil Interactions, Kuvonchbek Abdirakhmonov
Thesis/ Dissertation Defenses
Foam is currently the most effective means for gas mobility control in a variety of geo-energy applications (Rossen et al., 2020), including enhanced oil recovery (EOR), carbon capture, utilization, and storage (CCUS), and aquifer/soil remediation. This study investigates the mobility control of miscible CO2 foam in the presence of oil for CCUS. The primary objective is to quantify the impact of oil on CO2 foam behavior under miscible conditions, specifically examining foam stability, strength, and flow regimes as influenced by oil composition and reservoir permeability. While most oils destabilize foam, few studies explore the coarsening mechanisms of CO2 foam in …
Microstructural And Mechanical Characterization Of Aa6082 /Sic/Al2o3 Hybrid Nanocomposite Fabricated By Ultrasonic-Assisted Vacuum Die Stir Casting, Anasmon Koderi Valappil
Microstructural And Mechanical Characterization Of Aa6082 /Sic/Al2o3 Hybrid Nanocomposite Fabricated By Ultrasonic-Assisted Vacuum Die Stir Casting, Anasmon Koderi Valappil
Thesis/ Dissertation Defenses
The utilization of aluminium alloys has increased rapidly in past decades due to the increasing demand for lightweight and high-performance materials. Among the popular aluminium alloys, AA6082 is widely favoured for its excellent combination of strength, corrosion resistance, and machinability. Most previous work, however, has concentrated on either on micro scale reinforcement or on single ceramic particles, leaving very few experimental studies on the use of hybrid nano reinforcement in AA6082. Therefore, to further enhance its mechanical properties without compromising its inherent advantages, hybrid metal matrix composites were developed using various nano particulates as reinforcements. In this current study, AA6082-based …
Robust Control Of Lcl-Filtered Three-Phase Grid-Tied Inverters Using H∞ Synthesis: Design, Analysis, And Experimental Validation, Mohammad Rousan
Robust Control Of Lcl-Filtered Three-Phase Grid-Tied Inverters Using H∞ Synthesis: Design, Analysis, And Experimental Validation, Mohammad Rousan
Thesis/ Dissertation Defenses
This thesis presents the design, development, and practical implementation of various robust current control strategies for LCL-filtered gridtied inverters, with the aim of maintaining robust stability over a range of plant perturbations, while ensuring high-quality current delivery to the utility grid. Chapter One presents the literature review, while Chapter Two focuses on the modeling of the system under study. In the third Chapter, the system dynamics are augmented with an appropriate servo-compensator to ensure that, at steady-state, the grid current accurately tracks its sinusoidal reference with zero steady-state error, even in the presence of model uncertainties. This augmented system serves …
Impact Of The Inclination Angle Of Corrugated Energy Absorbers On The Crashworthiness Performance: Numerical Study, Mahmoud Mohammad Ousama
Impact Of The Inclination Angle Of Corrugated Energy Absorbers On The Crashworthiness Performance: Numerical Study, Mahmoud Mohammad Ousama
Thesis/ Dissertation Defenses
In the present study, cylindrical energy absorbers with various corrugation inclination angles were numerically analysed to evaluate their crashworthiness under quasi-static axial loading. Simulations were performed using ANSYS/Explicit Dynamics, operated in a quasi-static regime by applying a sufficiently slow loading rate to suppress inertial effects. Seven designs were evaluated: a smooth tube (no corrugation) and corrugated tubes with inclination angles of 0°, 15°, 30°, 45°, 60°, and 90°, measured from the horizontal axis.
The total absorbed energy (TAE), mean crushing load (MCL), stroke efficiency (SE), specific energy absorption (SEA), initial peak force (IPF), and crushing force efficiency (CFE) were computed …