Article
Chemistry, Multidisciplinary
Samer Fakhri Abdulqadir, Faris Tarlochan
Summary: This study validates the application of carbon fiber composite materials for energy absorption in vehicle crashes, demonstrating that new designs and composite materials can reduce weight without compromising safety. Experimental data was used to validate a computational model.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Chengxing Yang, Ziliang Zhao, Weinian Guo, Ping Xu, Shengtong Zhou, Lingyun Yan, Xihong Jin
Summary: This study presents a method for optimizing the crashworthiness of a subway vehicle's crush zone structure using a beam element model. A simplified beam element model was first established to verify the feasibility, followed by proposing a parameterized modeling method for the energy-absorbing structures and front-end beam. A hybrid-weight prediction model of the mechanical curves was developed and a database of mechanical and geometric parameters was established. Through optimization using genetic algorithm, beam element models with different arrangement schemes were obtained. The proposed method provides a fast and convenient guideline for optimizing and upgrading energy-absorbing structures.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
Chengfu Shu, Shujuan Hou, Y. X. Zhang, Yutao Luo
Summary: This paper analyzes and compares the crashworthiness behaviors of multi-layered corrugated sandwich panels with different configurations, finding the optimal configuration through orthogonal experimental design and range analysis method. A novel structure with functionally graded thickness is proposed and studied. Finite element models are established and validated, and parametric studies and multi-objectives optimization are conducted for the proposed structure.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
Jaeho Shin, Kyungjin Kim, Kyeonghee Han, Jeong Min In, Hyung-Jin Chang, Sojung Shim, Siwoo Kim
Summary: This study focuses on evaluating the crashworthiness of hydrogen buses, specifically the safety measures for the fuel systems located on the roof structure. Through rollover tests and computational approaches, the study provides a conceptual framework for evaluating the crashworthiness of hydrogen buses.
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY
(2022)
Article
Engineering, Civil
Haibao Liu, Jin Zhou, Di Zhang, Shipeng Li, Ioannis Giannopoulos
Summary: This paper presents a three-dimensional composite damage model for predicting the crush response of thin-walled structures. The model is validated using experimental data and is used to investigate the effects of contact friction and ply blocking on the crush response of thin-walled composite structures. The results show that friction has a positive effect on the crushing performance, while ply blocking inhibits it.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Maolin Dai, Zhiqiang Huang
Summary: An analysis was conducted on the influence of different factors on the rollover stability of vibroseis trucks, and a rollover warning index and anti-rollover warning system were established. Simulation analysis with MATLAB/Simulink software showed that the warning system accurately determined the driving state and produced four types of sound-light alarms. The study also found that vibroseis trucks exhibited poor roll stability in the slope steering process, making them more prone to rollover accidents. This research provides a foundation for further studying warning system designs for both vibroseis trucks and other articulated trucks.
APPLIED SCIENCES-BASEL
(2023)
Review
Emergency Medicine
Brit Long, Stephen Y. Liang, Michael Gottlieb
Summary: Disasters can cause mass casualties, including crush injury and crush syndrome. Emergency clinicians need to have a focused understanding of these conditions as they are at the forefront of evaluating and treating these patients.
AMERICAN JOURNAL OF EMERGENCY MEDICINE
(2023)
Article
Materials Science, Multidisciplinary
Kathiresan Muthiah, Manisekar Kondal, Vasudevan Rajamohan, Mehmet A. Guler
Summary: The study investigated the changes in energy-absorption and deformation characteristics of thin-walled E-glass fiber reinforced composite conical frusta upon introduction of cutouts through quasi-static axial compression loading. Different semi-apical angled conical frusta with various shapes of cutouts were compressed to analyze the crush-force-efficiency, energy-absorption, and specific-energy-absorption characteristics. Finite element software was used to simulate the crush behavior and compare it with experimental results, with findings reported in the article.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Review
Medicine, Research & Experimental
Daisuke Usuda, Shintaro Shimozawa, Hiroki Takami, Yoshinobu Kako, Taigo Sakamoto, Junya Shimazaki, Junichi Inoue, Shinichi Nakayama, Yuichi Koido, Jiro Oba
Summary: Disasters and accidents have been occurring more frequently in recent years, leading to mass casualty events and crush syndrome (CS) in many cases. However, our current knowledge and treatments for CS have not been updated for over ten years. This review aims to provide an overview and update on CS for prehospital providers and emergency clinicians.
JOURNAL OF TRANSLATIONAL MEDICINE
(2023)
Article
Engineering, Industrial
Peter Simeonov, Hongwei Hsiao, Ashish Nimbarte, Richard Current, Douglas Ammons, Hee-Sun Choi, Md Mahmudur Rahman, Darlene Weaver
Summary: The Curve Speed Warning System (CSWS) for firetrucks was found effective in issuing preemptive warnings, reducing driving speed, decreasing severe braking, and earning positive feedback from firefighters during testing.
APPLIED ERGONOMICS
(2021)
Review
Critical Care Medicine
Yahua Liu, Mengyang Yu, Li Chen, Jing Liu, Xin Li, Chengying Zhang, Xueyuan Xiang, Xiaoxue Li, Qi Lv
Summary: This systematic literature review examines the different animal models used in crush syndrome research and their benefits, providing valuable information for future studies. The review found that the two primary methods for inducing crush syndrome in animal models are chemical and physical methods. Various animal species have been used, with small animals more suitable for mechanism and efficacy studies, and large animals better for clinical application-related research. Compressing a specific muscle with heavy objects is the most effective method, but careful consideration must be given to the selection of appropriate anesthetics and analgesics due to the burden on animals.
Article
Chemistry, Multidisciplinary
Delai Zhang, Yimin Mo, Minghao Ding, Yongbin Liang
Summary: In the field of van design, this paper proposes a method to enhance rollover crashworthiness and achieve lightweight body structures. Through factor screening using an unreplicated factorial design, the paper effectively resolves the challenges of dealing with numerous factors and eliminates reliance on traditional design experience. Additionally, a hybrid algorithm combining particle swarm optimization and artificial immune algorithm is used to address the multi-objective optimization problem of improving crashworthiness while reducing mass. The proposed method significantly shortens the design cycle and reduces development costs.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Bruno Mussulini, Larissa Driemeier, Rafael Traldi Moura, Renato Teixeira Vargas, Henrique Ramos, Marcilio Alves
Summary: Crashworthiness is crucial and challenging in automotive design. Friction is an important parameter in finite element crash simulation, affecting both vehicle kinematics and occupant interaction. A test rig was designed to measure the friction coefficient of both hard and soft material contact pairs, allowing for the calculation of a new friction coefficient model that captures a wider range of tribological phenomena.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Farshid Afshar, Seyedehsan Seyedabrishami, Sara Moridpour
Summary: This study uses machine learning techniques to analyze the severity of traffic crashes and identifies important factors that influence crash severity, particularly traffic-related variables and the involvement of vulnerable road users.
SCIENTIFIC REPORTS
(2022)
Review
Medicine, General & Internal
Yu Luo, Chunli Liu, Duo Li, Bofan Yang, Jie Shi, Xiaoqin Guo, Haojun Fan, Qi Lv
Summary: Crush syndrome, caused by external compression and commonly seen in disasters like earthquakes and traffic accidents, is a wide-ranging syndrome with various clinical complications. It is the second leading cause of death in disasters and is characterized by hyperkalemia, myoglobinuria, and acute kidney injury. Early diagnosis and prognosis evaluation are crucial in reducing mortality rates.
Article
Engineering, Civil
Quantian Luo, Liyong Tong, Mani Khezri, Kim J. R. Rasmussen, Mike R. Bambach
Summary: This study presents an optimal design problem to maximize the airflow opening of a thin-walled structure for efficient ventilation, deriving a novel formulation for airflow opening in plates or shells with large deflections and solving the maximum airflow problem as a topology optimization problem. Numerical examples demonstrate that optimizing laminated plates in a similar shape to their critical buckling mode can greatly increase airflow opening compared to flat plates with the same material and thickness.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Industrial
Jan Petrik, Benjamin Sydow, Markus Bambach
Summary: This study focuses on the 3D reconstruction of weld beads in non-straight deposition paths and proposes an AI-based architecture called AIBead that can predict the geometry of weld beads more accurately.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Review
Engineering, Mechanical
Mehrshad Mehrpouya, Daniel Tuma, Tom Vaneker, Mohamadreza Afrasiabi, Markus Bambach, Ian Gibson
Summary: This study reviews the current state of the art in powder bed fusion (PBF) techniques for additive manufacturing of multiple materials, and summarizes the latest simulation approaches for modeling them. The development of multimaterial PBF techniques is still in its infancy, and modeling and simulation can be helpful but need further development. The study also discusses novel printing methods and provides information on the simulation efforts and computational models in multimaterial PBF.
RAPID PROTOTYPING JOURNAL
(2022)
Article
Engineering, Manufacturing
Lemopi Isidore Besong, Johannes Buhl, Markus Bambach
Summary: Conventional hole-flanging by stamping has low formability, while high-temperature forming and high-speed punch rotation can improve formability. Thermomechanical finite element simulations and experiments were conducted to study the effects of punch rotation, temperature, and strain rate on formability. Hole flanging with punch rotation achieved a higher hole expansion ratio compared to conventional hole-flanging, and the difference in formability was attributed to high-speed deformation, in-plane shear, and non-proportional loading paths.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2022)
Article
Engineering, Manufacturing
Merve Nur Dogu, Eanna McCarthy, Ronan McCann, Vivek Mahato, Annalina Caputo, Markus Bambach, Inam Ul Ahad, Dermot Brabazon
Summary: Metal additive manufacturing has many potential advantages, but determining process parameters for specific properties can be time-consuming and costly. This review examines the latest advancements in controlling part properties, including the impact of microstructure. Numerical simulation and machine learning are discussed as methods for simulating microstructure formation and improving process optimization. In-situ monitoring and a hybrid approach with post-processing steps are also explored.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2022)
Article
Materials Science, Multidisciplinary
Fabian Soffel, Konrad Papis, Markus Bambach, Konrad Wegener
Summary: This study aims to develop and experimentally characterize a laser preheating process for DMD of Inconel 738LC. By adjusting parameters such as substrate temperature, specimen size, and scanning strategy, crack-free deposited structures can be achieved.
Article
Materials Science, Multidisciplinary
Rameez Israr, Johannes Buhl, Sebastian Haertel, Markus Bambach
Summary: This study introduces a novel methodology of using weld-cladding process as a cost-effective alternative to traditional reinforcement techniques. By numerical analysis and experimental verification, the reinforcement of cylindrical tools can be maximized, and targeted reinforcement of the substrate can be achieved by optimizing welding sequence and parameters.
Article
Engineering, Mechanical
Dakshitha Weerasinghe, M. R. Bambach, Damith Mohotti, Hongxu Wang, Paul J. Hazell
Summary: This study investigated the impact response of aramid Twaron CT709 fabrics coated with a rubber spray-on material, and found that the rubber coating can increase the ballistic limit velocity and energy absorption, but at certain impact velocities, the energy absorption is lower.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Civil
Dakshitha Weerasinghe, M. R. Bambach, Damith Mohotti, Hongxu Wang, Sheng Jiang, Paul J. Hazell
Summary: This study investigates the performance of polymer-coated multi-layer fabric targets in ballistic impact tests. The effect of fatigue loading on the yarn pull-out force of coated Twaron fabrics is examined for the first time. A validated mesoscale numerical modelling approach is employed to simulate the ballistic impact. The elastomeric coating significantly enhances impact resistance.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
H. Zhang, M. R. Bambach, K. J. R. Rasmussen, L. Tong, M. Khezri
Summary: This study aims to control the shape of elastic buckling modes by distributing the material thickness of a metal plate in different ways. The Evolutionary Structural Optimisation (ESO) method is used to optimize the buckled shape of the plate. The experiments demonstrate that the redistribution of plate material can efficiently control the buckling characteristics and enhance the performance of metal plates.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Quantian Luo, Liyong Tong, Mike Bambach, Kim J. R. Rasmussen, Mani Khezri
Summary: This study presents an experimental investigation into active nonlinear buckling control of optimally designed laminated plates via a new control method using shape memory alloy (SMA) and piezoelectric (PZT) actuators. The results demonstrate the effective control of both the direction and magnitude of plate buckling deformation using PZT and SMA actuators.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Prabhani Ranaweera, M. R. Bambach, Dakshitha Weerasinghe, Damith Mohotti
Summary: A comprehensive comparison between monolithic and tri-metallic steel-titanium-aluminium armour subjected to nonrigid projectile impact is presented. The study revealed that the tri-metallic target showed similar ballistic performances to the monolithic sample, and even provided superior behind-armour trauma performance.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Aliakbar Emdadi, Oleg Stryzhyboroda, Ulrike Hecht, Markus Bambach
Summary: The current research provides scientific evidence that the complex softening processes involving dynamic recovery, dynamic recrystallization, and twinning contribute efficiently to the hot deformation processing of the Al0.5CoCrFeNi alloy. The study identifies the optimal processing window for this alloy and reveals the microstructural changes that occur during deformation. The findings highlight the potential for refining the microstructure through the combination of twinning and dynamic recrystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Industrial
Markus Bambach, Iason Sideris, Maicol Fabbri, Konrad Wegener
Summary: This paper proposes a new data-driven finite volume model that can predict the transient temperature fields in wire-arc additive manufacturing. The model is able to compute temperature profiles at multiple positions efficiently, ensuring energy conservation.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Stephan Gerster, Markus Bambach, Michael Herty, Muhammad Imran
Summary: This article proposes a method for designing boundary controls for physical systems facing uncertainties, aiming to damp the impact of uncertainties rapidly. The method is based on the Lyapunov stability analysis of the random dynamics, and can be applied to various physical systems and random perturbations.
INTERNATIONAL JOURNAL FOR UNCERTAINTY QUANTIFICATION
(2022)
