Optimal crashworthiness design of a spot-welded thin-walled hat section
In automotive industry, crashworthiness design is of special interest to ensure passengers safety and reduce vehicle costs. Thin-walled beams are the main energy absorbing structures in frontal and real collisions; therefore, it is important to investigate their energy-absorption and optimize their...
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Published in | Finite elements in analysis and design Vol. 42; no. 10; pp. 846 - 855 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
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Amsterdam
Elsevier B.V
01.06.2006
Elsevier |
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Abstract | In automotive industry, crashworthiness design is of special interest to ensure passengers safety and reduce vehicle costs. Thin-walled beams are the main energy absorbing structures in frontal and real collisions; therefore, it is important to investigate their energy-absorption and optimize their performance. For crashworthiness designs of thin-walled sections, much attention has been given to the size and shape designs of the cross-section, while limited study has been performed to incorporate spot-weld modelling and their numbers as design parameters in crashworthiness optimization. The spacing of spot-welds has a strong effect on crashworthiness performance, because it can change a single complete folding length. This study focuses on the optimal crashworthiness design of a spot-welded thin-walled hat section subject to an axial crushing force. Based on comparisons to experimental data, an appropriate spot-weld model is selected and used in numerical simulations. The mass of the beam is optimized subjected to constraints of required mean crushing force and bending stiffness. A “Two-step RSM-Enumeration” algorithm is employed to efficiently solve this optimization problem of mixed-type variables. |
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AbstractList | In automotive industry, crashworthiness design is of special interest to ensure passengers safety and reduce vehicle costs. Thin-walled beams are the main energy absorbing structures in frontal and real collisions; therefore, it is important to investigate their energy-absorption and optimize their performance. For crashworthiness designs of thin-walled sections, much attention has been given to the size and shape designs of the cross-section, while limited study has been performed to incorporate spot-weld modelling and their numbers as design parameters in crashworthiness optimization. The spacing of spot-welds has a strong effect on crashworthiness performance, because it can change a single complete folding length. This study focuses on the optimal crashworthiness design of a spot-welded thin-walled hat section subject to an axial crushing force. Based on comparisons to experimental data, an appropriate spot-weld model is selected and used in numerical simulations. The mass of the beam is optimized subjected to constraints of required mean crushing force and bending stiffness. A 'Two-step RSM-Enumeration' algorithm is employed to efficiently solve this optimization problem of mixed-type variables. |
Author | Wang, Qian Fan, Zijie Xiang, Yujiang Fang, Hongbing |
Author_xml | – sequence: 1 givenname: Yujiang surname: Xiang fullname: Xiang, Yujiang organization: Center for Computer-Aided Design/College of Engineering, University of Iowa, Iowa City, IA 52242, USA – sequence: 2 givenname: Qian surname: Wang fullname: Wang, Qian organization: Center for Computer-Aided Design/College of Engineering, University of Iowa, Iowa City, IA 52242, USA – sequence: 3 givenname: Zijie surname: Fan fullname: Fan, Zijie organization: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, 100084, China – sequence: 4 givenname: Hongbing surname: Fang fullname: Fang, Hongbing email: hfang@cavs.msstate.edu organization: Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA |
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Keywords | Hat sections Spot-weld Thin-walled Response surface Methodology Crashworthiness Optimization Axial force Modeling Geometrical model Optimal design Finite element method Energy dissipation Response surface Axial load Safety Thin wall Folding Geometrical shape Spacing Experimental study Enumeration(counting) Spot weld Design process Added mass Automobile industry Mixed problem Thin walled beam Energy absorption Crush |
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Snippet | In automotive industry, crashworthiness design is of special interest to ensure passengers safety and reduce vehicle costs. Thin-walled beams are the main... |
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SubjectTerms | Computational techniques Crashworthiness Exact sciences and technology Finite-element and galerkin methods Fundamental areas of phenomenology (including applications) Hat sections Inelasticity (thermoplasticity, viscoplasticity...) Mathematical methods in physics Optimization Physics Response surface Methodology Solid mechanics Spot-weld Structural and continuum mechanics Thin-walled |
Title | Optimal crashworthiness design of a spot-welded thin-walled hat section |
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