Crashworthiness Optimization of Vehicle Structures Made of a Lightweight Magnesium Alloy

Parrish, Andrew; Rais‐Rohani, Masoud; Najafi, Ali

doi:10.2514/6.2011-1896

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Recent studies [27][28][29][30][31] have shown that radial basis function (RBF) based metamodels are suitable for representation of highly nonlinear responses using relatively small number of training points. In the coupled process-performance FE simulations, it is required to perform deep drawing, springback, and crush simulations in sequence.…”

Section: Multi-level Ooptimization Problemmentioning

confidence: 99%

Multilevel Decomposition and Optimization of Coupled Process-Performance Systems

Najafi¹,

Rais‐Rohani²

2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials ConferenceSelf Cite

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In traditional energy absorption management, the geometric attributes of the structural component are optimized using a fixed set of material properties with the assumption that material behavior is impervious to the manufacturing process used. This paper seeks to extend the product design process by considering the manufacturing process-induced responses to perform concurrent process-performance optimization. This is achieved by treating the manufacturing process and product performance as a hierarchical system that is decomposed and optimized motivated by analytical target cascading methodology. Crush response of a thin-walled tube produced using sheet-stamping process is used to illustrate the approach. The material models considered follow piecewise linear isotropic hardening plasticity law. The coupling between the two levels of hierarchy is established by treating effective plastic strain and springback distortion as coupling variables. Process-performance analyses rely on coupled simulations using Abaqus /Explicit for deep drawing, Abaqus/Standard for springback, and Abaqus /Explicit for crush. Besides describing the design simulation and optimization framework, the results of coupled process-performance optimization of a thin-walled double-hat tube are presented and discussed.

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Section: Multi-level Ooptimization Problemmentioning
confidence: 99%

Multilevel Decomposition and Optimization of Coupled Process-Performance Systems
Najafi¹,
Rais‐Rohani²
2012
53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials ConferenceSelf Cite
0
0
0
0
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“…In addition, Andersson and Redhe optimised the intrusion range and vehicle peak acceleration value with the response surface method (RSM) and multi-objective optimisation method to improve the vehicle crashworthiness [1]. Parrish et al used AZ31 magnesium alloy on 22 auto parts in the simulation to study the vehicle intrusion, acceleration, and internal energy [17]. And optimisation design was carried out based on polynomial response surface, Gaussian process, the radial basis function, Kriging model, and integrated broker model supporting vector regression.…”

Section: Introductionmentioning
confidence: 99%

Crashworthiness optimisation of A-pillar in passenger car in rear-end collision with truck
Yang
¹
,
Cao
²
,
Liu
³

et al. 2016
International Journal of Crashworthiness
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Rear-end collisions between cars and trucks are of great concern to society because of their high casualty rate. Improving the safety of passengers during these collisions is a significant issue. This paper aims to optimise the crashworthiness of the A-pillar area of a car according to the collision form based on the finite-element model of the carÀtruck rear-end collision. Through the optimisation process, the value and speed of the intrusion into the A-pillar were selected as the evaluation assessment indicators, and the optimisation design was conducted from two viewpoints: the material selection and stiffness match. As a result of the optimisation, the maximum intrusion of the A-pillar of the car was reduced by 33.19%, and the intrusion speed was reduced by 46.98% without increasing the body mass of the car. These results indicate that the crashworthiness of the car was improved effectively; thus, the occupant casualty risk was reduced. They suggest a feasible path for the crashworthiness improvements of automobiles for rear-end collisions.

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Crashworthiness Optimization of Vehicle Structures Made of a Lightweight Magnesium Alloy

Cited by 2 publications

References 6 publications

Multilevel Decomposition and Optimization of Coupled Process-Performance Systems

Multilevel Decomposition and Optimization of Coupled Process-Performance Systems

Crashworthiness optimisation of A-pillar in passenger car in rear-end collision with truck

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