An Application of CAP (Computer-Aided Principle) to Structural Design for Vehicle Crash Safety

Natori, Sou; Yu, Qiang

doi:10.4271/2007-01-0882

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…A base design is made of steel with a constant walled thickness of 2 mm. Parts thicknesses are assumed to be the design variables, where XL [1,1,1] and XU [3,3,3] are the lower and upper bounds on the design variables. The load is assumed as an axial impact loading from a 100 kg dropped mass with a 10 m/s pre-impact speed.…”

Section: Optimization Of a Thin Walled Tubementioning

confidence: 99%

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Design Optimization of Thin Walled Structures Under Impact Loading Using the Response Surface Method

Eltaher

2012

The International Conference on Applied Mechanics and Mechanica

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Structural design optimization under impact loading faces two difficulties. First, the inherent complexity of the finite element model required for modeling the complicated physical phenomenon, and second the high computational cost required by the iterative nature of numerical optimization. This paper presents a practical approach for solving this problem by using the response surface method as an approximate model rather than the computationally expensive one. Then numerical optimization can be conducted at an affordable computational cost. Finally, only one simulation analysis is conducted using the initial finite element model to verify the optimum design achieved from numerical optimization. The proposed approach has been successfully applied to the problem of designing a thin walled tube under impact loading which suggests that this approach can be used for solving design optimization problems of other complex structures.

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Section: Optimization Of a Thin Walled Tubementioning

confidence: 99%

“…Considering this, the nonlinear finite element (FE) method required for modeling is highly sophisticated and demands huge calculations. For example, a simulation of full frontal impact of a full vehicle model may last for more than a half day [1].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Thin Walled Structures Under Impact Loading Using the Response Surface Method

Eltaher

2012

The International Conference on Applied Mechanics and Mechanica

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“…However, crash analysis of a large-scale problem such as automobile structures is a complex and highly nonlinear problem requiring enormous computational cost e.g. crash analysis of a full frontal impact can extend for more than half a day even with current computational capabilities [1]. On the other hand, weight reduction is another important factor in vehicle design as it directly affects the amount of fuel consumption and can also adversely affect the vehicle's safety.…”

Section: Introductionmentioning

confidence: 99%

Approximate Models for Crashworthiness Design Optimization

Ibrahim

2010

The International Conference on Applied Mechanics and Mechanica

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Design optimization for crashworthiness improvement is one of the most difficult to solve engineering design problems. The difficulty stems from the extremely high computational cost associated with the highly nonlinear finite element models used for simulating the sophisticated crash behaviour of structural components. This paper presents a practical and an efficient methodology for solving such problems. The methodology combines nonlinear finite element analysis, response surface method, design of experiments and numerical optimization. The methodology is applied to improve the crashworthiness performance of the S-rail, which plays a very important role in absorbing most of the impact energy in frontal collisions. The results demonstrate the capability and potential of this methodology in optimizing the crashworthiness design of vehicle structures.

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“…However, despite the advances in current computational capabilities, crash simulations are computationally very expensive, e.g. a full vehicle frontal impact can take more than half a day even with today's computers' capabilities [1].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Crashworthiness Design Optimization Approach for Frontal Automobile Structures

Kamel

Medraj

2008

Volume 17: Transportation Systems

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Nonlinear finite element simulation is the state of the art tool to assess the crashworthiness performance of current automobile design. Despite all the advancements in today's computational capabilities, simulations are still extremely computationally expensive. Moreover design optimization for crashworthiness is a highly nonlinear mathematical problem in which both analysis and optimization components are nonlinear and involve highly iterative process. This makes design optimization process prohibitively possible due to the associated unrealistic computational cost. This paper presents a practical approach that enables the designer to conduct design optimization for crashworthiness at an affordable computational cost.

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An Application of CAP (Computer-Aided Principle) to Structural Design for Vehicle Crash Safety

Cited by 8 publications

References 3 publications

Design Optimization of Thin Walled Structures Under Impact Loading Using the Response Surface Method

Design Optimization of Thin Walled Structures Under Impact Loading Using the Response Surface Method

Approximate Models for Crashworthiness Design Optimization

An Efficient Crashworthiness Design Optimization Approach for Frontal Automobile Structures

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