[논문]Optimization of Composite Laminates Subjected to High Velocity Impact Using a Genetic Algorithm

Nguyen, Khanh-Hung; Ahn, Jeoung-Hee; Kweon, Jin-Hwe; Choi, Jin-Ho

doi:10.5139/ijass.2010.11.3.227

Optimization of Composite Laminates Subjected to High Velocity Impact Using a Genetic Algorithm 원문보기

International journal of aeronautical and space sciences, v.11 no.3, 2010년, pp.227 - 233

Nguyen, Khanh-Hung (Research Center for Aircraft Parts Technology, School of Mechanical and Aerospace Engineering, Gyeongsang National University) , Ahn, Jeoung-Hee (Research Center for Aircraft Parts Technology, School of Mechanical and Aerospace Engineering, Gyeongsang National University) , Kweon, Jin-Hwe (Research Center for Aircraft Parts Technology, School of Mechanical and Aerospace Engineering, Gyeongsang National University) , Choi, Jin-Ho (Research Center for Aircraft Parts Technology, School of Mechanical and Aerospace Engineering, Gyeongsang National University)

Abstract ▼ AI-Helper

In this study, a genetic algorithm was utilized to optimize the stacking sequence of a composite plate subjected to a high velocity impact. The aim is to minimize the maximum backplane displacement of the plate. In the finite element model, we idealized the impactor using solid elements and modeled the composite plate by shell elements to reduce the analysis time. Various tests were carried out to investigate the effect of parameters in the genetic algorithm such as the type of variables, population size, number of discrete variables, and mutation probability.

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제안 방법

We made a finite element model by using shell elements for the composite plate. In addition, we conducted another test using a sequential response surface method for comparison. This is the preliminary result of a project that intends to develop an efficient modeling methodology for high velocity impacts to composite laminates.
Chen (2001) introduced a practical approach for impact structure and crash-worthiness optimization. The approach took advantage of the global-searching ability of genetic algorithms while also considering the instability of explicit finite element analysis. Recently, Yong et al.
In this case, energy absorption and backplane displacement of the helmet are important factors. The current study focuses on the application of a genetic algorithm available in LS-OPT (version 3.3; Livermore Software Technology Corporation) (Stander et al., 2008) to minimize the maximum backplane displacement of a laminated panel subjected to a high velocity impact by optimizing its stacking sequence.
(2008) adopted a genetic algorithm to optimize the response of a composite laminate due to impact. The genetic algorithm was coupled with the explicit finite element package LS DYNA (Livermore Software Technology Corporation, Livermore, CA, USA) to perform the impact analyses.
We used an explicit finite element package, LS DYNA, for the fitness evaluation in the algorithm. We performed several tests with different parameters in order to investigate the effect of population size, variable type, and mutation probability. We carried out an additional test with the sequential response surface method in LS-OPT for comparison.

대상 데이터

The panel had dimensions of 101.6 mm × 152.4 mm and a thickness of 9.5 mm with 19 plies laid up.
Due to the symmetry of the panel and the projectile, a quarter of the panel was generated to reduce the analysis time. The projectile was modeled using solid elements, and the composite panels were generated with shell elements. Material number 59 (MAT #59) in LS DYNA was applied to model the composite plies.

참고문헌 (22)

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원문보기 상세보기
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상세보기
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