Multiobjective reliability-based optimization for crashworthy structures coupled with metal forming process

Sun, Guangyong; Zhang, Huile; Wang, Ruoyu; Lv, Xin; Li, Qing

doi:10.1007/s00158-017-1825-y

Cited by 48 publications

(13 citation statements)

References 44 publications

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“…42 By ensuring that there is a connection between the outer and inner walls of the multi-cell cross section, a stable fold condition is induced with a narrow force fluctuation range. 52 This is an important feature to have for a crash rail as this configuration helps reduce the likelihood of fracture under these load conditions, which was demonstrated by Sun et al 41,49 and Omer et al 57 via quasi-static and dynamic tests. Thus, it can be deduced by this alone that an increase in the number of corners (or more regions capable of large plastic deformation) holds the potential to vastly improve crashworthiness.…”

Section: Cross-sectional Designsmentioning

confidence: 94%

“…As mentioned, many studies have been conducted upon multi-cell extrusions, primarily with aluminum extrusions. A swarm optimization had been conducted by Fang et al to obtain a cross-sectional design of a longitudinal rail, this constraint driven algorithm highlighted the trend of the material being pushed toward 40 Y N N N Sun et al 41 Y N N N Fang et al 42 Y N N N Ito et al 43 N/A N/A N/A Y Lee and Park 44 P N P N Gao et al 45 Y Y N N Qiu et al 46 Y Y N N Noversa and Peixinho 47 Y N N N Asanjarani et al 38 Y N N N An et al 48 Y N Y N Sun et al 49 Y N N N Reddy et al 35 Y N N N Kamran et al 50 Y N N N Hou et al 51 Y N N N Ma et al 52 Y N N N Zaidi et al 53 N N Y Y Zhu et al 54 Y Y Y N Kohar et al 55 Y N N N Kohar et al 56 Y N N N Omer et al 57 Y N N N Schlosser et al 58 N N Y N Li et al 59 Y N N N Sun et al 60 Y N N N Zahran et al 37 Y N N Y Xu et al 61 Y N N Y Nia and Chahardoli 62 Y N N P Zhang et al 63 Y N N N Reddy et al 64 Y N N N the corners of the member. This had been identified to aid in the increase of energy absorption by inducing more folds under the crush load.…”

Section: Cross-sectional Designsmentioning

confidence: 99%

See 1 more Smart Citation

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

Harrison

Christensen

Bastien

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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With the development and deployment of lightweight vehicles to the market, inclusive of autonomous pods, a review of advanced crashworthy structures and the design methodology has been conducted as it is thought that super-lightweight vehicles may pose significant risk to the occupants if they are involved in a crash. It is suggested that tests should include oblique and multiple velocity impacts to cater for the effects of assisted driving systems of future vehicles. A review of current crash structures and design methodologies revealed that the most recent research do not cater to multiple crash scenarios, nor a shorter crush allowance, therefore resulting in poor crashworthiness performance. In addition, the arbitrary seat positioning shown in autonomous pods’ concepts vastly increases the risk to occupants. Greater enhancements to passive crashworthiness are imperative. To this end, functionally graded vehicle structures should be designed as it has been found that these can provide optimized solutions. Research into nonlinear optimization methods for computationally expensive problems will become central to this.

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Section: Cross-sectional Designsmentioning

confidence: 94%

Section: Cross-sectional Designsmentioning

confidence: 99%

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

Harrison

Christensen

Bastien

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…Recently, the eﬀect of holes as crush initiators on the crashworthiness performance of bi-tubular aluminum profiles is analyzed. 27 In addition, in the design of thin-walled structures, a series of novel optimization algorithms such as size optimization, 28,29 shape optimization, 30,31 topology optimization, 32,33 multi-objective optimization, 18,19 multi-objective reliability-based design optimization, 34,35 and multi-objective robust-based design optimization 14,36 have been proposed. These methods provide a series of powerful tools to design complex engineering structures to satisfy different design requirements.…”

Section: Introductionmentioning

confidence: 99%

An effective topology optimization method for crashworthiness of thin-walled structures using the equivalent linear static loads

Ren

Min

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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The equivalent static loads method for nonlinear dynamic response structural optimization may be failed in large deformation crash conditions, due to topology optimization with the equivalent static loads mostly beyond the linear range and causing numerical defects such as high compliance of elements. To overcome the above disadvantage, an advanced structural topology optimization method for crashworthiness considering crash-reduced large deformation and plastic buckling is proposed using newly defined equivalent linear static loads. The equivalent linear static loads can adaptively scale to guarantee that the topology optimization is performed within linear range. At each cycle, the crash simulation is performed and the nonlinear nodal displacement vector at the time step with the maximum strain energy is scaled by an adaptive displacement-scaling factor. The equivalent linear static loads that are generated by multiplying the linear stiffness matrix and the scaled nodal displacement vector will be incorporated into topology optimization, which can guarantee the topology optimization to remain in linear range and further solve the numerical instability problems. The process is repeated until the convergence criteria are satisfied. The effectiveness of the proposed method is evaluated by solving a crashworthiness topology optimization of a crash box considering crash-induced plastic buckling to determine the location and profile of crash triggers. The results show that the proposed method can effectively solve the large deformation crashworthiness topology optimization of thin-walled structures and provides a feasible strategy for crash triggers design in crash box.

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“…C ONSTRAINED multi-objective optimization problems (CMOPs) exist widely in real-world applications, such as the optimal scheduling of energy storage systems [1], the optimization of biped robot gaits [2] and reliability-based optimization for crashworthy structures [3]. This type of problems involves a simultaneous optimization of multiple and often conflicting objectives, and a set of equality and/or inequality constraints.…”

Section: Introductionmentioning

confidence: 99%

“…3 as an example again, in the second-round of clustering, solutions 2 and 8-10 are associated with λ 2 , and solutions 5-7 are associated with λ 4 . Since both the two new clusters have more than one solution, we can identify the best solution within each of the clusters to form the second layer L 2 = {2, 5}, with the assumption that the solutions 2 and 5 are selected from C 2 and C 4 , respectively 3 .…”

mentioning

confidence: 99%

Handling Constrained Multi-objective Optimization By Ignoring Constraints and Using Two Evolutionary Frameworks

Xiang¹,

Yang²,

Huang³

et al. 2020

Preprint

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Constrained multi-objective optimization problems exist widely in real-world applications, and they involve a simultaneous optimization of multiple and often conflicting objectives subject to several equality and/or inequality constraints. To deal with these problems, a crucial issue is how to handle constraints effectively. This paper proposes a simple yet effective constrained decomposition-based multi-objective evolutionary algorithm. In the proposal, the evolutionary process is divided into two stages in which constraints are handled differently. In the first stage, constraints are totally ignored and the population is pulled toward the unconstrained Pareto-optimal front (PF) by optimizing objectives only. This can help the proposed algorithm handle well problems with the following features, i.e., the constrained PF has an intersection with the unconstrained counterpart, and there are infeasible regions blocking the way of convergence. In the second stage, with the purpose of approximating the constrained PF well,constraint satisfaction is emphasized over objective minimization.Moreover, different evolutionary frameworks are adopted in the two stages to promote the performance of the algorithm as much as possible. The proposed algorithm is comprehensively compared with several state-of-the-art algorithms on 39 problems (with 266 test instances in total), including one real-world problem (with 36 instances) in search-based software engineering. As shown by the experimental results, the new algorithm performs best on the majority of these problems, particularly on those with the aforementioned features. In summary, the suggested algorithm provides an effective way of handling constrained multi-objective optimization problems.

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Multiobjective reliability-based optimization for crashworthy structures coupled with metal forming process

Cited by 48 publications

References 44 publications

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

An effective topology optimization method for crashworthiness of thin-walled structures using the equivalent linear static loads

Handling Constrained Multi-objective Optimization By Ignoring Constraints and Using Two Evolutionary Frameworks

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