Multi-objective robust optimization of foam-filled bionic thin-walled structures

Yin, Hanfeng; Xiao, Youye; Wen, Guilin; Gan, Nianfei; Chen, Can; Dai, Jinle

doi:10.1016/j.tws.2016.10.011

Cited by 46 publications

(17 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(1) Aluminum Foam. e hardening equation of aluminum foam [26] is a function of yield stress, plateau stress, and equivalent strain, which can be expressed as follows:…”

Section: Materials Modelingmentioning

confidence: 99%

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Luo

Liu

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

High-speed penetrators carrying detection equipment impact planetary bodies at high speeds, and they are therefore buried at depths of up to several meters beneath the surface. During the friction and collision with the crust of the planet, the acceleration of the scientific instrumentation is significantly large. The vibration protection structure for scientific instrumentation is necessary for the reduction of the peak value of the acceleration response and the improvement of the survival rate. In this study, a penetrator with a multilayered energy absorbing structure was developed to improve the survival rate of the penetrator, of which the foam-filled thin-walled structure (FTS) was applied to the penetrating vibration-damping structure. The penetration process of the penetrator into the planetary medium was simulated using the LS-DYNA software platform. The results obtained using empirical formulas and theoretical derivations were compared with the results of the numerical analysis. The reliability of the penetrator limit element model was then verified by conducting an impulse response experiment and simulation. The results suggest that FTS has a positive influence on the isolation impact and energy absorption. Moreover, the vibration isolation effects of nine different FTSs were evaluated with respect to the following six factors: impact isolation efficiency, load efficiency, peak of acceleration, peak impact force, total energy absorption, and specific energy absorption. Furthermore, the design of the damping structure provides an indispensable solution for penetrator detection.

show abstract

“…(1) Aluminum Foam. e hardening equation of aluminum foam [26] is a function of yield stress, plateau stress, and equivalent strain, which can be expressed as follows:…”

Section: Materials Modelingmentioning

confidence: 99%

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Luo

Liu

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…In order to comprehensively assess the attenuation effect of LMs, it is necessary to define the evaluation indicators. Refer to the crashworthiness indicators studied in previous thin-wall crashworthiness researches [44,45], the similar impact force attenuation indexes for LMs are proposed in this paper. These concepts include the peak impact force (PIF) and the mitigation impact force (MIF).…”

Section: The Mitigation Indicators Of Impact Forcementioning

confidence: 99%

Design and optimization of three-resonator locally resonant metamaterial for impact force mitigation

et al. 2018

Smart Mater. Struct.

View full text Add to dashboard Cite

Locally resonant metamaterials (LMs) have received extensive attention for their extraordinary physical properties, while less study on their application in the field of collision exists. In this paper, we extend the application of LMs to field of structural collision and achieve the mitigation of impact force based on their negative effective mass property. We also propose a three-resonator metamaterial (TRM) to enhance the attenuation effect of impact stress waves. Based on the theoretical analysis, the width of the negative effective mass frequency regions of TRM is wider than those of single-resonator metamaterial (SRM) and dual-resonator metamaterial (DRM). In numerical cases, the superior performance of TRM is also validated based on the impact wave model and the non-convex multi-corner thin-walled column crash model compared with SRM and DRM. The multi-objective optimization analyses are also conducted to enhance the performance of TRM with high impact force mitigation, great improvement of vehicle crashworthiness and small LMs mass.

show abstract

“…The BFGS quasi-Newton's method is an optimization method that uses (12) as its search direction. Generally, the positivedefinite symmetric matrix B is preferred to be similar in value to the Hessian matrix ∇ 2 (x ), which satisfies the equation in approximation (13).…”

Section: Treatment Of Constraint Conditions By Penalty Functionmentioning

confidence: 99%

“…Optimization problems, which frequently appear in scientific research and engineering, are often MOPs, particularly in the design of structures [10,11]. Yin et al [12] studied the crashworthiness and reliability of a foam-filled bionic thin-walled structure based on bioinspired design. The optimization of a vehicle door structure with a hybrid material was investigated to achieve lightweight design [13].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Algorithm for Solving Multiobjective Optimization Problems with Engineering Applications

Fan

Yoshino

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

An effective hybrid algorithm is proposed for solving multiobjective optimization engineering problems with inequality constraints. The weighted sum technique and BFGS quasi-Newton's method are combined to determine a descent search direction for solving multiobjective optimization problems. To improve the computational efficiency and maintain rapid convergence, a cautious BFGS iterative format is utilized to approximate the Hessian matrices of the objective functions instead of evaluating them exactly. The effectiveness of the proposed algorithm is demonstrated through a comparison study, which is based on numerical examples. Meanwhile, we propose an effective multiobjective optimization strategy based on the algorithm in conjunction with the surrogate model method. This proposed strategy has been applied to the crashworthiness design of the primary energy absorption device's crash box structure and front rail under low-speed frontal collision. The optimal results demonstrate that the proposed methodology is promising in solving multiobjective optimization problems in engineering practice.

show abstract

Multi-objective robust optimization of foam-filled bionic thin-walled structures

Cited by 46 publications

References 52 publications

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Design and optimization of three-resonator locally resonant metamaterial for impact force mitigation

A Novel Hybrid Algorithm for Solving Multiobjective Optimization Problems with Engineering Applications

Contact Info

Product

Resources

About