Optimal structures for failure resistance under impact
Optimal structures for failure resistance under impact
复制标题
冲击下抗失效的最佳结构
DOI:
10.1016/j.jmps.2022.105172
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发表时间:
2023
影响因子:
5.3
通讯作者:
Akerson, Andrew
中科院分区:
文献类型:
--
作者:
Akerson, Andrew
The complex physics and numerous failure modes of structural impact creates challenges when designing for impact resistance. While simple geometries of layered material are conventional, advances in 3D printing and additive manufacturing techniques have now made tailored geometries or integrated multi-material structures achievable. Here, we apply gradient-based topology optimization to the design of such structures. We start by constructing a variational model of an elastic–plastic material enriched with gradient phase-field damage, and present a novel method to efficiently compute its transient dynamic time evolution. We consider a finite element discretization with explicit updates for the displacements. The damage field is solved through an augmented Lagrangian formulation, splitting the operator coupling between the nonlinearity and non-locality. Sensitivities over this trajectory are computed through the adjoint method, and we develop a numerical method to solve the resulting adjoint dynamical system. We demonstrate this formulation by studying the optimal design of 2D solid–void structures undergoing blast loading. Then, we explore the trade-offs between strength and toughness in the design of a spall-resistant structure composed of two materials of differing properties undergoing dynamic impact.
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DOI:
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发表时间:
2005
期刊:
影响因子:
--
作者:
A. Mielke
通讯作者:
A. Mielke
DOI:
10.1016/s0045-7825(98)00219-9
发表时间:
1999-04
影响因子:
7.2
作者:
M. Ortiz;L. Stainier
通讯作者:
M. Ortiz;L. Stainier
影响因子:
3.9
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影响因子:
1.7
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1989
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通讯作者:
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