Dynamic response of slender multilayer sandwich beams with metal foam cores subjected to low-velocity impact
Dynamic response of slender multilayer sandwich beams with metal foam cores subjected to low-velocity impact
复制标题
低速冲击下泡沫金属芯细长多层夹层梁的动态响应
DOI：
10.1016/j.compstruct.2016.06.059
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发表时间：
2016
影响因子：
6.3
通讯作者：
T.J. Wang
中科院分区：
文献类型：
--
作者：
Jianxun Zhang;Qinghua Qin;Chunping Xiang;T.J. Wang
多层夹层板是一种具有实际工程应用潜力的新型轻量化结构。研究了全夹紧细长泡沫金属芯多层夹层梁在低速重质量作用下的动力响应。基于多层金属夹层截面的屈服准则，导出了考虑大挠度引起的弯曲和拉伸相互作用的全夹紧细长夹层梁大挠度的解析解和解析解的“界”。数值计算表明，解析解与数值结果吻合较好。当打击器与梁的质量比足够大时，动力解接近准静态解。在给定的低速冲击抗力条件下，利用解析公式，构造了多层夹层梁质量最小的优化设计图。结果表明，动态解和准静态解可以捕捉到全夹紧细长多层夹层梁的低速大质量冲击响应。
Multilayer sandwich panel is a new potential lightweight structure in practical engineering applications. Dynamic response of fully clamped slender metal foam core multilayer sandwich beams struck by a low-velocity heavy mass is investigated. Based on the yield criteria for the multilayer metal sandwich cross-sections, analytical solutions and ‘bounds’ of analytical solutions for large deflection of the fully clamped slender sandwich beams are derived, in which interaction of bending and stretching induced by large deflections is considered. Numerical calculations are carried out and good agreement is achieved between the analytical solutions and numerical results. The dynamic solution approaches the quasi-static one when the mass ratio of the striker to the beam is large enough. Using the analytical formulae, optimal design charts are constructed to minimize the mass of multilayer sandwich beams for a given low-velocity impact resistance. It is shown that the dynamic and quasi-static solutions can capture the low-velocity heavy-mass impact response of fully clamped slender multilayer sandwich beams.