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Mechanical properties in tensile loading of H13 re-entrant honeycomb auxetic structure manufactured by direct metal deposition

机译:通过直接金属沉积制造的H13凹入蜂窝状拉胀结构的拉伸载荷的力学性能

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摘要

Auxetic materials and structures have a negative Poisson's ratio. When a tensile load is applied, they become thicker in lateral direction and vice versa. This paper presents a study on the mechanical behavior of a metallic re-entrant honeycomb auxetic structure manufactured by laser assisted Direct Metal Deposition (DMD) additive manufacturing technology. Effective modulus of the auxetic structure was estimated in tensile loading. The results of finite element analysis (FEA) were validated experimentally and show good agreement. Poisson's ratio of the given structure was also estimated by FEA and validated with the analytical equation. Results show that direct metal deposition is an effective technique for producing intricate auxetic structures for various engineering applications.
机译:辅助材料和结构的泊松比为负。当施加拉伸载荷时,它们在横向方向上会变厚,反之亦然。本文介绍了一种通过激光辅助直接金属沉积(DMD)增材制造技术制造的金属凹角蜂窝状塑性结构的力学行为。在拉伸载荷下估计了膨胀结构的有效模量。实验验证了有限元分析(FEA)的结果,并显示出良好的一致性。给定结构的泊松比也由FEA估算,并用解析方程验证。结果表明,直接金属沉积是一种用于各种工程应用的复杂结构的有效技术。

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