Auxetic structures exhibit negative Poisson’s ratios based on the deflection characteristics of the macrostructural forms generated by integrating specific base units. Considering the advantages of the abnormal metamaterial behavior, auxetic structures attained considerable research attention. While theoretical predictions indicate the possibilities to achieve very high auxetic responses, practical implementation and experimental validation were limited due to the difficulties in manufacturing the complex structural forms. Practical realization of true auxetic structural solutions attained a great impetus with the advent of the additive manufacturing solutions, opening up wider opportunities and renewed interests. The current research is an attempt towards enhancing the auxetic nature of a square grid structure by numerical and experimental methods. Finite element simulations allowed to identify structural changes for improved auxeticity and experimental validation based on selective laser melted structures proved the trends to be true. Experimental results based on the fabricated structure indicate the Poisson’s ratio to be − 7.

基于通过集成特定基本单元生成的宏观结构形式的挠曲特性，辅助结构表现出负的泊松比。考虑到异常的超材料行为的优点，膨胀结构得到了相当大的研究关注。尽管理论预测表明有可能实现很高的拉力响应，但由于制造复杂的结构形式存在困难，实际应用和实验验证受到限制。增材制造解决方案的问世，真正实现了真正的结构解决方案获得了极大的推动力，打开了更多的机会，并重新激发了人们的兴趣。当前的研究是试图通过数值和实验方法来增强正方形网格结构的膨胀性。有限元模拟可以识别结构变化以改善发胀性，并且基于选择性激光熔融结构的实验验证证明了这种趋势是正确的。基于制造结构的实验结果表明，泊松比为-7。