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Mechanical behavior of 3D printed syntactic foam composites

机译：3D印刷句法泡沫复合材料的力学行为

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摘要

A three-dimensional printed (3DP), polymer based syntactic foams are developed using hollow glass micro balloons (GMB) dispersed in high density polyethylene (HDPE). This work presents the buckling and vibration response of 3D printed foams subjected to axial compression. The buckling load is estimated using Modified Budiansky Criteria (MBC) and Double Tangent Method (DTM) through the load-deflection plots. The first three natural frequencies and their mode shapes are computed as a function of axial compressive load. It is noted that the natural frequency reduces with an increase in axial compressive load. It is also observed that with an increase in GMB %, the natural frequencies and critical buckling load increases. In mode-1, the natural frequency decreases in pre-buckling regimes and increases exponentially in post-critical loading conditions. Analytical solutions obtained from the Euler-Bernoulli-beam theory are compared with experimental results. It is noted that the fundamental frequency approaches zero when the axial load is equal to the critical load. The critical buckling load is estimated through the vibration correlation technique and compared with the results obtained using DTM and MBC methods. The property map is plotted for buckling load against the density of various composites.
机译：使用分散在高密度聚乙烯（HDPE）中的中空玻璃微球（GMB）开发了三维印刷（3DP），基于聚合物的句法泡沫。这项工作介绍了经受轴向压缩的3D印刷泡沫的屈曲和振动响应。通过载荷偏转图，使用改进的Budiansky标准（MBC）和双切线方法（DTM）估计屈曲负荷。第一三个自然频率及其模式形状被计算为轴向压缩负载的函数。注意，自然频率随着轴向压缩负荷的增加而减小。还观察到，随着GMB％的增加，自然频率和关键屈曲负荷增加。在模式-1中，自然频率在预屈曲的方案中减少并在关键后的负载条件下呈指数级增长。与实验结果进行比较了从Euler-Bernoulli光束理论获得的分析溶液。应注意，当轴向载荷等于临界负载时，基本频率接近零。通过振动相关技术估计关键屈曲负载，并与使用DTM和MBC方法获得的结果进行比较。绘制属性图以抵抗各种复合材料密度的屈曲负荷。

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