Response characterization of multistable shallow domes with cosine-curved profile
Response characterization of multistable shallow domes with cosine-curved profile
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DOI：
10.1016/j.tws.2019.03.035
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发表时间：
2019-07-01
影响因子：
6.4
通讯作者：
Burgueno, Rigoberto
中科院分区：
文献类型：
--
作者：
Alturki, Mansour;Burgueno, Rigoberto
本文研究了具有余弦曲线剖面的扁穹顶的多稳态弹性行为。该穹顶具有突跳失稳特性，可作为承受循环荷载和高变形要求的结构的耗能机制的构件。对余弦曲穹顶在顶点集中荷载作用下的几何和材料特性进行了数值模拟和试验研究。通过对3D打印样本进行实验测试验证的有限元分析（FEA），研究了CCD的控制几何和材料特性。根据力-能-位移曲线和应变能-位移曲线，识别并讨论了三种类型的响应。限制的几何参数，治理恢复的原始形状和稳定状态后，负荷去除也确定。此外，经验关系估计的极限点的负载和位移，并描述了通过响应。使用确定的限制的几何参数和开发的关系，从有限元分析和实验测试的结果，观察到良好的一致性。
The multistable elastic behavior of a shallow dome with a cosine-curved profile is investigated in this work. The dome exhibits snap-through instability and could be used as a building block for energy dissipation mechanism in structures subjected to cyclic loading and high deformation demands. Numerical and experimental studies were carried on the geometric and material properties of the cosine-curved domes (CCD) under concentrated load at the apex. Finite element analyses (FEA), validated by experimental tests on 3D printed specimens, were conducted to study the controlling geometric and material properties of the CCD. Three types of response were recognized and discussed based on the force- and strain energy-displacement curves. Limitations on the geometric parameters that govern the recoverability of the original shape and the stability state upon load removal are also identified. In addition, empirical relations to estimate the limit-point load and displacement, and to characterize the snap-through response were developed. Good agreement was observed using the determined limits on the geometric parameters and the developed relations with the results from FEA and experimental tests.