Planform effects upon the bistable response of cross-ply composite shells
Planform effects upon the bistable response of cross-ply composite shells
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DOI：
10.1016/j.compositesa.2011.03.012
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发表时间：
2011-07-01
影响因子：
8.7
通讯作者：
Armanios, Erian
中科院分区：
文献类型：
--
作者：
Tawfik, Samer A.;Dancila, D. Stefan;Armanios, Erian
本研究旨在探讨不对称交叉层合板在固化过程中因热致应力而产生的双稳态特性。双稳特性的研究重点是几何形状的变化，即矩形，梯形和三角形的一个子集。为此，对这些几何形状进行了系统的研究，得出了一组建立双稳态行为所需值的无量纲参数。设计了一种新的装置来测量通断和回断所需的力的大小。通过使用气垫进行无摩擦运动，将测试板支撑处的摩擦影响降至最低。使用ABAQUS （TM）代码的基于非线性有限元方法的预测通过与测试数据的比较进行了验证。Elsevier Ltd.出版。
This research aims at investigating the bistable characteristics of unsymmetric cross-ply laminates resulting from thermally induced stresses while curing. The bistable characteristics are examined with a focus on the change in geometry for a subset of configurations, namely, rectangular, trapezoidal and triangular. To this end, these geometries are systematically investigated leading to a set of non-dimensional parameters establishing the values required for bistable behavior. A new apparatus is designed to measure the magnitude of the force required for snap-through and snap-back. The influence of friction at the supports of the tested panels is minimized by utilizing air cushion for frictionless motion. Predictions from a nonlinear finite element based methodology using the ABAQUS (TM) code are validated through comparisons with test data. Published by Elsevier Ltd.