This paper concerns the non-linear morphing behavior of composite laminate for creating asymmetric bi-stability in the symmetric geometry. The hexagonal and compound trapezoidal-hexagonal geometry are the proposed solution to create asymmetric bi-stability as new geometries. By creating asymmetric bi-stability, the strain energy of the two stable states will be different. This difference prevents continuous actuating between stable states and helps to obtain effectively control in the morphing process. The effects of laminate stacking sequence, temperature, and geometry on the strain energy and out of plane displacements of the two stable states are investigated. The non-linear finite element method is used for simulation, and the numerical results are validated with the experiments. Using hexagonal geometry allows the creation of tessellated surfaces consisting of the bi-stable and mono-stable sections that can be deformed in different directions and can be used in the adaptive structures such as reflector antenna or control surfaces.

本文涉及用于在对称几何中创建非对称双稳定性的复合材料层压板的非线性变形行为。六边形和复合梯形六边形几何形状是为创建不对称双稳定性作为新几何形状而提出的解决方案。通过产生不对称的双稳定性，两个稳态的应变能将不同。这种差异会阻止稳定状态之间的连续致动，并有助于在变形过程中获得有效的控制。研究了层压板堆叠顺序，温度和几何形状对两种稳定状态的应变能和平面外位移的影响。用非线性有限元方法进行了仿真，并通过实验验证了数值结果。