Abstract
As a new intelligent actuating material, shape memory polymer (SMP) attracts great interests because it deforms under high temperature conditions and can maintain the temporary deformation after unloading under low temperature condition. Currently the tank diaphragm is mainly using metal in the field of aerospace, but it never can be recycled. Instead of traditional diaphragm, a novel reversible diaphragm of shape memory polymer is developed in this work. The overturning and recovery behavior of the SMP diaphragm are analyzed by using nonlinear finite element method to exhibit the advantage of the shape memory material. The parametric effects of the thickness, height, radius of the diaphragm and temperature on overturning performance are investigated. Then an optimization model is established with the objective function of required minimum pressure for completing overturning deformation and the design variables are thickness, height and radius. Optimized SMP diaphragm is obtained under the critical pressure constraints. This research can contribute to the design and application of novel SMP diaphragm.
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