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采用梯度功能材料力学方法,通过改进层合板理论模型来预测材料的力学性能。将饱和掺杂金属原子的外层作为表面镀层,将无掺杂的基体作为中间层,两层之间掺杂的金属原子含量逐渐变化,作为梯度层;使用EDS方法得到了Pt型金属/离子聚合物复合材料(IPMC)沿厚度方向的Pt原子含量分布,证明了模型分层的合理性;采用ASTM标准测定了IPMC材料的拉伸和弯曲弹性性能。本模型采用Mori-Tanaka方法预测表面镀层和梯度层的弹性性能,采用梯度力学方法,最终得到IPMC材料整体的弹性性能。用本文中模型预测常态下和含水饱和态下的IPMC拉伸性能与实验值相比,误差分别为0.69%和-2.05%;预测常态下IPMC的表观弯曲弹性模量与实验值相比,误差为-0.99%。
By using the method of gradient function material mechanics, the mechanical properties of the material are predicted by improving the theoretical model of the laminate. The outer layer of saturated doped metal atoms as the surface coating, the non-doped substrate as the intermediate layer, the two layers doped metal atoms gradually change the content as a gradient layer; using EDS method to obtain a Pt-type metal / ion The distribution of Pt atoms in the thickness direction of the polymer composites (IPMC) proves the rationality of the model stratification. The tensile and flexural elastic properties of the IPMC are measured by ASTM standard. In this model, Mori-Tanaka method is used to predict the elastic properties of the surface coating and the gradient layer. The gradient mechanical method is used to obtain the overall elastic properties of the IPMC. Compared with the experimental results, the errors of the tensile properties of IPMC under normal and water-saturated conditions are 0.69% and -2.05%, respectively. Prediction of apparent flexural elastic modulus of IPMC under normal conditions is in good agreement with the experimental data. The error is -0.99%.