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在形状记忆合金的本构模型中，有效复合模量是很重要的因素。
The effective modulus is one of the important parameters of constitutive model for shape memory alloy.
应用参变量变分原理推导了复合模量在弹性及塑性状态下的解析解。
The analytical solutions of composite modulus in both elastic and plastic conditions are deduced by applying parametric variational principle.
结果表明，该方法是合理可行的，其精度较普通复合模量计算方法要高。
The results indicate that this method is rational and feasible, whose accuracy is higher than that of common composite modulus method.
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