Accurate acquisition of the curing process-induced eigenstrain distribution is vital for predicting residual stress of laminated composites. In this work we develop a novel inverse method for full-field PIE reconstruction of laminated composites. We design standard laminates to obtain the PIE of unidirectional and woven lamina which are key ingredients of full-field PIE. Then an inverse model is established to accurately calculate lamina’s PIE from the measured residual middle-plane strain and curvature of standard laminates. Full-field PIE of validation laminates are then reconstructed by the obtained lamina’s PIE. Experimental results are in good agreement with the reconstructed results, verifying the accuracy and effectiveness of our proposed method. Finally, we implement the inverse method in accurately reconstructing full-field PIE of a hybrid laminated composite I-beam. We also observe that the PIE is process dependent, indicating that PIE can be used to evaluate the effect of curing process on residual stress.

准确获取固化过程引起的特征应变分布对于预测层压复合材料的残余应力至关重要。在这项工作中，我们开发了一种用于层合复合材料全场 PIE 重建的新颖反演方法。我们设计标准层合板以获得单向和编织层合板的PIE，这是全场PIE的关键成分。然后建立反演模型，根据测量的标准层合板的残余中面应变和曲率精确计算层合板的PIE。然后通过获得的层板的 PIE 重建验证层板的全场 PIE。实验结果与重建结果非常吻合，验证了我们提出的方法的准确性和有效性。最后，我们实现了逆向方法来精确重建混合叠层复合材料工字梁的全场PIE。我们还观察到 PIE 与工艺相关，这表明 PIE 可用于评估固化工艺对残余应力的影响。