Identifying constitutive parameters in engineering and biological materials, particularly those with intricate geometries and mechanical behaviors, remains a longstanding challenge. The recent advent of Physics-Informed Neural Networks (PINNs) offers promising solutions, but current frameworks are often limited to basic constitutive laws and encounter practical constraints when combined with experimental data. In this paper, we introduce a new PINN-based framework designed to identify material parameters for soft materials, specifically those exhibiting complex constitutive behaviors, under large deformation in plane stress conditions. Distinctively, our model emphasizes training PINNs with multi-modal time-dependent experimental datasets consisting of full-field deformation and loading history, ensuring algorithm robustness even amidst noisy data. Our results reveal that our framework can accurately identify constitutive parameters of the incompressible Arruda-Boyce model for samples with intricate geometries, maintaining an error below 5%, even with an experimental noise level of 5%. We believe our framework sets the stage for a transformative approach in modulus identification for complex solids, especially for those with geometrical and constitutive intricate.

基于物理信息神经网络（PINN）的新框架用于识别软材料的本构参数，尤其是在平面应力条件下表现出复杂的本构行为，我们的模型强调使用多模态时变实验数据集训练PINN，确保算法的鲁棒性，即使在嘈杂的数据中，我们的框架仍能准确识别具有复杂几何形状的样品的不可压亚-博伊斯模型的本构参数，保持误差在5%以下。

利用物理信息神经网络识别复杂超弹性固体的本构参数