A customized MATLAB algorithm is developed for internally separated laminated composite panels experiencing large geometric deformations. The algorithm is designed to calculate nonlinear deflection responses under the effect of combined hygro-thermo-mechanical (HTM) loading. The hygrothermal (HT) load on the panel is in-plane, whereas the mechanical load acts upon the structure transversely. The analysis has adopted various kinematic theories and finite element (FE) techniques to determine the deformations computationally. The deflection behavior of the composite is characterized through a macro mechanical model considering the nonlinearity in geometry with and without accounting for the stretching effects across the panel thickness. Additionally, the changes in composite properties due to the environment and/or loadings are adopted to achieve a realistic response, preserving continuity assumptions between the individual layers of the weakly bonded structure. Moreover, various numerical examples are examined through different models to illustrate the influences of environmental factors and design-specific parameters on the flexural strength of weakly bonded structures. The findings strongly emphasize the necessity of employing diverse kinematic models when examining laminated structures, both with and without HT loading, while also acknowledging the potential for debonding.

针对经历大几何变形的内部分离层压复合材料板开发了定制的 MATLAB 算法。该算法旨在计算湿热机械 (HTM) 联合载荷作用下的非线性偏转响应。面板上的湿热（HT）载荷是面内的，而机械载荷横向作用在结构上。该分析采用了各种运动学理论和有限元 (FE) 技术来通过计算确定变形。复合材料的偏转行为通过宏观力学模型来表征，该模型考虑了几何形状的非线性，考虑或不考虑跨面板厚度的拉伸效应。此外，采用由于环境和/或载荷而引起的复合材料性能的变化来实现真实的响应，从而保持弱结合结构的各个层之间的连续性假设。此外，通过不同的模型检查了各种数值例子，以说明环境因素和设计特定参数对弱粘结结构的弯曲强度的影响。研究结果强烈强调了在检查层压结构时采用不同运动学模型的必要性，无论是否有高温载荷，同时也承认脱粘的可能性。