Zappino Enrico, Carrera Erasmo
Mul2 Lab, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, Italy.
Philos Trans A Math Phys Eng Sci. 2023 Jan 9;381(2240):20210218. doi: 10.1098/rsta.2021.0218. Epub 2022 Nov 21.
The present paper presents an innovative numerical model for predicting stress concentrations in composite materials in a multi-physics context. The numerical approach is based on the Carrera unified formulation, a numerical tool able to handle any kinematic model using a unified and compact notation. A general formulation for one-, two- and three-dimensional higher-order models has been presented. Equivalent single-layer and layer-wise models have been considered since they are the most effective in the analysis of composite materials. A hygro-thermo-elastic multi-physics formulation has been considered. The model has been used to investigate stress concentrations considering different configurations. Mechanical, thermal and hygroscopic loads have been considered. An innovative global-local analysis technique has been used to reduce the computational cost preserving the accuracy of the solution. This article is part of the theme issue 'Ageing and durability of composite materials'.
本文提出了一种创新的数值模型，用于预测多物理场环境下复合材料中的应力集中。该数值方法基于卡雷拉统一公式，这是一种能够使用统一且紧凑的符号处理任何运动学模型的数值工具。文中给出了一维、二维和三维高阶模型的通用公式。由于等效单层模型和分层模型在复合材料分析中最为有效，因此对其进行了研究。考虑了湿热弹性多物理场公式。该模型已被用于研究不同构型下的应力集中情况。考虑了机械、热和吸湿载荷。采用了一种创新的全局-局部分析技术来降低计算成本，同时保持解的精度。本文是“复合材料的老化与耐久性”主题专刊的一部分。
