AI 中文总结
本文提出一种基于Kirchhoff-Love的结构单元新方法，采用结构内聚单元与精确罚刚度恢复复合材料层合板面外应力，解决薄壳单元无法计算该应力导致损伤预测不准确的问题。
AI 中文摘要
基于Kirchhoff-Love假设的薄壳单元仅能计算三个应力分量：面内正应力和面内切应力，而传统三维损伤准则所需的面外应力分量无法获取，导致复合材料层合板的损伤萌生无法准确预测。本文提出一种基于Kirchhoff-Love的任意铺层多层结构单元自由边效应捕捉方法，该方法采用结构内聚单元模拟复合材料层合板，并使用从层合板富树脂层推导得到的精确罚刚度，通过准确表征界面力学响应，可恢复面外应力分量。
英文摘要
Thin shell elements based on the Kirchhoff-Love hypothesis account for only three stress components: the in-plane normal stresses and the in-plane shear stress. The out-of-plane stress components required by conventional three-dimensional damage criteria are unavailable. As a result, damage initiation in composite laminates cannot be accurately predicted. This paper presents a method for capturing free edge effects in multilayer structural elements with arbitrary composite layups based on the Kirchhoff-Love hypothesis.The proposed formulation employs structural cohesive elements to model composite laminates and uses an accurate penalty stiffness derived from the laminate's resin-rich layers. By accurately characterizing the interfacial mechanical response, out-of-plane stress components can be recovered.
Comments33 pages,26 figures
