tailieunhanh - Mô hình hóa và mô phỏng sự lan truyền vết nứt trong vật liệu trực hướng bằng phương pháp trường pha

Bài viết Mô hình hóa và mô phỏng sự lan truyền vết nứt trong vật liệu trực hướng bằng phương pháp trường pha mô tả phương pháp trường pha mô phỏng hư hỏng trong vật liệu trực hướng; Giới thiệu và phân tích một vài ví dụ mô phỏng để chỉ ra khả năng áp dụng của phương pháp này với vật liệu nêu trên. | Transport and Communications Science Journal Vol 73 Issue 6 08 2022 614-629 Transport and Communications Science Journal MODELING AND SIMULATION OF CRACK PROPAGATION IN ORTHOTROPIC MATERIALS BY THE PHASE FIELD METHOD Vu Ba Thanh Nguyen Xuan Lam University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 18 05 2022 Revised 21 06 2022 Accepted 01 07 2022 Published online 15 08 2022 https Corresponding author Email nxlam@ Abstract. Nowadays the orthotropic material is commonly used to reinforce the bridge structures as well as the car body shells because the strength and stiffness is high while the weight is small. In this paper we use phase field method to simulate the damage and crack propagation direction of this material through two types of epoxy resin-based materials containing parallel fiber reinforcement of carbon Carbon-epoxy and or glass Glass-epoxy . This material has only three axes of symmetry and orthogonality in which the material properties along the fiber axis are much stronger than the ones along the other two axes. The phase field method in this study is supplemented with some new points such as i an orientation tensor has been used to represent the damage development of the fiber direction in the material. This orientation tensor is added to the phase field method to predict the initiation and propagation of the crack in the aforementioned materials ii a form of strain tensor decomposition satisfying the orthogonal condition is applied into the simulation method to improve the accuracy of the material behaviour. Through several numerical examples the obtained results have been compared with the relevant experimental and analytical ones to demonstrate the effectiveness of the proposed method in predicting the damage of the orthotropic material. Keywords phase field method orthotropic materials orientation tensor damage crack propagation strain .