Free-edge singularities meet the microstructure: Important considerations |
| |
Authors: | Joshua S. Dustin R. Byron Pipes |
| |
Affiliation: | 1. School of Aeronautics and Astronautics, Purdue University, Neil Armstrong Hall of Engineering, 701 West Stadium Avenue, West Lafayette, IN 47907-2045, United States;2. Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, IN 7907-2100, United States;3. School of Materials Engineering, Purdue University, Neil Armstrong Hall of Engineering, 701 West Stadium Avenue, West Lafayette, IN 47907-2045, United States |
| |
Abstract: | The significance of the free-edge singularities in angle–ply laminates and due to fiber terminations is explored and results are compared to that of a singularity due to the presence of a crack in the same region. A new dimensionless ratio, Δ is defined to compare the intensity of the singularities and the ratio shows that the stress field due to a crack of finite size is approximately twice that generated by free-edge singularities and 1.5 times as intense as the field generated by fiber terminations. For a range of material properties studied, it was found that the free-edge singularity was shown to effectively disappear as the ply angles decrease below ±15° or increase above ±85° and the fiber termination singularity was surprisingly insensitive to material properties. The results of this study suggest that singularities due to cracks dominate the stress field in the free-edge as compared to singularities at lamina discontinuities in equivalent media and fiber terminations. |
| |
Keywords: | B. Defects B. Fracture C. Stress singularities C. Multiscale modeling |
本文献已被 ScienceDirect 等数据库收录! |
|