Low-velocity impact and damage process of composite laminates

No Thumbnail Available
Authors
Guan, Zhidong
Yang, Chihdar Charles
Advisors
Issue Date
2002-04
Type
Article
Keywords
Laminated composites , Residual strength , Computational methods , Computer simulation , Continuum mechanics , Correlation methods , Damping , Delamination , Finite element method , Impact testing , Stiffness
Research Projects
Organizational Units
Journal Issue
Citation
Guan, Z., & Yang, C. (2002). Low-velocity impact and damage process of composite laminates. Journal of Composite Materials, 36(7), 851-871. doi:10.1177/0021998302036007512
Abstract

Several important issues regarding damage simulation of composite laminates due to low velocity impact were investigated including contact law, damage initiation and the corresponding change of stiffness, and damping. Continuum damage mechanics was applied to account for the change of mechanical properties of damaged materials. The Hertzian contact law was modified in order to accommodate the serious damage in the plate. A semi-empirical delamination damage criterion was introduced. A finite element program was written in FORTRAN using twenty-noded solid elements with layered structure to analyze the transient dynamic response of composite laminates. In the simulation computations, variable material damping coefficients were applied to the elements according to damage in order to stabilize the computation. Damage in the forms of matrix cracking, delamination, and fiber breakage were included and analyzed. Results including the force history and delamination areas were found to correlate well with the experiments.

Table of Contents
Description
Click on the DOI link to access the article (may not be free).
Publisher
SAGE Publications
Journal
Book Title
Series
Journal of Composite Materials
v. 36 no. 7
PubMed ID
DOI
ISSN
0021-9983
1530-793X (online)
EISSN