Journal
POLYMERS
Volume 12, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/polym12092162
Keywords
carbon; epoxy composite; moisture absorption; Fickian; delamination; fracture toughness; cohesive zone modeling
Categories
Funding
- Universiti Teknologi Malaysia [09G16, 01M01]
- Ministry of Education, Youth, and Sports of the Czech Republic
- European Union (European Structural and Investment Funds Operational Program Research, Development, and Education) [CZ.02.1.01/0.0/0.0/16_025/0007293]
- Institute for Nanomaterials, Advanced Technologies and Innovations (CXI), Technical University of Liberec (TUL)
Ask authors/readers for more resources
It is necessary to consider the influence of moisture damage on the interlaminar fracture toughness for composite structures that are used for outdoor applications. However, the studies on the progressive variation of the fracture toughness as a function of moisture contentM(%) is rather limited. In this regard, this study focuses on the characterization of mode II delamination of carbon/epoxy composites conditioned at 70 degrees C/85% relative humidity (RH). End-notched flexure test is conducted for specimens aged at various moisture absorption levels. Experimental results reveal that mode II fracture toughness degrades with the moisture content, with a maximum of 23% decrement. A residual property model is used to predict the variation of the fracture toughness with the moisture content. Through numerical simulations, it is found that the approaches used to estimate the lamina and cohesive properties are suitable to obtain reliable simulation results. In addition, the damage initiation is noticed during the early loading stage; however, the complete damage is only observed when the numerical peak load is achieved. Results from the present research could serve as guidelines to predict the residual properties and simulate the mode II delamination behavior under moisture attack.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available