Abstract
Matrix failure in composite structures has not been widely presented in literature. Their failure has often been overlooked due to focus directed at fiber failure. With increasing attention on progressive damage models for composite structures it is important that matrix failure is well understood as this is often the characteristic of initial failure in these advanced materials. In this paper the authors perform several four point bend tests on a typical stacking sequence used in composite structures [-45/0/45/90]2S. Inspection techniques involving a FLIR thermal camera are used to detect matrix failure. Two methods are then employed to establish a suitable failure criterion to predict matrix failure. The first compares several failure criteria at the lamina level, whilst the second uses micromechanical analysis to predict matrix failure. It was found that matrix failure was poorly predicted at the lamina level, whilst a hybrid failure criterion incorporating the 1st Stress Invariant and Drucker-Prager failure criterion at the micromechanical level gave a much better prediction. The proposed hybrid failure criterion can be used in various progressive damage models to give a better prediction of initial failure in composite structures.
| Original language | English |
|---|---|
| Pages (from-to) | 148-158 |
| Number of pages | 11 |
| Journal | Composite Structures |
| Volume | 137 |
| DOIs | |
| Publication status | Published - 1 Mar 2016 |
Keywords
- Matrix failure
- Composites
- Four-point bending test
- Truncation
- Failure envelope
Cite this
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Predicting matrix failure in composite structures using a hybrid failure criterion. / Chowdhury, Nayeem Tawqir; Wang, John; Chiu, Wing Kong; Yan, Wenyi.
In: Composite Structures, Vol. 137, 01.03.2016, p. 148-158.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Predicting matrix failure in composite structures using a hybrid failure criterion
AU - Chowdhury, Nayeem Tawqir
AU - Wang, John
AU - Chiu, Wing Kong
AU - Yan, Wenyi
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Matrix failure in composite structures has not been widely presented in literature. Their failure has often been overlooked due to focus directed at fiber failure. With increasing attention on progressive damage models for composite structures it is important that matrix failure is well understood as this is often the characteristic of initial failure in these advanced materials. In this paper the authors perform several four point bend tests on a typical stacking sequence used in composite structures [-45/0/45/90]2S. Inspection techniques involving a FLIR thermal camera are used to detect matrix failure. Two methods are then employed to establish a suitable failure criterion to predict matrix failure. The first compares several failure criteria at the lamina level, whilst the second uses micromechanical analysis to predict matrix failure. It was found that matrix failure was poorly predicted at the lamina level, whilst a hybrid failure criterion incorporating the 1st Stress Invariant and Drucker-Prager failure criterion at the micromechanical level gave a much better prediction. The proposed hybrid failure criterion can be used in various progressive damage models to give a better prediction of initial failure in composite structures.
AB - Matrix failure in composite structures has not been widely presented in literature. Their failure has often been overlooked due to focus directed at fiber failure. With increasing attention on progressive damage models for composite structures it is important that matrix failure is well understood as this is often the characteristic of initial failure in these advanced materials. In this paper the authors perform several four point bend tests on a typical stacking sequence used in composite structures [-45/0/45/90]2S. Inspection techniques involving a FLIR thermal camera are used to detect matrix failure. Two methods are then employed to establish a suitable failure criterion to predict matrix failure. The first compares several failure criteria at the lamina level, whilst the second uses micromechanical analysis to predict matrix failure. It was found that matrix failure was poorly predicted at the lamina level, whilst a hybrid failure criterion incorporating the 1st Stress Invariant and Drucker-Prager failure criterion at the micromechanical level gave a much better prediction. The proposed hybrid failure criterion can be used in various progressive damage models to give a better prediction of initial failure in composite structures.
KW - Matrix failure
KW - Composites
KW - Four-point bending test
KW - Truncation
KW - Failure envelope
UR - http://www.scopus.com/inward/record.url?scp=84948440216&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2015.11.019
DO - 10.1016/j.compstruct.2015.11.019
M3 - Article
VL - 137
SP - 148
EP - 158
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -