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Volume 16, Issue 1, 2007
LETTER: COMPUTER SIMULATION OF THERMAL RESIDUAL STRESS OF CARBON FIBRE/PPESK COMPOSITE
Chun Lu1, Ping Chen2,*, Baijie Yu3
1Center for Composite Materials, Shenyang Institute of Aeronautical Engineering, Shenyang, Liaoning, China 110034
2 State Key Laboratory of Materials Modification by Beams, School of chemical engineering, Dalian University of Technology, Dalian, Liaoning, China 116012
3 Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning, China 116024
* Author to whom correspondence should be addressed
Received 18 November 2006; accepted 4 December 2006
ABSTRACT
A 3-D FEA technique was employed to analyze the thermal stress distribution in a carbon fibre/PPESK composite. The zone close to the free surface and to the inner zone were examined, and the parabolic failure criterion was used to predict the potential failure zone of the composite. The obtained results indicated that the maximum residual stress on the fibre surface was located at the fibre/matrix interface with the longest distance between the fibres and the maximum matrix residual stress was located at the composite inner zone with the closest distance between the fibres. The potential failure mechanism in the free-end zone was fibre/matrix interfacial de-bonding, while the potential failure mechanism in the inner zone was matrix cracking. |
