ANALYSIS OF THE MACROSCOPIC INTERFACIAL BEHAVIOUR OF THE FIBRE PULLOUT USING ELASTIC-PLASTIC COHESIVE MODEL

Zhao Yuping; Yuan Hong; Han Jun

doi:10.6052/0459-1879-14-165

Volume 47 Issue 1

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Chinese Journal of Theoretical and Applied Mechanics > 2015 > 47(1): 127-134. > DOI: 10.6052/0459-1879-14-165 CSTR: 32045.14.0459-1879-14-165

Zhao Yuping, Yuan Hong, Han Jun. ANALYSIS OF THE MACROSCOPIC INTERFACIAL BEHAVIOUR OF THE FIBRE PULLOUT USING ELASTIC-PLASTIC COHESIVE MODEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(1): 127-134. DOI: 10.6052/0459-1879-14-165

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ANALYSIS OF THE MACROSCOPIC INTERFACIAL BEHAVIOUR OF THE FIBRE PULLOUT USING ELASTIC-PLASTIC COHESIVE MODEL

1.
MOE Key Laboratory of Disaster Forecast and Control in Engineering, Institute of Applied Mechanics, Jinan University, Guangzhou 510632, China
2. Department of Engineering mechanics, Hunan University of Science and Technology, Xiangtan 411201, China

Funds: The project was supported by the National Natural Science Foundation of China (11032005).

Received Date: June 05, 2014
Revised Date: October 07, 2014

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Abstract

Abstract

A single fibre pullout behavior from polymer matrix was analytically investigated in this paper. The elastic-plastic cohesive zone model was employed to simulate the crack propagation and interfacial failure. The critical fibre embedded length is determined, which distinguishes two pull-out processes from different fibre embedded lengths. There are different interface states during the fibre pull-out process. When the fibre embedded length is shorter than the critical length, the debonding force for the interface is linear relationship to the fibre embedded length; while the debonding force is approximately constant if the fibre embedded length excesses the critical length. The influence of the interfacial parameters on the debonding force is studied. Increasing the interfacial shear strength and the interface fracture toughness, or decreasing the displacement of crack initiation, can raise the debonding force for the interface. Without the interfacial frictional shear stresses after interfacial debonding, the peak load in the pullout force-displacement curve equals the debonding force for the interface. Under the influence of interfacial frictional shear stress, longer fibre embedded length and larger interfacial frictional shear stress lead to the peak load exceeding the debonding force.
- fibre/matrix bond,
- fibre pullout,
- cohesive zone model,
- analytical solutions

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References

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ANALYSIS OF THE MACROSCOPIC INTERFACIAL BEHAVIOUR OF THE FIBRE PULLOUT USING ELASTIC-PLASTIC COHESIVE MODEL