Fiber push-out study of a copper matrix composite with an engineered interface: Experiments and cohesive element simulation

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:46

Article

You, J. -H.¹  Lutz, W.²  Gerger, H.³  Siddiq, A.³  Brendel, A.¹  Hoeschen, C.¹  Schmauder, S.³ 

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

[2] Robert Bosch GmbH, SG EPT, D-70442 Stuttgart, Germany

[3] Univ Stuttgart, Inst Mat Testing Mat Sci & Strength Mat, D-70569 Stuttgart, Germany

关键词: Fiber push-out test;    Cohesive zone model;    Fiber-reinforced copper matrix composite;    Finite element simulation;    Interface debonding;    Traction-separation law;   

DOI  :  10.1016/j.ijsolstr.2009.08.021

来源: Elsevier

【 摘 要 】

The fiber push-out test is a basic method to probe the mechanical properties of the fiber/matrix interface of fiber-reinforced metal matrix composites. In order to estimate the interfacial properties, parameters should be calibrated using the measured load-displacement data and theoretical models. In the case of a soft matrix composite, the possible plastic yield of the matrix has to be considered for the calibration. Since the conventional shear lag models are based on elastic behavior, a detailed assessment of the plastic effect is needed for accurate calibration. In this paper, experimental and simulation studies are presented regarding the effect of matrix plasticity on the push-out behavior of a copper matrix composite with strong interface bonding. Microscopic images exhibited significant local plastic deformation near the fibers leading to salient nonlinear response in the global load-displacement curve. For comparison, uncoated interface with no chemical bonding was also examined where the nonlinearity was not observed. A progressive FEM simulation was conducted for a complete push-out process using the cohesive zone model and inverse fitting. Excellent coincidence was achieved with the measured push-out curve. The predicted results confirmed the experimental observations. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

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