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A modified
shear-lag model for prediction of stress distribution in
unidirectional fibrous composites considering interphase
Mohammad Hassan Zare and Mehdi Mondali |
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Vol. 14 (2019), No. 1, 97–117
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Abstract |
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A modified shear-lag model is developed for unidirectional fibrous composites by considering the interphase region subjected to axial loading. A perfect bond at the fiber/interphase and interphase/matrix interfaces is assumed. The fiber, interphase, and matrix materials behave elastically during the analysis. The axial and shear stresses in fiber, interphase and matrix are analytically obtained as functions of the radial and axial directions using a micromechanical approach in a full-continuum model. The composite axial displacement and composite elastic modulus also are obtained. In order to consider the effect of inhomogeneity of the interphase in the three-phase micromechanics model, the elastic modulus of the interphase is assumed to vary with the radial coordinate. Two case studies, a carbon nanotube-reinforced polymer composite and an aramid fiber-reinforced rubber composite are used to validate the results of the model. The results predicted by the proposed analytical approach exhibited good agreement with the finite element results and available experimental measurements. |
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Keywords
modified shear-lag model, unidirectional fibrous
composites, interphase region, FEM
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Milestones
Received: 26 September 2018
Revised: 9 March 2019
Accepted: 14 March 2019
Published: 7 April 2019
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Authors |
| Mohammad Hassan Zare | |
| Department of Mechanical
Engineering, Science and Research Branch Islamic Azad University Tehran Iran |
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| Mehdi Mondali | |
| Department of Mechanical
Engineering, Science and Research Branch Islamic Azad University Tehran Iran |
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