تأثیر یک شکاف ماتریسی روی انتقال تنش بر فیبر آلومینا در رزین اپوکسی با استفاده از FEA و فوتوالاستیک

Influence of a matrix crack on stress transfer to an a-alumina fibre in epoxy resin using FEA and photoelasticity A.C. Johnson, F.M. Zhao, S.A. Hayes, F.R. Jones *Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, UKReceived 28 February 2005; received in revised form 2 December 2005; accepted 3 December 2005Available online 7 March 2006 AbstractElasto-plastic finite element analysis was used to investigate the influence of a transverse matrix crack on the matrix stress transfer toan isolated alumina fibre in epoxy resin. With an increase in transverse crack length perpendicular to the fibre the stress transfer length ofthe fibre (STL) increased, thereby reducing its reinforcing efficiency. The maximum shear stress at the fibre/matrix interface was found tobe displaced away from the fibre-break.Phase-stepping automated photoelasticity was used to quantify the stress field surrounding the broken fibre in the prese ...

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