An Analytical Model for 3-D Radial and Axial dependent Stress Distribution Field in Short Fiber Composites
محل انتشار: چهاردهمین کنفرانس سالانه مهندسی مکانیک
سال انتشار: 1385
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,169
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شناسه ملی سند علمی:
ISME14_593
تاریخ نمایه سازی: 1 فروردین 1386
چکیده مقاله:
A modified analytical model is developed for 3-D elastic stress field distribution in short fiber composites subjected to an applied axial load. Two sets of exact displacement solutions for the matrix and fiber derived based on the theory of elasticity. The superposition of these two solutions are then used to obtain the analytical expressions for 3-D stress field components over the entire composite system including the fiber end region with the use of imaginary fiber technique. The main difference here is that stress field is considered to be dependent on the radial and axial direction, the fact that has been ignored by previous works. The dependency of the fiber and imaginary fiber stresses and strains to r-direction was calculated. The matrix and fiber 3-D stress field components exactly satisfy the equilibrium and compatibility conditions and also the overall boundary conditions including the surface, the interface continuity, and the axial force equilibrium conditions. The analytical results were then validated by FEM.
Interestingly, good agreements are found between the analytical and numerical predictions for all the stress, strain and displacement components. Another superiority of this analytical model is in solving problems with debonding.
کلیدواژه ها:
Analytical solution- short fibre composites- Radial dependent stress field-FEM modelling
نویسندگان
Pahlavanpour
Department of aerospace engineering, Sharif University of Technology, tehran, Iran
Abedian
Department of aerospace engineering, Sharif University of Technology, tehran, Iran
Mondali
Department of aerospace engineering, Sharif University of Technology, tehran, Iran
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