Investigation of Creep Phenomenon in Metal Matrix Composites with Whiskers

Vahid Monfared

《Research Journal of Applied Sciences, Engineering and Technology》 4卷18期 (2012/09) Pp. 3516-3521

並列摘要

A new mathematical model based on the exponential, logarithmic and polynomial (mixed) functions is presented for determination of some unknowns such as displacement rate in outer surface of unit cell and strain rate of short fiber (whisker) composites with elastic fiber in steady state creep under axial loading. In addition, effective factor or effect coefficient is introduced for determination of creep displacement rate in outer surface. Also, radial, axial displacement rates, equivalent and shear stresses will be determined by new method. Aim of this study is using the mathematical modeling instead of time consuming and costly experimental methods. On the other hand, unknowns are determined by polynomial, exponential and logarithmic functions instead of some theories, simply. These analytical results are then validated by the Finite Element Analysis (FEA). Interestingly, good agreements are found between analytical and numerical predictions for creep strain rate and displacement rate.

並列關鍵字

Composite ； effective factor ； mathematical model ； mixed functions ； steady state creep ； whisker