Analysis of Steady State Creep in Short Fiber Composites (SFC) by Polynomial Function (PF) and Boundary Condition Method (BCM)

Two novel mathematical models based on polynomial function (PF) and boundary condition method (BCM) are presented for determination of shear stress in interface in steady state creep in short fiber composites under axial loading. Important novelty of this research is determination of shear stress in interface without using of shear lag and imaginary fiber technique (IFT) theories. In these approaches, determination of shear stress in interface by polynomial function (PF) and boundary condition method (BCM)are easier and more comfortable than the previous analytical methods, . Determination of shear stresses in interface in steady state creep in short fiber composites are very important for design of composites. Analysis of shear stress in interface are used for investigation of failure, fracture and fatigue in short fiber composites in steady state creep. Finally, good agreements are found between these two methods and previous analytical and numerical predictions for behaviour of steady state creep in short fiber composites.