Amran Alias

Stress Intensity Factor and Plastic Zone of Auxetic Materials: A Fracture Mechanics Approach to a Chiral Structure Having Negative Poisson's Ratio.

This article summarizes the method of analytical formulation and computational approach of stress intensity factor and plastic zone calculation for auxetic materials, which have negative Poisson’s ratio. A chiral structure-based material is selected as an object of the study due to its popularity. The stress intensity factor is used in combination with the von Mises yielding condition to estimate the plastic zone’s shape and size. The results show that macroscopically the shape of the plastic zone for auxetic material is the same with that of ordinary materials. However, its size is smaller due to the reduction in its Young’s modulus from the solid material of which the auxetic material is made. Microscopically, an auxetic material has its plastic zone shape that is unique to its microstructure. Homogenization theory was convenient to use to bridge between the microscopic and macroscopic models.

Optimum critical buckling of functional graded plates under non-linear temperature by using imperialist competitive algorithm

This paper presents an approach to optimization of critical buckling temperature based on imperialist competitive algorithm (ICA) for functional graded plates (FGP) to non-uniform distributed temperature load. The objective is to maximize the critical temperature capacity of a functional graded plate. The third-order shear deformation theory is used in the mathematical formulation. The numerical results reveal that the imperialist competitive algorithm (ICA) can efficiently minimize critical buckling under non-linear temperature on the FG plates.

Verification of non-uniform heat-conducting interphase by using finite element method

Paper unavailable due to copyright issues.