EFFECT OF FOUR STRESS CONCENTRATORS OVER THE MECHANICAL PROPERTIES OF INJECTED PLASTIC PARTS

摘要

The principal objective of this work was to study the influence of different stress concentrators (triangle, rectangle, medium circle and circle) over the mechanical properties of injected plastic parts. Simulations of the injection molding and the tensile test of plaques made of High Impact Polystyrene (HIPS) were made, using CAD/CAE tools. The curves of stress concentrator (Kt) factor in relationship with the stress concentrator type and the geometric parameter d/D were made. The Kt factor is dependent of the geometric parameters and the stress concentrator used.