FEM Simulation of Polycarbonate Alloys-made Sheet under a Drop Weight Impact Test: Deformation and Failure Performances
Abstract: This paper presents
a study of deformation and failure performances of a plastic sheet made of
polymer alloys subjected to drop weight impact of a cylindrical mass with
hemispherical tip at a certain velocity by using dynamic explicit finite
element code of MSC. Dytran. An available material model in the finite element
system, called piecewise linear plasticity, was applied in the simulation for
describing the large strain, non-linear behavior of the polymeric materials.
Maximum plastic strain failure criterion was used to simulate the impact failure.
In the simulation, the mass served as a rigid surface strikes perpendicularly
the potential impact region of an arbitrary designed- plastic sheet that was
considered in the form of a fully-clamped circular thin plate. Contact between
the mass and plate was applied and friction coefficient μ between the mass and plate was assumed to
be a constant value of 0.3. In order to study effect of the assumed friction
coefficient value, additional simulations of the impact test have been
performed using μ = 0. Some limitations
in the use of the material model were illustrated through the analysis of
results from two types of tough polycarbonate (PC) alloys: PC/ABS and PC/PBT
blends. Impact force-displacement relationships of each alloy were then
compared to the test result.
Author: M. Nizar Machmud,
Zahrul Fuadi
Journal Code: jptmesingg130002
