Abstract
The present paper investigates the effect of strain rate on different tensile properties of high density polyethylene (HDPE) and polypropylene (PP) composite. Tensile specimens of virgin HDPE-PP composites are prepared via twin screw extruder and injection moulding methods as per ASTM D638-02a (Type-I); with gage length 50 mm, width 13 mm and thickness 3 mm. Composites are fabricated with PP as reinforcing agent at a loading rate of 10%, 20%, 30%, 40% and 50% by weight. Experiments are carried out at room temperature of 23°C and absolute humidity of 54% at a cross head speed of 30, 40, 50, 60 and 70 mm/min. Stress and strain values at yield and break points are reported. Atomic force microscopy (AFM) is used to study the distribution of polymer molecules in the mixture and surface roughness. As in last, experiments are designed by Taguchi optimization method to find out the dominating factors on tensile strength.
Highlights
History reveals, the composites are mainly used for savings in secondary structures
The present paper investigates the effect of strain rate on different tensile properties of high density polyethylene (HDPE) and polypropylene (PP) composite
Bia et al [12] studied the tensile properties of rigid glass bead/HDPE composites at a strain rate of 3 × 10−5 - 8 × 10−3 s−1 and observed tensile modulus and strength increases with loading rate
Summary
The composites are mainly used for savings in secondary structures. The fibre-reinforced polymer (FRP) materials find increasing applications as load bearing structures. In the other hand, development of polymer materials for high technology engineering applications is in demand [1] [2] [3]. It is always a matter of concern, to evaluate the mechanical properties of polymer
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