Toughness & Crack Growth
Plastic Pipes Conference Association # 2001 Munich
Whittle,Burford, Hoffmann
A series of modified PVC pipes, with different concentrations of chlorinated polyethylene, were manufactured under carefully controlled processing conditions. The strength and toughness of each pipe was measured by a variety of methods including uniaxial tensile strength, notched C-ring, essential work of fracture, strain energy release rate, fracture toughness, and impact resistance by various techniques. All of the quantitative measures of toughness and strength suggest the existence of an approximately linear relationship with modifier concentration over the range tested. For pipe of the dimensions used in this study, the yield strength is over-estimated when determined via the net section stress on the notched C-ring.
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