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Abstract

Two-layer pipes made of PE 100 and PPH were chosen for the present study. The PPH pipe provided a protective layer for the PE 100 pipe. The relevant numerical model based on the finite element method (FEM) was used to calculate the stress distribution in the pipe and the corresponding fracture mechanics parameters were estimated. Two crack configurations (inside and outside cracks) were analysed numerically. The influence of the Young modulus of both components on possible crack propagation is discussed. From the experimental point of view, the compact tension (CT), single edge notch bending (SENB) and C shaped (C) specimens taken from the pipe were tested under a static load and at different temperatures. As a fracture parameter the J – integral characteristic and its dependence on stable crack growth, the crack orientation and temperature were chosen. A correlation between the experimental and theoretical results was found.

Keywords

MULTI-LAYER PIPES FRACTURE BEHAVIOUR NUMERICAL MODEL FRACTURE MECHANICS

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Analysis of fracture behaviour of multilayer pipes

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