- BrittleFracture of any component with little or no macroscopically visible plastic deformation. Brittle fracture usually involves little energy absorption.
- DecohesionSeparation of the pipe and fitting at the weld interface or in the plane of the electrofusion wires.
- Ductile, ductilityFractures characterised by material tearing and plastic deformation such as stretching and elongation.
- Failure ModePattern of failure defined by distinctive features of the deformed shape after failure; manner in which the failure occurs i.e., brittle, ductile or mixed mode.
- FractureSeparation of two halves of the test specimen under the action of stress.
- FusionA process for bonding a polymer by heating and melting two polymer surfaces and pressing the surfaces together. This forms a common over-structure, created by co-crystallisation of the macromolecules beyond the weld interface.
- RuptureRupture, or ductile rupture describes the ultimate failure of ductile materials loaded in tension.
- TearingBreaking apart a material through the application of force without the aid of a cutting tool.
- YieldingBehaviour of a material stressed beyond the elastic limit and exhibiting permanent, inelastic deformation.
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