ISO/NP 25594

Fibre-reinforced plastic composites — Determination of mode I interlaminar fatigue delamination propagation for unidirectionally reinforced materials

Scope

This International Standard specifies a method for the determination of delamination propagation curves (average delamination increment per cycle da/dN on a logarithmic scale) as a function of applied mode I strain energy release rate GI (or a quantity proportional to (√GI)2, also on a logarithmic scale) for unidirectional fibre-reinforced plastic composites using the Double Cantilever Beam (DCB) specimen and test apparatus. It is applicable to unidirectional carbon-fibre and glass-fibre reinforced thermosets and thermoplastics. The scope is not necessarily limited to these fibres and lay-ups, but for laminates with other types of fibres or lay-ups, no recommendations for specimen dimensions and fibre volume content are currently available.