BS EN 2155-21:1989 Specification for test methods for transparent materials for aircraft glazing - Determination of resistance to crack propagation (K factor)
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S EN 2155-21:1989 is a European Standard that provides specifications for test methods used to assess the resistance to crack propagation, specifically in transparent materials utilized for aircraft glazing. The test method outlined in this standard aims to determine the crack propagation resistance, often denoted by the "K factor," which is a critical characteristic for materials used in aerospace applications.
The K factor is a measure of a material's resistance to crack propagation under specific conditions, which is crucial for ensuring the structural integrity and safety of aircraft components such as windows and windshields.
BS EN 2155-21:1989 Specification for test methods for transparent materials for aircraft glazing - Determination of resistance to crack propagation (K factor)