BS ISO 29221:2014

This standard BS ISO 29221:2014 Plastics. Determination of mode I plane-strain crack-arrest toughness is classified in these ICS categories:

• 83.080.01 Plastics in general

This International Standard specifies a method for the determination of the plane-strain crack-arrest fracture toughness, K_la, of polymeric materials by using a side-grooved, crack-line-wedge-loaded compact tension specimen to obtain a rapid crack run-arrest segment of flat-tensile separation with a satisfactory crack front. This International Standard employs a static fracture analysis determination of the stress intensity factor at a short time after crack arrest. The estimate is denoted as K_a and when certain size requirements are met, the test result provides an estimate, termed as K_la, of the plane-strain crack-arrest toughness of the polymer. The specimen size requirements provide for in-plane dimensions large enough to allow the specimen to be modelled by linear elastic analysis. If the specimen does not exhibit rapid crack propagation and arrest, K_a cannot be determined.