Plastics. Determination of mode I plane-strain crack-arrest toughness
This International Standard specifies a method for the determination of the plane-strain crack-arrest fracture toughness, Kla, 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 Ka and when certain size requirements are met, the test result provides an estimate, termed as Kla, 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, Ka cannot be determined.
| SDO | BSI: British Standards Institution |
| Document Number | ISO 29221 |
| Publication Date | Jan. 31, 2014 |
| Language | en - English |
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| Supercedes | |
| Committee | PRI/21 |
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