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<p>ISO 29221:2014 specifies a method for the determination of the plane-strain crack-arrest fracture toughness, <i>K</i><sub>la</sub>, 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. ISO 29221:2014 employs a static fracture analysis determination of the stress intensity factor at a short time after crack arrest. The estimate is denoted as <i>K</i><sub>a</sub> and when certain size requirements are met, the test result provides an estimate, termed as <i>K</i><sub>la</sub>, 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. </p>
Reģistrācijas numurs (WIID)
45354
Darbības sfēra
<p>ISO 29221:2014 specifies a method for the determination of the plane-strain crack-arrest fracture toughness, <i>K</i><sub>la</sub>, 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. ISO 29221:2014 employs a static fracture analysis determination of the stress intensity factor at a short time after crack arrest. The estimate is denoted as <i>K</i><sub>a</sub> and when certain size requirements are met, the test result provides an estimate, termed as <i>K</i><sub>la</sub>, 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. </p>
