Summary
The development of crazes of linear amorphous polymers competes with the occurrence of general yielding in the plastic zone in tensile deformation. For toughened semi-ductile linear amorphous polymers, general yielding in the plastic zone is suppressed by the development of crazes. This suppresion prevents the crack tip from being blunt. Therefore it is recommended that the blunting line be neglected for the evaluation of Jic. For semi-ductile linear amorphous polymers, general yielding in the plastic zone takes place and blunts the crack tip. Thus the blunting line cannot be neglected for the evaluation of Jic.
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Tung, IC. On the J-intergral blunting line applied to linear amorphous polymers. Polymer Bulletin 25, 253–255 (1991). https://doi.org/10.1007/BF00310800
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DOI: https://doi.org/10.1007/BF00310800