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MEASUREMENT OF FRACTURE CHARACTERISTICS OF ADHESIVE POLYMERIC MATERIALS USING SPIRAL CRACKING PATTERN
MEASUREMENT OF FRACTURE CHARACTERISTICS OF ADHESIVE POLYMERIC MATERIALS USING SPIRAL CRACKING PATTERN
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机译:利用螺旋断裂图案测量胶粘高分子材料的断裂特性
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摘要
A method for measuring fracture characteristics of adhesive polymeric material comprises: (i) bonding a sample to a rigid substrate; (ii) cooling the sample from a first temperature to a second temperature such that thermally-induced stresses are generated within the sample, wherein the thermally-induced stresses generate an inward-growing three-dimensional spiral crack within the sample; (iii) detecting, by three or more AE piezoelectric sensors, mechanical transient waves generated during development of the inward-growing three-dimensional spiral crack within the sample and determining the accurate 3D geometry of the spiral using source location technique; (iv) visualizing the two-dimensional spiral cracking pattern deposited on a surface of the rigid substrate and measuring the precise width of the crack; (v) determining, using the detected mechanical waves and the visualized deposited sample, AE-based fracture characteristics of the sample; and (vi) reporting the determined one or more fracture characteristics of the sample.
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