Accession Number : ADA308516

Title :   Stable Crack Propagation in a Viscoelastic Strip.

Descriptive Note : Contract rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Mueller, Hans-Karl

PDF Url : ADA308516

Report Date : MAR 1969

Pagination or Media Count : 146

Abstract : A crack of length 2a which propagates with small, constant speed through a viscoelastic strip of width 2b is considered. The stress on the line of crack advancement and the shape of the crack surface are calculated for a state of plane stress. The relevant material properties are discussed and presented for a Polyurethane rubber (Solithane 113 - 50/50). The results of the material characterization are used to calculate the crack speed as a function of applied strain and temperature. Good agreement is found to exist between theory and experiment.

Descriptors :   *VISCOELASTICITY, *RUBBER, *CRACK PROPAGATION, *POLYURETHANE RESINS, VELOCITY, STRESS STRAIN RELATIONS, STRESS ANALYSIS, POLYMERS, CRACKING(FRACTURING), DISPLACEMENT, MODULUS OF ELASTICITY, THESES, STRAIN(MECHANICS), STRAIN RATE, BOUNDARY VALUE PROBLEMS, CREEP, FAILURE(MECHANICS), ENERGY CONSERVATION, PLANE WAVES, POISSON RATIO, TOLUENES.

Subject Categories : Elastomers and Rubber
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE