An estimate of the stress-field in an osseous medium having a no-slip interface crack
โ Scribed by J.C. Misra; V.V.T.N. Murty
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 661 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0013-7944
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โฆ Synopsis
Of concern in the present paper is a study of the stress-field in the vicinity of a no-slip interface crack in an osseous medium. The study is based on the use of a mathematical model concerning adhesive fracture mechanics at a bimaterial interface. The solution is motivated by problems in artificial human joints, in which the artificial material forming the articulating surface is connected to bone by a polymeric material, e.g. polymethyl-methacrylate (PMMA). Linear viscoelasticity of bones (in conformity to experimental observations) is accounted for in the analysis. Starting with the differential operator representations of constitutive relations and using integral transform techniques, the problem is reduced to that of finding the solution of a set of coupled integral equations. Quantities of physical interest are obtained numerically by using experimentally determined values of various physical constants involved in the analysis. NOTATION TV stress tensor eti strain tensor u, v displacement components P internal pressure :: 1 potential functions c, material parameters for bone ;( material parameters for PMMA 2: length of the region where adhesion is lost b-d crack-tip region x, 1/1 harmonic functions o, 5, b' dimensionless variables Tlr =2 relaxation times s transform variable
๐ SIMILAR VOLUMES
Experiments have been performed on a series of 2024-T351 Aluminum alloy uniaxiaf, tension specimens loaded under R = 0 conditions to grow a low cycle fatigue crack to a predetermined length. One half of the specimens were given a 33% single pulse overload at the conclusion of the test. All specimens