Use this URL to cite or link to this record in EThOS:
Title: Crack propagation in isotropic materials
Author: Coughlan, Jarmila
ISNI:       0000 0001 3390 2287
Awarding Body: Glamorgan Polytechnic
Current Institution: University of South Wales
Date of Award: 1973
Availability of Full Text:
Access from EThOS:
Access from Institution:
This thesis presents a numerical study of crack propagation in brittle materials. The finite element method using constant strain triangular elements was used. The experimental investigation is based on Gurney and Hunt's quasi-static method of fracture testing. The applicability of the finite element method of analysis to problems of fracture mechanics is demonstrated for the simple cases where a theoretical solution is obtainable. The comparison of both solutions gives good agreement. The effect of test specimen geometry and the effect of halting the crack tip on one side of a symmetrical specimen on stability and the shape of P,u curve is investigated. Numerical P,u curves are produced and compared with those obtained experimentally. A good correlation of results may be seen. The possibility of using an O-section as a fracture toughness specimen is discussed. Determination of the crack path using dV/da energy criterion is shown and the results are verified by experiments using the brittle lacquer technique. Possible future work is discussed in the last chapter.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available