Investigation of nonlinear crack tip deformation including the effects of unsymmetric spatial variations of material properties

An extensive investigation of non-uniform material effects on static fracture analyses is undertaken. Included in the study are theoretical, experimental and numerical techniques of focusing attention on the nonsymmetric deformation fields around a crack tip in a non-uniform yield strength varying material. Each analysis independently shows that the material non-uniformities alter stress and strain distributions drastically and that a statically stressed crack can propagate in directions other than the crack axis direction, depending on local conditions at the crack tip. An extremely simple and versatile finite element technique called “Unimod” is developed for use in real material modelling of crack tip material elements.

Name thesis:degree_name

Ph. D.

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Engineering Mechanics

Department dc:contributor.department

Engineering Mechanics

Grantor dc:publisher

Virginia Polytechnic Institute and State University

Year dc:date.issued

1974

Author dc:creator

• Nair, Prasad K.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10919/76177

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/76177