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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

Fracture mechanics-based failure criterion for the tensile strength of wood

Pugel, Anton D. January 1986 (has links)
Thesis (Ph. D.)--Colorado State University, Fort Collins, 1986. / Includes bibliographical references (p. [117]-120).
102

Numerical study of micro-scale damage evolution in time dependent fracture mechanics

Oh, Joonyoung, January 2005 (has links)
Thesis (Ph. D.)--Ohio State University, 2005. / Title from first page of PDF file. Document formatted into pages; contains xvi, 147 p.; also includes graphics Includes bibliographical references (p. 143-147). Available online via OhioLINK's ETD Center
103

Investigation of static and dynamic fracture of orthotropic media by photomechanics

Fuchs, Elizabeth Ann. January 1983 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1983. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 103-123).
104

Spiking in ductile iron

Rodriguez Gonzalez, Federico, January 1968 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1968. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
105

Laboratory scale measurements of rock rupture under impact and explosive impulse loading

Jones, Reginald John, January 1967 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1967. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
106

Damage mechanics model for brittle failure of transversely isotropic solids : finite element implentation /

Kolari, Kari. January 1900 (has links) (PDF)
Thesis (doctoral)--Helsinki University of Technology, 2007. / Includes bibliographical references (p. 181-195). Also available on the World Wide Web.
107

Characterization of transport properties in granitic rock fractures with skins

Garner, Terence Travis, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
108

Preliminary investigation into the cracking of polyurethane /

Theiss, Timothy J. January 1987 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1987. / Vita. Abstract. Includes bibliographical references (leaves 71-73). Also available via the Internet.
109

Finite element analysis of propagating interface cracks in composites /

Aminpour, Mohammad Ali. January 1986 (has links)
Thesis (Ph. D.)--University of Washington, 1986. / Vita. Bibliography: leaves [104]-109.
110

Elements with penalized equilibrium and rotational degrees of freedom in fracture mechanics problems

De Klerk, Antoinette 17 April 2007 (has links)
This thesis deals with the solution of linear elastic fracture mechanics problems. To solve the linear elastic fracture mechanics problems, the finite element method and path independent integrals are employed, namely Rice's J integral and an alternative path independent integral I *, which is the energy complement to J. Stress intensity factors for typical mode I and mode II fracture mechanics problems in isotropic and orthotropic elastic plates are calculated. The problems considered are a center cracked panel subjected to uniform tension, a single edge cracked panel subjected to uniform tension, a double edge cracked panel subjected to uniform tension, and a center cracked panel subjected to uniform shear. Firstly, classical displacement based finite elements, elements with penalized equilibrium and elements with drilling degrees of freedom are presented and implemented in a MATLAB environment. Secondly, two different ways to evaluate the stress intensity factor are considered, namely the displacement extrapolation approach, and the path independent integrals J and I *. The numerical implementation and path independence of the J and I * integral is demonstrated. It is shown that the J integral can estimate the lower bound of the stress intensity factor when used with displacement based finite elements, while the I * integral can estimate the upper bound of the stress intensity factor, when used with stress equilibrium elements. Thirdly, the path independent integrals J and I * are applied to isotropic fracture mechanics problems to determine the stress intensity factor at the tip of a crack. Convergence studies are presented to investigate the influence of mesh refinement on the stress intensity factor predicted using the J and I * integral. The path independence of J and I * are investigated. Numerical results for typical fracture specimens are presented and discussed. Finally, the path independent integrals J and I * are applied to orthotropic fracture mechanics problems to determine the stress intensity factor at the crack tip. Again, convergence studies are done, and the path independence of J and I * are investigated for orthotropic problems. Numerical results for typical fracture specimens are presented and discussed. The effect of the degree of anisotropy and fiber orientation on the stress intensity factor is also demonstrated. A novel contribution in this thesis are the results for elements with drilling degrees of freedom in fracture mechanics problems. In addition, the results presented here may serve to clarify published stress intensity factor results for orthotropic materials presented in the literature, since many of the results previously presented are contradictory. / Dissertation (MEng(Mechanical))--University of Pretoria, 2007. / Mechanical and Aeronautical Engineering / unrestricted

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