WHAT THE DESIGNER MUST KNOW ABOUT FRACTURE MECHANICS
Traditional design criteria make no attempt to account for the failure mode which is characteristic of a flawed, frangible structure. A design rationale is outlined for brittle and brittle-ductile transition materials which contain flaws caused, for example, by metallurgical inclusions; fabrication and erection overloads, and fatigue cracking. Linear elastic fracture mechanics can be employed successfully for high strength-low toughness materials design. Laboratory test results for critical values of Kc, the stress intensity factor, may be applied to combined load problems by use of the strain-energy-density factor Sc. Design with materials of higher toughness/yield strengh ratios follows essentially the same procedure with a slight modification in interpretation of the fracture toughness parameter. A number of example problems are solved and the results compared with those obtained using the traditional failure criterion.
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American Society of Mechanical EngineersTwo Park Avenue
New York, NY USA 10016-5990
- SIH, G C
- MacDonald, B
- Publication Date: 1973-1
- Features: Figures; References;
- Pagination: 17 p.
- Accession Number: 00050323
- Record Type: Publication
- Source Agency: American Society of Mechanical Engineers
- Report/Paper Numbers: ASME #73-DE-19 Paper
- Files: TRIS
- Created Date: Jan 24 1976 12:00AM