On energy balance criteria in ductile fracture

✍ Scribed by Kerry S. Havner; James B. Glassco

• Book ID: 104658633
• Publisher: Springer Netherlands
• Year: 1966
• Tongue: English
• Weight: 628 KB
• Volume: 2
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00193689

✦ Synopsis

This paper is concerned with a formulation and statement of energy balance criteria during slow crack growth and at inception of catastrophic rupture in relatively high strength ductile metals. The phenomena of necking in a tensile test and sIow crack growth in a uniaxially loaded, transversely cracked sheet are taken as models for a general, conceptual analysis. The various mechanistic criteria of crack instability that have been suggested are critically evaluated, in light of recent experimental data, through simple mathematical-physical examples. A more general energy balance criterion for ductile fracture is proposed which is consistant with experimental observations and which reduces to the classical Griffith theory (both conceptually and mathematically) in the case of purely elastic, brittle fracture.