[email protected]

Comparison of three real time techniques for the

Mar 01, 2005 · With this parameter, a material's fracture toughness can be established by measuring the stress intensity factor at incipient crack initiation. Standards for determining and validating a material's critical stress intensity factor for initiating a quasistatically loaded stationary crack (ASTM E399 [3] ) have made fracture toughness determination routine for structural materials. Determination of dynamic fracture-initiation toughness From the tests and numerical results, it can be concluded that the CMOD procedure, together with the knowledge of the time to fracture determined using crack gages, seems to be the best method for measuring dynamic fracture-initiation toughness. Download to read the full article text

Fracture Mechanics of Metals:Some Features of Crack

The main features are considered concerning the crack initiation and crack propagation events during the fracture toughness measurements at static and dynamic loading with respect to perfectly brittle, quasi-brittle and ductile behavior of material. Measurement of the fracture toughness of a fiber A technique, using the Brazilian disk specimen, for measuring the fracture toughness of unidirectional fiber-reinforced composites, over the entire range of crack-tip mode mixities, was developed. Nonlinear fracture toughness measurement and crack Apr 01, 2018 · The fracture toughness of 2D materials such as graphene (17), h-BN (18), MoS 2 (19), and MoSe 2 (16) has recently been studied using the postulates of

On the quantitative measurement of fracture toughness in

Jan 01, 2010 · OSTI.GOV Conference:On the quantitative measurement of fracture toughness in high explosive and mock materialsStandard Test Method for Measurement of Initiation When a parameter describing this stress state, or constraint, is used with the standard measure of crack-tip stress amplitude (K or J), the resulting two-parameter characterization broadens the ability of fracture mechanics to accurately predict the response of a crack under a wider range of loading. The two-parameter methodology produces a more complete description of the crack-tip conditions at the initiation of crack