✦ LIBER ✦

On the relationship between shear index and energy in dynamic tear specimens

✍ Scribed by J.R Matthews

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 698 KB
Volume: 39
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(91)90028-y

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✦ Synopsis

Comparison of fracture energy and shear index in a series of dynamic tear (DT) tests of quench and tempered carbon and low alloy steels and their weldments has shown that the shear index is related to the fracture energy of the specimens over a wide range of temperatures, compositions and weldment locations. Data have been acquired from samples of HY80, HY 100 and QT28 steels, submerged arc welds of HY80 and HSLASO, gas metal arc welds of HY80 and shielded metal arc welds of HYlOO. NOMENCLATURE maximum width of shear lip (the average of two sides is used in the calculation of shear index) shear index opening mode (2 s/B) crack length critical crack blunting untracked ligament thickness of sample (16 mm) critical plastic zone size plane strain fracture toughness yield strength ultimate strength elastic-plastic fracture toughness dynamic tear energy value flow stress, ((u, + u,)/2) coefficients of polynomial

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