Accession Number:

AD0262203

Title:

A MODEL FOR THE EFFECT OF THICKNESS ON FRACTURE TOUGHNESS

Descriptive Note:

Corporate Author:

WATERTOWN ARSENAL LABS MASS

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

A simple model of the fracture phenomenon in sheet is suggested based essentially upon the assumption that the shear lip formation is a volume sensitive mechanism whereas flat fracture is essentially a surface phenomenon. A critical shear lip width is hypothesized this concept is substantiated and is shown to lead to the variations in shear lip width with thicknesses that are experimentally observed. Furthermore, the fracture toughness-thickness relationship constructed by the simple linear superposition of the above two fracture mechanisms predicts identically the observed fracture toughness. A numerical illustration indicates the use of test results to calculate the G sub c versus t curve for a given temperature over the entire range of thicknesses. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE