Fracture Extension Resistance of Aluminum Alloys in Thin Sections.

摘要

The Dynamic Tear (DT) test was developed to characterize the fracture resistance properties of structural metals over the entire range of strength and fracture properties. Ratio Analysis Diagram (RAD) procedures based on use of the DT test have been developed as a framework for determining the significance of fracture resistance data in terms of structural design papameters. However,DT test methods have been used primarily for thick-section materials (1.0in. and thicker);hence no standard method for measuring fracture properties of thin-section ductile materials presently exists. This report is concerned with the extension of DT test methods to include thin-section materials in the RAD analysis system. The test materials were four thin-section aluminum alloys. A technique of laminating specimens was developed to prevent specimen buckling. Methods for comparing thin-section material properties to previously established data for aluminum alloys in thicker sections on the RAD format are also discussed. (Author)