INDENTER METHOD FOR DETERMINING LOCKED IN TENSILE STRESS.
BROWN ENGINEERING CO INC HUNTSVILLE ALA
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A simple, quick, and feasible method of detecting the presence of locked in stresses in members with limited access is presented. The test consists of making an indentation in the metal surface and photographing the indentation at close range. Dimensions of the indentation reveal the locked in stress when loads are not applied or the total stress upon application of load. Actual observations on the hold down arms for SATURN S-IC are given as an illustration. Author