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Wide Panel Testing Technique for Evaluating Repair Weld StrengthsThis paper describes a new tensile testing technique for evaluating the overall effect of a repair weld on the strength of a welded joint. Previously, repair weld strengths have been evaluated using one-inch width tensile specimens, but this technique does not capture all of the effects that result from a repair. The new technique involves testing of "wide panel" tensile specimens which contain the full length of a repair weld within a longer initial weld, allowing the specimen to capture the combined effects of residual stresses, local strength degradation, and load redistribution around a repair. The development of strains in the repair area of standard aluminum alloy specimens and new high-performance aluminum-lithium alloy specimens was observed and evaluated using photoelastic material. The results of this evaluation show an increased sensitivity to repair welding residual stresses in the aluminum-lithium alloy specimens.
Document ID
19990084056
Document Type
Reprint (Version printed in journal)
Authors
Rogers, Patrick R. (NASA Marshall Space Flight Center Huntsville, AL United States)
Bynum, Julian E. (NASA Marshall Space Flight Center Huntsville, AL United States)
Shah, Sandeep R. (Lockheed Martin Space Mission Systems and Services Houston, TX United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Structural Mechanics
Distribution Limits
Public
Copyright
Other