Title :
A fatigue study of electrical discharge machine (EDM) strain-gage balance materials
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
A fatigue study was undertaken to determine how much the electrical discharge machine (EDM) process affected the fatigue life of balance materials by comparing EDM and regular milling machine samples. Simulation of a typical balance stress configuration was devised for the fatigue testing in order to obtain results more closely related to balance situations. The fatigue testing of the EDM and regular milling machine specimens to date has indicated that the EDM technique does reduce the fatigue life of the balance material 15-5PH steel, the first balance material tested. This conclusion was based on comparisons of the specimens´ fatigue lives with theoretical and manufacturer´s data. Hence, the EDM surface effects are detrimental to the fatigue life of this balance material. Future research areas and approaches are discussed
Keywords :
fatigue testing; spark machining; stainless steel; strain gauges; 15-5PH steel; electrical discharge machine; fatigue testing; milling machine; precipitation hardened stainless steel; strain-gage balance materials; surface effects; Building materials; Fabrication; Fatigue; Life testing; Machining; Materials testing; Metalworking machines; NASA; Stress; Transducers;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1989. ICIASF '89 Record., International Congress on
Conference_Location :
Gottingen
DOI :
10.1109/ICIASF.1989.77703
