Title page for ETD etd-11152013-040441


Type of Document Master's Thesis
Author Bhatia, Sanjay
URN etd-11152013-040441
Title Software tools for computer-controlled fatigue testing
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Charles E. Nunnally Committee Co-Chair
Norman E. Dowling Committee Co-Chair
William Luse Committee Member
Keywords
  • Materials
Date of Defense 1986-09-05
Availability restricted
Abstract

Past efforts at implementing Load Spectrum Generation and Neuber Control have centered around minicomputers and analog circuits. The use of a personal computer to implement the tasks is presented. On implementation of the load Spectrum Generation software, the response of the Materials Testing System was investigated for distortion and attenuation. In particular, the effect of the resolution of the waveform on the test system response was noted. There was negligible attenuation for full scale frequencies of up to 20 Hz. Greater waveform resolution was required at lower frequencies than at higher frequencies. On implementation of the Neuber Control program, the accuracy obtained at the Neuber hyperbolas was noted. Better accuracy was obtained at ramp frequencies below 0.1 Hz.

Based on the results obtained after implementing the Load Spectrum Generator program and the Neuber Control program, the performance of the personal computer in controlling fatigue tests is evaluated. Cost effectiveness and versatility favor the use of a personal computer for the control of fatigue tests.

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