... that the results are qualitative. A new test method is proposed that provides more fundamental and quantitative information about changes occurring in a sealant during durability testing. This test method utilizes a stress relaxation experiment to evaluate the non-linear viscoelastic behavior of sealants...

... as a function of cycle number under hold-time creep-fatigue loading. The Stress Relaxation Model predicted the stress relaxation curve during the hold time of cyclic loading, based on the creep properties of the material. The Interactive Damage Rate Equation predicted the hold-time creep-fatigue life using...

..., fretting had a relatively more detrimental effect on the fatigue performance of Ti-6Al-4V than in the case of IN100. A critical plane-based fatigue crack initiation model, a modified shear stress range parameter, was computed from finite element analysis for two levels of residual surface stress relaxation...

... Reji John,2 and Noel E. Ashbaugh1 Thermal Residual Stress Relaxation in Powder Metal IN100 Superalloy ABSTRACT: Relaxation of shot peen induced compressive residual stresses due to thermal exposure was measured using X-ray diffraction. The material used in this study was a hot isostatically pressed...

... on flat. Measurements by X-ray diffraction method before and after tests showed that residual compressive stress relaxed during fretting fatigue. Fretting fatigue life depended on the amount of stress relaxation as well as on the applied stress range. Elevated temperature induced more residual stress...

...M Li; JF Stubbins Copper alloys are found to experience a stress relaxation during holds at maximum tension and maximum compression during cyclic loading patterns. This stress relaxation response has an effect on fatigue life by reducing the numbers of cycles to failure, particularly in the high...

...AT Wolf; HL Cleland-Host Stress relaxation uniaxial testing is used to define the behavior of elastomeric materials in their functional range. The stress-strain data obtained by this method are used in finite element analysis (FEA) to model the behavior of the material in a given application...