SEDL / STP / STP612-EB / STP27881S

Nonlinear Analysis of a Tapered Disk Thermal Fatigue Specimen

Mowbray, DF
Manager, Mechanics of Materials Unit, and Manager, Component Analysis and Test Unit, Materials and Processes Laboratory, General Electric Co., Schenectady, N. Y.

McConnelee, JE
Manager, Mechanics of Materials Unit, and Manager, Component Analysis and Test Unit, Materials and Processes Laboratory, General Electric Co., Schenectady, N. Y.

Pages: 20    Published: Jan 1976

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Abstract

Calculations of the stress-strain response of a common tapered disk thermal fatigue specimen are presented. The calculations were made by complete nonlinear finite element solution and by a simpler method employing the elastic strain-invariance principle. The results are used to show the effect of several common test variables on the resulting stress-strain response, to assess the effect of various material behavior and structural analysis assumptions on the stress-strain response, and to explore the application of several high-temperature fatigue damage prediction methods to transient thermal fatigue loading.