Fracture-Mechanics-Based Fatigue Life Estimate

by Farrel J. Zwerneman, Oklahoma State Univ, Stillwater, OK, USA,
Karl H. Frank, Oklahoma State Univ, Stillwater, OK, USA,



Document Type: Proceeding Paper

Part of: Materials and Member Behavior

Abstract: Fatigue lives of tee-shaped weldments are estimated using fracture mechanics concepts and crack growth rate data. Fracture mechanics is used to develop an approximate expression for stress intensity at the fillet weld toe in the weldments. The expression for stress intensity at the weld toe is approximated by modifying the solution for the three-point bend specimen and by modifying a solution developed by Newman and Raju. Estimated fatigue lives compare favorably to experimental data.

Subject Headings: Welding | Cracking | Material tests | Fatigue life | Lifeline systems | Fatigue tests

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