Fatigue Strength at Roots of Cruciform, Tee and Lap Joints : Fracture Mechanics Analysis of Fatigue Strength of Welded Joints, 1st Report

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概要

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• Fatigue tests were carried out on mild steel welded joints that lacked penetration. The joints were cruciform, tee and lap joints. Fatigue crack propagation behavior and the fatigue limit at the root of the joints were observed. Furthermore, the stress intensity factor for each welded joint was calculated by the finite element method. The fatigue crack growth rate and the fatigue limit of each welded joint were well expressed by the fatigue crack characteristics of the weld metal and the maximum principal stress intensity factor of the joint. Preloading by an internal pressurizing method and welding without restraints increased the fatigue strength of the weld metal at joint roots up to three times by generating a compressive stress.

• 社団法人溶接学会の論文

著者

• Usami Saburo

  Hitachi Research Laboratory Hitachi Ltd.

• Kusumoto Sho

  Hitachi Research Laboratory Hitachi Ltd.

関連論文

• Fatigue Limit of Steel with Cracks
• Cyclic Strain and Fatigue Strength at the Toes of Heavy Welded Joint : Fracture Mechanics Analysis of Fatigue Strength of Welded Joints, 3rd Report
• Effects of Crack Length and Flank Angle Size on Fatigue Strength at Toes of Mild Steel Welded Joint : Fracture Mechanics Analysis of Fatigue Strength of Welded Joints, 2nd Report
• Notch Effect in Low-Cycle Fatigue : 1st Report, Low-Cycle Fatigue Strength of 0.48% Carbon Steel under Constant Load Amplitude
• Studies on the Fatigue Crack Initiation and Propagation : Report 1,Effects of Crack Length, Stress Range and Minimum Stress on Fatigue Crack Propagation
• Fatigue Strength at Roots of Cruciform, Tee and Lap Joints : Fracture Mechanics Analysis of Fatigue Strength of Welded Joints, 1st Report

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