IIW Recommendations on HFMI Treatment
For Improving the Fatigue Strength of Welded Joints
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Beschreibung
This second edition presents a substantially expanded and refined set of IIW Recommendations, delivering updated and clarified design rules supported by extensive new data for engineers working with HFMI‑treated welded joints. It introduces relaxed weld‑geometry requirements prior to treatment, revised thickness‑correction factors consistent with the 2024 IIW Fatigue Design Guidelines, and greatly enlarged tables covering fatigue strength across material grades, load ratios, stress ranges, and assessment methods. The scope has been broadened to include steels with yield strengths up to 1300 MPa, alongside refined limits for variable‑amplitude loading. New chapters provide guidance on retrofitting and life‑extension of existing structures, as well as methodologies for assessing HFMI devices based on experimental evidence. With clearer procedures, expanded applicability, and rigorously updated technical content, this edition serves as a comprehensive, practice‑oriented reference for the design, verification, and upgrading of welded structures using HFMI treatment.
This second edition presents a substantially expanded and refined set of IIW Recommendations, delivering updated and clarified design rules supported by extensive new data for engineers working with HFMI‑treated welded joints. It introduces relaxed weld‑geometry requirements prior to treatment, revised thickness‑correction factors consistent with the 2024 IIW Fatigue Design Guidelines, and greatly enlarged tables covering fatigue strength across material grades, load ratios, stress ranges, and assessment methods. The scope has been broadened to include steels with yield strengths up to 1300 MPa, alongside refined limits for variable‑amplitude loading. New chapters provide guidance on retrofitting and life‑extension of existing structures, as well as methodologies for assessing HFMI devices based on experimental evidence. With clearer procedures, expanded applicability, and rigorously updated technical content, this edition serves as a comprehensive, practice‑oriented reference for the design, verification, and upgrading of welded structures using HFMI treatment.
Broadened applicability with validated fatigue‑design rules for steels to 1300 MPa and refined variable‑amplitude limits Significantly expanded and modernized design rules, with a comprehensive new dataset for HFMI‑treated welded joints New guidance on retrofitting and on evaluating HFMI devices, with life‑extension strategies for existing structures
Autor*in
Gary B. Marquis
Themen in »IIW Recommendations on HFMI Treatment«
High Frequency Mechanical Impact HFMI welded structures quality assurance measures fatigue life assessment nominal stress structural hot spot stress effective notch stress HFMI-treated high-strength steels high mean stress fatigue variable amplitude loading low cycle fatigue