Local Stresses・Strains in Welds with Particular Reference to Weld Cracking

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概要

• 論文の詳細を見る

• Initiation and growth of crack in welded joint are influenced by local stresses-strains associated with weld thermal cycles. Recent development of FFM (finite element method) computer analysis enables us to calculate the local stresses and strains. In the present report, attention is paid to the quantitative evaluation of local stresses and thermal strains in the vicinity of welds with particular reference to initiation and growth of crack from weld defects. Studies are made both on local stresses-strains in the vicinity of root of welds and on residual stresses and thermal strains in the vicinity of a pre-existing weld crack by successive welding. At first a two-dimensional FEM analysis is carried out for obtaining local stresses at the root of butt welded joint under various conditions of groove shape, plate thickness and throat depth. The susceptibility to cold cracking under various crack controlling parameters is discussed based on the calculated results of the local stresses. Secondly, an analytical study on thermal strain cycle, especially in the vinicity of pre-existing weld defects, is carried out based on the results of a thermo-elastoplastic analysis by the finite element method. Fracture mechanics approach is tried to make assessment of significance of elastic residual stresses and metallurgical variables of the material due to welding.

• 社団法人溶接学会の論文

著者

• Toyoda Masao

  Osaka Univrersity

• Terasaki Toshio

  Osaka Univrersity

• TOYODA Masao

  Welding Engineering Department, Osaka University

• TERASAKI Toshio

  Welding Engineering Department, Osaka University

• SATOH Kunihiko

  Welding Engineering Department, Osaka University

• Satoh Kunihiko

  Osaka Univrersity

• Satoh Kunihiko

  Welding Engineering Department Osaka University

• Satoh Kunihiko

  Welding Engineering Department Of Osaka University

• Terasaki Toshio

  Welding Engineering Department Osaka University

関連論文

• 125 EMPIRIC STUDY TO RELATE THE RRC- AND TRC-TESTS WITH THE IMPLANT TEST ON MECHANICAL BASIS
• Local Stresses・Strains in Welds with Particular Reference to Weld Cracking
• Relationship between Critical Stress of HAZ Cracking and Residual Diffusible Hydrogen Content
• Static Tensile Properties of Welded Joints including Soft Interlayer
• Mechanical Behaviors of Welded Plates Including a Soft Interlayer under Tension Parallel to a Weld Line
• Static Strength of Welded Plates Including Soft Interlayer under Tension across a Weld Line
• A Method of Measuring Triaxial Residual Stress in Heavy Section Butt Weldments
• Thermal Stresses Developed in High-Strength Steels Subjected to Thermal Cycles Simulating Weld Heat-Affected Zone
• Transient Thermal Stresses of Weld Heat-Affected Zone by Both-Ends-Fixed Bar Analogy

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