Ductile Tearing and Its Engineering Assessment

Le résumé fourni par la source

This chapter addresses the engineering assessment of ductile tearing in steel structures, emphasizing the integration of fracture resistance measurements into structural integrity evaluations. Key methodologies discussed include the Failure Assessment Diagram (FAD), widely employed to assess structural integrity by considering the competing failure modes of fracture and plastic collapse, and the recently introduced Tearing Assessment Diagram (TAD), designed to simplify the evaluation of ductile crack propagation. The chapter elaborates on generic and geometry-specific failure assessment curves (FACs), underscoring the limitations of generic approaches when applied to complex welded geometries such as circular hollow section (CHS) X- and K-joints. Through comprehensive FEA, this chapter highlights the influence of geometric parameters, material properties, and crack characteristics on structural integrity assessments, demonstrating the importance of tailored geometry-specific FACs for accurate evaluations. The introduction of TAD provides a unified framework, integrating experimental load-deformation and fracture resistance data into a singular assessment curve, significantly streamlining the assessment of ductile crack extension. Experimental validation and numerical studies presented highlights the accuracy and reliability of both FAD and TAD approaches in predicting ductile tearing behavior, particularly for complex welded joints in structural applications.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.