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Journal of Applied Mechanics and Technical Physics

2022 year, number 2

Feasibility of the (4Оґt, Пѓ22c) Criterion to Predict Fracture Toughness of Ferritic Steel using Specified Specimen Types

J. Pan1,2, Y. Wang2
1Hefei University of Technology, Hefei, 230009, China
2State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, Shenzhen, Guangdong, 518172, China
Keywords: fracture toughness, finite element analysis, (4Оґ, Пѓ) criterion, constraint loss, scaling function

Abstract

An improved Ritchie-Knott-Rice failure criterion, namely (4δt, σ22c) criterion, for the A515-70 steel is studied with allowance for the specimen geometry, specimen temperature, and initial crack length. The results show that the (4δt, σ22c) criterion can effectively predict the cleavage fracture. Results of studying the possibility of using a dimensionless function for determining the fracture toughness are reported.