NDLI: Flow Stress in a Notched Austenitic Stainless Steel Specimen Under Combined Tension and Bending

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Izawa, Satoru Matsubara, Masaaki
Copyright Year	2010
Abstract	A load history-dependence of tension and bending does not exist in the brittle fracture where linear elastic fracture mechanics is applicable. However, load history-dependency does exist in a plastic collapse load of a member. The load history-dependency of plastic collapse load of a single-edge cracked member subjected to combined tension and bending for accurate structural integrity evaluation was studied in this paper. For this purpose, the authors developed a statically indeterminate fracture mechanics failure testing system, which examines of the load history-dependency of the plastic collapse of the member, by applying an axial force and a bending moment. The plastic constraint factor, the plastic collapse load and the 0.2% proof strength all exceeded the upper bound solution. Therefore, the flow stress is used in place of the plastic collapse load as an effective stress. In general, the flow stress is typically used at the average of the proof stress and the tensile strength. This paper describes the experimental result of the load history-dependency of the flow stress in a single-edge notched specimen test. The experimental result showed the load history-dependency on the flow stress in single-edge notched members subjected to combined tension and bending. A method for evaluating the flow stress from the stress intensity versus displacement chart is also described. The flow stress of the notched ductile materials followed the upper-bound solution regardless of the load history. The effect of the combined loading on the flow stress was considered using both the tangent intersection method with the evaluation chart. A method for evaluating the flow stress from the distribution of plastic collapse load on the upper-bound solution is given. The proposed a method showed that this flow stress is in fairly good agreement with that obtained by the upper-bound solution.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	581
Ending Page	587
Page Count	7
File Format	PDF
ISBN	9780791849224
DOI	10.1115/PVP2010-25359
e-ISBN	9780791838785
Volume Number	ASME 2010 Pressure Vessels and Piping Conference: Volume 3
Conference Proceedings	ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
Language	English
Publisher Date	2010-07-18
Publisher Place	Bellevue, Washington, USA
Access Restriction	Subscribed
Subject Keyword	Collapse Fracture mechanics Stainless steel Brittle fracture Tension Flow (dynamics) Stress Displacement Failure Tensile strength Testing
Content Type	Text
Resource Type	Article

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