Author: JW. Cardinal
Publisher:
ISBN:
Category : Circumferentially cracked pipes
Languages : en
Pages : 12
Book Description
Elastic-plastic finite-element fracture mechanics analyses were conducted on 102-mm (4-in.) and 406-mm (16-in.)-nominal-diameter Type 304 stainless steel pipes containing circumferential through-wall cracks located in girth welds. The 406-mm (16-in.) pipe was analyzed for a fixed axial load combined with a monotonically increasing bending moment. The 102-mm (4-in.)-diameter pipe analysis was performed under a four-point bending load. Material J-resistance curves appropriate for each problem were used to initiate and grow the initial crack. Calculations were performed to analyze the 406-mm (16-in.) welded pipe treated as (1) a monolithic pipe entirely composed of base metal and (2) a composite of base metal and weldment. The 102-mm (4-in.) welded pipe analysis modeled the material as a composite of base metal and weldment and utilized a material J-resistance curve generated from an elastic-plastic analysis of a welded compact tension specimen. The results of the 406-mm (16-in.)-diameter pipe analysis demonstrated that the predictions of the extent of stable crack growth and the applied load at fracture instability depend on whether or not the pipe is modeled monolithically or as a composite of base metal and weldment. The 102-mm (4-in.) pipe fracture analysis, using a normalized interpretation of the material J-resistance curve, produced good agreement with corresponding experimental crack growth and deflection data.
Stable Crack Growth and Fracture Instability Predictions for Type 304 Stainless Steel Pipes with Girth Weld Cracks
Author: JW. Cardinal
Publisher:
ISBN:
Category : Circumferentially cracked pipes
Languages : en
Pages : 12
Book Description
Elastic-plastic finite-element fracture mechanics analyses were conducted on 102-mm (4-in.) and 406-mm (16-in.)-nominal-diameter Type 304 stainless steel pipes containing circumferential through-wall cracks located in girth welds. The 406-mm (16-in.) pipe was analyzed for a fixed axial load combined with a monotonically increasing bending moment. The 102-mm (4-in.)-diameter pipe analysis was performed under a four-point bending load. Material J-resistance curves appropriate for each problem were used to initiate and grow the initial crack. Calculations were performed to analyze the 406-mm (16-in.) welded pipe treated as (1) a monolithic pipe entirely composed of base metal and (2) a composite of base metal and weldment. The 102-mm (4-in.) welded pipe analysis modeled the material as a composite of base metal and weldment and utilized a material J-resistance curve generated from an elastic-plastic analysis of a welded compact tension specimen. The results of the 406-mm (16-in.)-diameter pipe analysis demonstrated that the predictions of the extent of stable crack growth and the applied load at fracture instability depend on whether or not the pipe is modeled monolithically or as a composite of base metal and weldment. The 102-mm (4-in.) pipe fracture analysis, using a normalized interpretation of the material J-resistance curve, produced good agreement with corresponding experimental crack growth and deflection data.
Publisher:
ISBN:
Category : Circumferentially cracked pipes
Languages : en
Pages : 12
Book Description
Elastic-plastic finite-element fracture mechanics analyses were conducted on 102-mm (4-in.) and 406-mm (16-in.)-nominal-diameter Type 304 stainless steel pipes containing circumferential through-wall cracks located in girth welds. The 406-mm (16-in.) pipe was analyzed for a fixed axial load combined with a monotonically increasing bending moment. The 102-mm (4-in.)-diameter pipe analysis was performed under a four-point bending load. Material J-resistance curves appropriate for each problem were used to initiate and grow the initial crack. Calculations were performed to analyze the 406-mm (16-in.) welded pipe treated as (1) a monolithic pipe entirely composed of base metal and (2) a composite of base metal and weldment. The 102-mm (4-in.) welded pipe analysis modeled the material as a composite of base metal and weldment and utilized a material J-resistance curve generated from an elastic-plastic analysis of a welded compact tension specimen. The results of the 406-mm (16-in.)-diameter pipe analysis demonstrated that the predictions of the extent of stable crack growth and the applied load at fracture instability depend on whether or not the pipe is modeled monolithically or as a composite of base metal and weldment. The 102-mm (4-in.) pipe fracture analysis, using a normalized interpretation of the material J-resistance curve, produced good agreement with corresponding experimental crack growth and deflection data.
Nonlinear Fracture Mechanics
Author: John D. Landes
Publisher: ASTM International
ISBN: 9780803112582
Category : Technology & Engineering
Languages : en
Pages : 652
Book Description
Publisher: ASTM International
ISBN: 9780803112582
Category : Technology & Engineering
Languages : en
Pages : 652
Book Description
NUREG/CR.
Author: U.S. Nuclear Regulatory Commission
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 112
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 112
Book Description
Energy Research Abstracts
Fracture of Circumferentially Cracked Type 304 Stainless Steel Pipes Under Dynamic Loading
Author: GM. Wilkowski
Publisher:
ISBN:
Category : Dynamic loading
Languages : en
Pages : 20
Book Description
A program of experimentation and analysis aimed at determining fracture instability in circumferentially cracked Type 304 stainless steel pipes in seismic or water-hammer loadings is described. Experimental work on center-cracked tension panels revealed that dynamic loading does not affect the net-section stress criterion evolved previously for Type 304 stainless steel. Full-scale tests on 100-mm-diameter (4 in.) pipes subjected to a dynamic load nevertheless indicate that a margin of safety exists beyond that predicted by the application of the net-section stress criterion. It is concluded that the finite duration of a dynamic loading together with the system compliance which allows stable crack growth beyond maximum load is primarily responsible. A J-based plastic fracture mechanics assessment based upon rate-dependent mechanical and fracture properties of the material was made and found to be consistent with this hypothesis.
Publisher:
ISBN:
Category : Dynamic loading
Languages : en
Pages : 20
Book Description
A program of experimentation and analysis aimed at determining fracture instability in circumferentially cracked Type 304 stainless steel pipes in seismic or water-hammer loadings is described. Experimental work on center-cracked tension panels revealed that dynamic loading does not affect the net-section stress criterion evolved previously for Type 304 stainless steel. Full-scale tests on 100-mm-diameter (4 in.) pipes subjected to a dynamic load nevertheless indicate that a margin of safety exists beyond that predicted by the application of the net-section stress criterion. It is concluded that the finite duration of a dynamic loading together with the system compliance which allows stable crack growth beyond maximum load is primarily responsible. A J-based plastic fracture mechanics assessment based upon rate-dependent mechanical and fracture properties of the material was made and found to be consistent with this hypothesis.
Metals Abstracts
Applied Mechanics Reviews
Pressure Vessel Integrity, 1993
Author: W. E. Pennell
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 312
Book Description