As Appeared in EPRI’s Announcing:
March 1991 a new Novetech/EPRI fracture handbook
March 1991 a new Novetech/EPRI fracture handbook
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Copyright © 2008 ZMD Corporation
Ductile Fracture Handbook
The Ductile Fracture Handbook was jointly developed by EPRI and Novetech Corporation.
Representing 12 years of research, this single-source document contains elastic-plastic fracture
mechanics formulas to evaluate cracks in pressure vessels, piping, and piping components. The
handbook is a three-volume set.
• Volume 1, published in 1989, presents solutions for circumferential throughwall cracks; it
contains Chapter 1 of the handbook.
• Volume 2 contains Chapters 2 through 6 and presents solutions for circumferential part-
throughwall cracks (three different crack shapes), compound cracks with through-the-wall and
surface components, and axial throughwall cracks.
• Volume 3 contains Chapters 7 through 14 and presents solutions for axial part-throughwall
cracks; cracks in elbows, tees, and nozzles; latest flaw evaluation procedures for piping and pressure
vessels; materials data; and bibliography.
This handbook was developed for engineers concerned with safety, reliability, and plant life extension
of com¬ponents in energy-related systems, including nuclear and fossil power plants; aerospace,
offshore, and naval structures; transportation systems; pressure vessels; pipelines; and processing
equipment. The handbook also is a good reference source for researchers and educators; the three-
ring binder allows the user to easily include additional material, and the large type, excellent-quality
figures, and computer graphs make this docu¬ment easy to read.
This handbook provides fracture mechanics formulas for evaluating the stress intensity factor, J-
integral, limit load, tearing modulus, and pipe displacement. Where practical, it also provides
formulas for crack-opening displacement and area, and formulas to obtain fracture resistance from
pipe tests. The formulas generally cover tension, bending, arbitrary stress distribution, pressure, and
combined loads. These solutions can be used to compute the allowable flaw size and allowable
loads. The handbook also includes latest solutions used in Code-type flaw evaluation for piping and
pressure vessels with low upper-shelf material toughness.
The Ductile Fracture Handbook presents many new solutions and significant expansion of previous
solutions. These include recently developed J-integral estimation solutions for semi-elliptical and
constant-depth part-throughwall flaws; solutions for tees, elbows and nozzles; and solutions for Code-
type structural integrity assessments. In addition, the expansion of solutions includes increased
informa¬tion relative to flaw length and depth, load types, load combination, and material properties.
In general, the solutions are presented in analytical, graphic, and tabular form. This presentation
eliminates the interpolation and extrapolation needed in applying the previously limited solutions, and
should produce more efficient and accurate analyses.
The solutions can be applied with various computational methods currently used for evaluation of
flawed structures. These methods include J-integral and tearing modulus, R-6, deformation plasticity
failure assessment diagram (DPFAD), crack-opening displacement (COD), and linear elastic fracture
mechanics.
_______________
Ductile Fracture Handbook by A. Zahoor
Volume 1 NP-6301-D, V1 (EPRI); N14-1 (Novetech)
Volume 2 NP-6301-D, V2 (EPRI); N14-2 (Novetech)
Volume 3 NP-6301-D, V3 (EPRI); N14-3 (Novetech)
The Ductile Fracture Handbook was jointly developed by EPRI and Novetech Corporation.
Representing 12 years of research, this single-source document contains elastic-plastic fracture
mechanics formulas to evaluate cracks in pressure vessels, piping, and piping components. The
handbook is a three-volume set.
• Volume 1, published in 1989, presents solutions for circumferential throughwall cracks; it
contains Chapter 1 of the handbook.
• Volume 2 contains Chapters 2 through 6 and presents solutions for circumferential part-
throughwall cracks (three different crack shapes), compound cracks with through-the-wall and
surface components, and axial throughwall cracks.
• Volume 3 contains Chapters 7 through 14 and presents solutions for axial part-throughwall
cracks; cracks in elbows, tees, and nozzles; latest flaw evaluation procedures for piping and pressure
vessels; materials data; and bibliography.
This handbook was developed for engineers concerned with safety, reliability, and plant life extension
of com¬ponents in energy-related systems, including nuclear and fossil power plants; aerospace,
offshore, and naval structures; transportation systems; pressure vessels; pipelines; and processing
equipment. The handbook also is a good reference source for researchers and educators; the three-
ring binder allows the user to easily include additional material, and the large type, excellent-quality
figures, and computer graphs make this docu¬ment easy to read.
This handbook provides fracture mechanics formulas for evaluating the stress intensity factor, J-
integral, limit load, tearing modulus, and pipe displacement. Where practical, it also provides
formulas for crack-opening displacement and area, and formulas to obtain fracture resistance from
pipe tests. The formulas generally cover tension, bending, arbitrary stress distribution, pressure, and
combined loads. These solutions can be used to compute the allowable flaw size and allowable
loads. The handbook also includes latest solutions used in Code-type flaw evaluation for piping and
pressure vessels with low upper-shelf material toughness.
The Ductile Fracture Handbook presents many new solutions and significant expansion of previous
solutions. These include recently developed J-integral estimation solutions for semi-elliptical and
constant-depth part-throughwall flaws; solutions for tees, elbows and nozzles; and solutions for Code-
type structural integrity assessments. In addition, the expansion of solutions includes increased
informa¬tion relative to flaw length and depth, load types, load combination, and material properties.
In general, the solutions are presented in analytical, graphic, and tabular form. This presentation
eliminates the interpolation and extrapolation needed in applying the previously limited solutions, and
should produce more efficient and accurate analyses.
The solutions can be applied with various computational methods currently used for evaluation of
flawed structures. These methods include J-integral and tearing modulus, R-6, deformation plasticity
failure assessment diagram (DPFAD), crack-opening displacement (COD), and linear elastic fracture
mechanics.
_______________
Ductile Fracture Handbook by A. Zahoor
Volume 1 NP-6301-D, V1 (EPRI); N14-1 (Novetech)
Volume 2 NP-6301-D, V2 (EPRI); N14-2 (Novetech)
Volume 3 NP-6301-D, V3 (EPRI); N14-3 (Novetech)
The information on Ductile Fracture Handbook is provided for archival
purposes. For further questions on the Handbook, please contact EPRI.
purposes. For further questions on the Handbook, please contact EPRI.