NDLI: Low-Constraint Back-Bend Test of High Strength Steels: Crack Driving Force Calibration

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Liu, Ming Wang, Yong-Yi
Copyright Year	2006
Abstract	It has been well-established that the experimentally measured toughness of materials depends on the crack-tip constraint levels. Accurate assessment of the integrity of real structures requires that the laboratory tests be conducted at similar constraint levels as those experienced by the structures. Conventional laboratory tests are usually designed at high constraint levels to obtain “conservative” toughness values. However, pipelines usually experience low-constraint loads; therefore the assessment results using the conventional laboratory test data can be overly conservative. Back-bend specimen is designed as a low-constraint laboratory test. To obtain the fracture toughness from the test, it is necessary to develop a correlation between the crack driving force, i.e. the crack tip opening displacement (CTOD), and the overall load and displacement. A semi-analytical correlation equation for back-bend tests is presented in this paper. The equation is based on the slip-line theory which was originally developed for rigid-perfectly plastic materials under plane strain conditions. The equation has been extended to take account of the elasticity, yield strength, and strain hardening of the materials. The geometry factors such as the ligament thinning and finite thickness are also investigated. The predicted CTOD driving force by the correlation equation shows a good match with the finite element calculations for a wide range of material properties and specimen dimensions.
Sponsorship	Pipeline Division
Starting Page	503
Ending Page	510
Page Count	8
File Format	PDF
ISBN	0791842630
DOI	10.1115/IPC2006-10414
Volume Number	Volume 3: Materials and Joining; Pipeline Automation and Measurement; Risk and Reliability, Parts A and B
Conference Proceedings	2006 International Pipeline Conference
Language	English
Publisher Date	2006-09-25
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Low-constraint Back-bend Ctod Slip-line fracture mechanics Fracture mechanics Work hardening Pipelines High strength steel Elasticity Dimensions Calibration Fracture (materials) Displacement Stress Fracture toughness Geometry Materials properties Plane strain Yield strength Finite element analysis Plastics
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Applying Gurson Type of Damage Models to Low Constraint Tests of High Strength Steels and Welds

Guide for Recommended Practices to Perform Crack Tip Opening Displacement Tests in High Strength Low Alloy Steels

Crack Arrest Testing of High Strength Steels

The Misconception of Employing CVN Toughness as Key-Measure in Ductile Crack Arrest Prediction for Modern Line-Pipe Steels

Calibration of a Nondestructive Toughness Tester (NDTT) for Measuring Fracture Toughness of Pipeline Steel

Fracture Toughness Evaluation for Welded Joints of High Strength Steel Through CTOD Test

Research on the fracture toughness test methods for high grade pipeline steel

An Interim Approach to Determine Dynamic Ductile Fracture Resistance of Modern High Toughness Pipeline Steels

Estimation Procedures for J and CTOD Fracture Parameters Using Three-Point Bend Specimens

Low-Constraint Back-Bend Test of High Strength Steels: Crack Driving Force Calibration

Similar Documents

Applying Gurson Type of Damage Models to Low Constraint Tests of High Strength Steels and Welds

Guide for Recommended Practices to Perform Crack Tip Opening Displacement Tests in High Strength Low Alloy Steels

Crack Arrest Testing of High Strength Steels

The Misconception of Employing CVN Toughness as Key-Measure in Ductile Crack Arrest Prediction for Modern Line-Pipe Steels

Calibration of a Nondestructive Toughness Tester (NDTT) for Measuring Fracture Toughness of Pipeline Steel

Fracture Toughness Evaluation for Welded Joints of High Strength Steel Through CTOD Test

Research on the fracture toughness test methods for high grade pipeline steel

An Interim Approach to Determine Dynamic Ductile Fracture Resistance of Modern High Toughness Pipeline Steels

Estimation Procedures for J and CTOD Fracture Parameters Using Three-Point Bend Specimens

Low-Constraint Back-Bend Test of High Strength Steels: Crack Driving Force Calibration