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Sensitivity study of crack driving force predictions in heterogeneous welds using Vickers hardness maps

Sameera Naib UGent, Koen Van Minnebruggen, Wim De Waele and Stijn Hertelé (2016) International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing.
abstract
Weld flaws often require an engineering critical assessment (ECA) to judge on the necessity for weld repair. ECA is a fracture mechanics based prediction of the integrity of welds under operating conditions. Adding to the complexity of an ECA is the occurrence of local constitutive property variations in the weldment (‘weld heterogeneity’). Their quantification is important to allow for an accurate assessment. Hereto, hardness measurements are widely adopted given their theoretical relation with ultimate tensile strength. However, various standards and procedures report a wide variety of different hardness transfer functions and additionally recognize substantial scatter in predictions of strength. Within this context, this paper investigates the suitability of hardness mapping to perform an accurate weld ECA. A finite element analysis has been conducted on welds originating from steel pipelines to simulate their crack driving force response using single-edge notched tension (SE(T)) specimens. Vickers hardness maps and hardness transfer functions are combined to assign element-specific constitutive properties to the model. The resulting crack driving force curves are probed against experimental results. The variable agreement between simulations and experiments highlights the need for further research into the characterization of local constitutive properties of heterogeneous welds. A hardness transfer procedure based on all weld metal tensile testing appears to be particularly promising.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (other)
publication status
published
subject
keyword
Vickers hardness, SE(T) specimen., Crack driving force, Weld, Heterogeneity
in
International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing
publisher
NAFEMS 3D
place of publication
Bangalore
conference name
International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing (NAFEMS-3D – 2016)
conference location
Bangalore, India
conference start
2016-08-29
conference end
2016-08-31
language
English
UGent publication?
yes
classification
C1
copyright statement
I have retained and own the full copyright for this publication
id
8099242
handle
http://hdl.handle.net/1854/LU-8099242
date created
2016-10-01 10:27:15
date last changed
2017-10-11 07:02:50
@inproceedings{8099242,
  abstract     = {Weld flaws often require an engineering critical assessment (ECA) to judge on the necessity for weld repair. ECA is a fracture mechanics based prediction of the integrity of welds under operating conditions. Adding to the complexity of an ECA is the occurrence of local constitutive property variations in the weldment ({\textquoteleft}weld heterogeneity{\textquoteright}). Their quantification is important to allow for an accurate assessment. Hereto, hardness measurements are widely adopted given their theoretical relation with ultimate tensile strength. However, various standards and procedures report a wide variety of different hardness transfer functions and additionally recognize substantial scatter in predictions of strength. Within this context, this paper investigates the suitability of hardness mapping to perform an accurate weld ECA. A finite element analysis has been conducted on welds originating from steel pipelines to simulate their crack driving force response using single-edge notched tension (SE(T)) specimens. Vickers hardness maps and hardness transfer functions are combined to assign element-specific constitutive properties to the model. The resulting crack driving force curves are probed against experimental results. The variable agreement between simulations and experiments highlights the need for further research into the characterization of local constitutive properties of heterogeneous welds. A hardness transfer procedure based on all weld metal tensile testing appears to be particularly promising.},
  author       = {Naib, Sameera and Van Minnebruggen, Koen and De Waele, Wim and Hertel{\'e}, Stijn},
  booktitle    = {International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing},
  keyword      = {Vickers hardness,SE(T) specimen.,Crack driving force,Weld,Heterogeneity},
  language     = {eng},
  location     = {Bangalore, India},
  publisher    = {NAFEMS 3D},
  title        = {Sensitivity study of crack driving force predictions in heterogeneous welds using Vickers hardness maps},
  year         = {2016},
}

Chicago
Naib, Sameera, Koen Van Minnebruggen, Wim De Waele, and Stijn Hertelé. 2016. “Sensitivity Study of Crack Driving Force Predictions in Heterogeneous Welds Using Vickers Hardness Maps.” In International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing. Bangalore: NAFEMS 3D.
APA
Naib, S., Van Minnebruggen, K., De Waele, W., & Hertelé, S. (2016). Sensitivity study of crack driving force predictions in heterogeneous welds using Vickers hardness maps. International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing. Presented at the International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing (NAFEMS-3D – 2016), Bangalore: NAFEMS 3D.
Vancouver
1.
Naib S, Van Minnebruggen K, De Waele W, Hertelé S. Sensitivity study of crack driving force predictions in heterogeneous welds using Vickers hardness maps. International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing. Bangalore: NAFEMS 3D; 2016.
MLA
Naib, Sameera, Koen Van Minnebruggen, Wim De Waele, et al. “Sensitivity Study of Crack Driving Force Predictions in Heterogeneous Welds Using Vickers Hardness Maps.” International NAFEMS Conference on Engineering Analysis, Modeling, Simulation and 3D-Printing. Bangalore: NAFEMS 3D, 2016. Print.