This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Accounting for Geometry and Residual Stresses in Weld Fatigue: A Strain Energy Density Approach to Total Life of Welded T-Specimens
Technical Paper
2019-01-0523
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Although many practical examinations of metal fatigue focus on crack initiation or crack growth, in practice many fatigue failures begin by initiating a crack which then grows until the part fractures completely or can no longer support the loads for which it was designed. This two-phase view of fatigue, called “total life”, is intended to aid engineers in designing parts that will meet design requirement while reducing unnecessary weight and cost. The challenge of using the total life to predict component life is magnified when components are welded together. This work, as a part of a larger project, examines the influence of the welding process on fatigue life predictability by predicting the life of welded specimens made from A36 steel as well as specimens machined from the same material using a geometry designed to develop a nearly identical stress distribution when loaded in the same way and comparing the predictions to measurements. Measured weld toe geometry and residual stresses were used and the results are employed in the relevant calculations. The methods used for predicting the strain-life and fatigue crack growth rates of the material are calculated by a strain energy density method [1]. A non-linear method for predicting variable amplitude fatigue crack initiation is also used [2]. The results show promise, in that if the key variables are appropriately accounted for the fatigue life of welds can be predicted using the material properties of the base material if both the fatigue crack initiation and fatigue crack growth phases are considered together as a total fatigue life. This work is a part of a collaborative project of the SAE Fatigue Design and Evaluation committee.
Recommended Content
Technical Paper | The Effect of Welding Metallurgy on Design |
Technical Paper | Heating Due to Material Elastic Deformation |
Authors
Topic
Citation
Huffman, P., "Accounting for Geometry and Residual Stresses in Weld Fatigue: A Strain Energy Density Approach to Total Life of Welded T-Specimens," SAE Technical Paper 2019-01-0523, 2019, https://doi.org/10.4271/2019-01-0523.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Huffman , P.J. A Strain Energy Based Damage Model for Fatigue Crack Initiation and Growth International Journal of Fatigue 88 197 204 2016 10.1016/j.ijfatigue.2016.03.032
- Huffman , P.J. and Beckman , S.P. A Non-Linear Damage Accumulation Fatigue Model for Predicting Strain Life at Variable Amplitude Loadings Based on Constant Amplitude Fatigue Data International Journal of Fatigue 48 165 169 2013 10.1016/j.ijfatigue.2012.10.016
- Wohler , A. Versuche ber die festigkeit der eisenbahnwagenachsen Zeitschrift fur Bauwesen 10 1860
- Wetzel , R.M. Fatigue under Complex Loading: Analysis and Experiments Advances in Engineering Warrendale, PA Society of Automotive Engineers 1977
- Ramberg , W. and Osgood , W.R. 1943
- Basquin , O.H. The Exponential Law of Endurance Test Proceedings of the American Society for Testing and Materials 10 625 630 1910
- Manson , S.S. 1953
- Coffin , L.F. A Study of the Effects of Cyclic Thermal Stresses on a Ductile Metal Transactions of the ASME 76 931 950 1954
- Noroozi , A. , Glinka , G. , and Lambert , S. A Two Parameter Driving Force for Fatigue Crack Growth Analysis International Journal of Fatigue 27 1277 1296 2005
- Walker , K. 462 1 14 1970
- Neuber , H. Theory of Stress Concentration for Shear Strained Prismatic Bodies with Arbitrary Non-Linear Stress Strain Law Journal of Applied Mechanics 544 550 1961
- Miner , M. Cumulative Damage in Fatigue Journal of Applied Mechanics Transactions, ASME 12 3 1945
- Matsuishi , M. and Endo , T. 1968
- Dindinger Dir/Folder for Low Carbon Steels, Fatigue Files http://fde.uwaterloo.ca/Fde/Materials/Steel/Lowcarbon/lowcarbon.html 2015
- Newman , J.C. , Ziegler , B.M. , Shaw , J.W. , Cordes , T.S. et al. Fatigue Crack Growth Rate Behavior of A36 Steel Using ASTM Load-Reduction and Compression Precracking Test Methods Journal of ASTM International 9 4 103966 2012 10.1520/jai103966
- Noroozi , A. , Glinka , G. , and Lambert , S. A Study of the Stress Ratio Effects on Fatigue Crack Growth Using the Unified Two-Parameter Fatigue Crack Growth Driving Force International Journal of Fatigue 29 9-11 1616 1633 2007 10.1016/j.ijfatigue.2006.12.008
- Huffman , P.J. 2014
- Norton , E. , Blodig , R. , Lister , M. , and Cordes , T. Testing of Welded and Machined A36 Steel T-Joint Configuration Specimens SAE FD&E Total Life Project 2019-01-0535 2019
- Gales , C. and Mach , J. FD&E Total Life T-Sample Residual Stress Analytical Predictions and Measured Results SAE FD&E Total Life Project 2019-01-0528 2019
- Norton , E. , Brown , H. , Cordes , T. , and Munson , K. Comparison of Total Fatigue Life Predictions of Welded and Machined A36 Steel T-Joints SAE FD&E Total Life Project 2019-01-0527 2019
- Conle , A. Fatigue life prediction for F.D.E. welded plate specimen SAE FD&E Total Life Project 2019-01-0538 2019
- Munson , K. , Mentley , J. , and Halfpenny , A. A finite element based methodology for combined crack initiation and crack growth prediction in welded structures SAE FD&E Total Life Project 2019-01-0537 2019