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Development of Simplified Finite Element Model for Ultra-High-Strength Steel Resistance Spot Weld Fractures
Technical Paper
2020-01-0220
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes the development of a simplified fracture finite element (FE) model for resistance spot welds (RSW) of ultra-high-strength steel (UHSS) that can be incorporated into large-scale vehicle FE model. It is known that the RSW of UHSS generates two types of fracture modes: heat-affected zone (HAZ) and nugget zone fractures. Lap shear and peeling coupon tests using UHSS sheets found that the different RSW fracture modes occurred at different nugget diameters. To analyze this phenomenon, detailed simulated coupon tests were carried out using solid hexahedral elements. The analytical results revealed that RSW fractures are defined by both the application of plastic strain on the elements and the stress triaxiality state of the elements. A detailed model incorporating a new fracture criteria model recreated the different UHSS RSW fracture modes and achieved a close correlation with the coupon test results. Based on these results, a new simplified fracture model that can be incorporated into large-scale vehicle FE model was developed. This new model uses solid hexahedral elements to simulate the nugget zone and shell elements for the HAZ. Simulated coupon tests using the new model were also capable of recreating the different UHSS RSW fracture modes and correlated closely with the coupon test results.
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Citation
Kawahara, K., Koga, M., Arimoto, S., Nomura, N. et al., "Development of Simplified Finite Element Model for Ultra-High-Strength Steel Resistance Spot Weld Fractures," SAE Technical Paper 2020-01-0220, 2020, https://doi.org/10.4271/2020-01-0220.Data Sets - Support Documents
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References
- Hayashi , S. and Kumagai , K. Development of Seatbelt Anchorage Strength Analysis Method Using Dynamic Explicit Code Transactions of Society of Automotive Engineers of Japan 32-2 2001
- Kumagai , K. , Hayashi , S. , and Ohno , T. Development of Rupture Modeling under Dynamic Loading for Car Crash Analysis Proceedings of the 6th German LS-DYNA Forum 2007
- Kumagai , K. , Shirooka , M. , Ohachi , J. , and Ogawa , T. Rupture Modeling of Spot Welds Suitable for Vehicle Crash FE Analysis in Vehicle Development Process Proceedings of the 6th European LS-DYNA Users’ Conference 2007 2007
- Kumagai , K. , Shirooka , M. , Ohachi , J. , and Ogawa , T. Rupture Modeling of Spot Welds Suitable for Crash FE Analysis in Vehicle Development Process Transactions of Society of Automotive Engineers of Japan 38 6 2007
- Ueda , H. , Fukumoto , M. , and Nakayama , E. Development of Fracture Model for Spot Welds Using Weld Simulation Including Different Materials and Thickness of Steel Sheets Transactions of Society of Automotive Engineers of Japan 46 3 2015
- Kuwahara , M. , Kumagai , K. , and Yasuki , T. Improvement of Spot Fracture Analysis in Side Impact Test Configuration Transactions of Society of Automotive Engineers of Japan 46 3 2015
- Ueda , H. , Nakayama , E. , Okada , T. , and Fujimoto , H. Study of the Fracture Prediction of Spot Welded Joint Using Local Plastic Strain and Stress Triaxiality as Fracture Criterion (First Report) Transactions of Society of Automotive Engineers of Japan 44 2 2013
- Ueda , H. , Nakayama , E. , Okada , T. , and Fujimoto , H. Study of the Fracture Prediction of Spot Welded Joint Using Local Plastic Strain and Stress Triaxiality as Fracture Criterion (Second Report) Transactions of Society of Automotive Engineers of Japan 44 2 2013
- Zeniya , T. , Koga , A. , Hirose , S. , Furusako , S. et al. Study on Measures against Spot Weld Fracture of Ultra-High-Strength Steel Frame (First Report) Transactions of Society of Automotive Engineers of Japan 49 2 2018