DOI QR코드

DOI QR Code

Fracture Simulation of Low-Temperature High-Strength Steel (EH36) using User-Subroutine of Commercial Finite Element Code

상용 유한요소코드 사용자-서브루틴을 이용한 저온용 고장력강 (EH36)의 파단 시뮬레이션

Choung, Joonmo;Nam, Woongshik;Kim, Younghun
정준모;남웅식;김영훈

  • Received : 2013.09.13
  • Accepted : 2014.02.13
  • Published : 2014.02.28

Abstract

This paper discusses a new formulation for the failure strain in the average stress triaxiaility domain for a low-temperature high-strength steel (EH36). The new formula available at a low average stress triaxiality zone is proposed based on the comparison of two results from tensile tests of flat type specimens and their numerical simulations. In order to confirm the validity of the failure strain formulation, a user-subroutine was developed using Abaqus/Explicit, which is known to be one of the most popular commercial finite element analysis codes. Numerical fracture simulations with the user-subroutine were conducted for all the tensile tests. A comparison of the engineering stress-strain curves and engineering failure strain obtained from the numerical simulation with the user-subroutine for the tensile tests revealed that the newly developed user-subroutine effectively predicts the initiation of failure.

Keywords

Average stress triaxiality;Failure strain;True stress;User-subroutine

References

  1. Altair, 2011. HyperWorks User Manual.
  2. American Society for Testing and Materials (ASTM), 2004. E8-04 Standard Test Methods for Tension Testing of Metallic Materials. ASTM.
  3. Bai, Y., Wierzbicki, T., 2008. A New Model of Metal Plasticity and Fracture with Pressure and Lode Dependence. International Journal of Plasticity, 24, 1071-1096. https://doi.org/10.1016/j.ijplas.2007.09.004
  4. Choung, J., 2009. Comparative Studies of Fracture Models for Marine Structural Steels. Ocean Engineering, 36, 1164-1174. https://doi.org/10.1016/j.oceaneng.2009.08.003
  5. Bai, Y., Wierzbicki, T., 2010. Application of Extended Mohr-Coulomb Criterion to Ductile Fracture. International Journal of Fracture, 161, 1-20. https://doi.org/10.1007/s10704-009-9422-8
  6. Bao, Y., Wierzbicki, T., 2004. On Fracture Locus in the Equivalent Strain and Stress triaxiality space. International Journal of Mechanical Sciences, 46, 81-98. https://doi.org/10.1016/j.ijmecsci.2004.02.006
  7. Beese, A. M., Mohr, D., 2011, Effect of Stress Triaxiality and Lode Angle on the Kinetics of Strain-induced Austenite-to-Martensite Transformation. Acta Materialia, 59, 2589-2600. https://doi.org/10.1016/j.actamat.2010.12.040
  8. Choung, J., Cho, S.R., Kim, K.S., 2010. Impat Test Simulations of Stiffened Plates using the Micromechanical Porous Plasticity Model. Ocean Engineering, 37, 749-756. https://doi.org/10.1016/j.oceaneng.2010.02.015
  9. Choung, J., Shim, C.S., Kim, K.S., 2011 Plasticity and Fracture Behaviors of Marine Structural Steel, Part III: Experimental Study on Failure Strain. Journal of Ocean Engineering and Technology, 25(3), 53-66. https://doi.org/10.5574/KSOE.2011.25.3.053
  10. Choung, J., Shim C.S., Song H.C., 2012. Estimation of Failure Strain of EH36 High Strength Marine Structural Steel using Average Stress Triaxiality. Marine Structures, 29, 1-21. https://doi.org/10.1016/j.marstruc.2012.08.001
  11. Choung, J., Nam, W., 2013. Formulation of Failure Strain according to Average Stress Triaxiality of Low Temperature High Strength Steel (EH36). Journal of Ocean Engineering and Technology, 27(2), 19-26. https://doi.org/10.5574/KSOE.2013.27.2.019
  12. Dunand, M., Mohr, D., 2011. On the Predictive Capabilities of the Shear Modified Gurson and the Modified Mohr-Coulomb Fracture Models over a Wide Range of Stress Triaxialities and Lode Angles. Journal of the Mechanics and Physics of Solids, 59, 1374-1394. https://doi.org/10.1016/j.jmps.2011.04.006
  13. Haris, S., Amdahl, J., 2013. Analysis of Ship-ship Collision Damage Accounting for Bow and Side Deformation Interaction. Marine Structures, 32, 18-48 https://doi.org/10.1016/j.marstruc.2013.02.002
  14. Liu, Z., Amdahl, J., Loset, S., 2011. Integrated Numerical Analysis of an Iceberg Collision with a Foreship Structure. Marine Structures, 24(4), 377-395 https://doi.org/10.1016/j.marstruc.2011.05.004
  15. Luo, M., Wierzbicki, T., 2010. Numerical Failure Analysis of a Stretch-Bending Test on Dual-Phase Steel Sheets using a Phenomenological Fracture Model. International Journal of Solids and Structures, 47, 3804-3102.
  16. Luo, M., Dunand, M., Mohr, D., 2012. Experiments and Modeling of Anisotropic Aluminum Extrusions under Multi-Axial Loading-Part II: Ductile Fracture. International Journal of Plasticity, 32-33, 36-58. https://doi.org/10.1016/j.ijplas.2011.11.001
  17. Nguyen, T.-H., Amdahl, J., Leira, B. J., Garre, L., 2011. Understanding Ship-grounding Events Marine Structures, Marine Structures, 24(4), 551-569. https://doi.org/10.1016/j.marstruc.2011.07.001
  18. Simulia, 2008. ABAQUS Analysis User's Manual.
  19. Tornqvist, R., 2003. Design of Crashworthy Ship Structures. Technical University of Denmark, Ph.D Thesis.
  20. Urban, J., 2003. Crushing and Fracture of Lightweight Structures. Technical University of Denmark, Ph.D Thesis.

Cited by

  1. Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies vol.29, pp.6, 2015, https://doi.org/10.5574/KSOE.2015.29.6.445
  2. Development of Three-Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part II Formulation of Fracture Strain Surface vol.29, pp.6, 2015, https://doi.org/10.5574/KSOE.2015.29.6.454
  3. Punching Fracture Simulations of Circular Unstiffened Steel Plates using Three-dimensional Fracture Surface vol.30, pp.6, 2016, https://doi.org/10.5574/KSOE.2016.30.6.474
  4. Ductile Fracture Predictions of High Strength Steel (EH36) using Linear and Non-Linear Damage Evolution Models vol.31, pp.4, 2017, https://doi.org/10.26748/KSOE.2017.08.31.4.288

Acknowledgement

Supported by : 산업통상자원부