Computational Technology Resources - CCP

Keywords: fracture mechanics, cohesive crack, extended finite element method, thermoelasticity.

Summary

This paper presents an algorithm for coupling cohesive cracking with stationary and non-stationary heat flow at high temperatures that in many cases is connected with changes of material parameters. The source of higher temperatures can come from fire exposure or the working environment. The thermo-mechanical load of a structure can cause fractures of the material. When the fracture increases the cracks interfere with heat flow through the structure. The fractured material causes a barrier for heat flow. But the high temperatures inside the body leads to changes of material properties such as for example Young's modulus, thermal conductivity and so on. In many materials at high temperatures the tensile strength is reduced while fracture energy increases. The change of material properties resulting from the high temperature can as a consequence change the criteria for crack propagation. Then the crack path at high temperatures can differ from the path at a reference temperature. In the paper the coupled problem is analysed using the extended finite element approach. The thermo-mechanical cohesive crack model is proposed that takes into account cohesion tractions, heat flux through the crack and dependence of the cohesive crack model on the current temperature state.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £45 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 105 PROCEEDINGS OF THE NINTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: Paper 67 A Coupled Thermo-Mechanical Cohesive Crack Model in Three-Dimensional Crack Growth Analysis J. Jaskowiec Institute for Computational Civil Engineering, Faculty of Civil Engineering, Cracow University of Technology, Poland doi:10.4203/ccp.105.67 purchase the full-text of this paper Full Bibliographic Reference for this paper J. Jaskowiec, "A Coupled Thermo-Mechanical Cohesive Crack Model in Three-Dimensional Crack Growth Analysis", in , (Editors), "Proceedings of the Ninth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 67, 2014. doi:10.4203/ccp.105.67 Keywords: fracture mechanics, cohesive crack, extended finite element method, thermoelasticity. Summary This paper presents an algorithm for coupling cohesive cracking with stationary and non-stationary heat flow at high temperatures that in many cases is connected with changes of material parameters. The source of higher temperatures can come from fire exposure or the working environment. The thermo-mechanical load of a structure can cause fractures of the material. When the fracture increases the cracks interfere with heat flow through the structure. The fractured material causes a barrier for heat flow. But the high temperatures inside the body leads to changes of material properties such as for example Young's modulus, thermal conductivity and so on. In many materials at high temperatures the tensile strength is reduced while fracture energy increases. The change of material properties resulting from the high temperature can as a consequence change the criteria for crack propagation. Then the crack path at high temperatures can differ from the path at a reference temperature. In the paper the coupled problem is analysed using the extended finite element approach. The thermo-mechanical cohesive crack model is proposed that takes into account cohesion tractions, heat flux through the crack and dependence of the cohesive crack model on the current temperature state. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £45 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions