Modelling Stress Relaxation in Bolt Loaded CT{Specimens

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dc.contributor.authorShojaee, Shervin
dc.contributor.departmentChalmers tekniska högskola / Institutionen för teknisk fysiksv
dc.contributor.departmentChalmers University of Technology / Department of Applied Physicsen
dc.date.accessioned2019-07-03T13:35:13Z
dc.date.available2019-07-03T13:35:13Z
dc.date.issued2014
dc.description.abstractCracks in welds at higher temperature ranges (288 C) are prone to creep deformation and hence affect the crack tip stresses. Various creep models are presented. One of the models are used to describe the bolt load relaxation of modified CT-specimens analytically. The model is compared to numerical results using Ansys. The long term bolt load relaxation rate described by the model was similar to the three dimensional numerical analysis. It should be noted that a performed experimental bolt load relaxing experiment was performed, but due to lack of creep deformation data at the temperature of interest, fictive material data parameters were used instead. The CT-specimen was bolt loaded with 16:66 kN. After a 50 h heat treatment cycle at 288 C, the bolt had relaxed by approximately 30 %. A bolt load relaxation model for fictive materials were compared with numerical results using the numerical calculation tool Ansys. The shape of the model was consistent with the numerical results, although, some calibrations of the model is still required to reach a satisfying result.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/209361
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectGrundläggande vetenskaper
dc.subjectEnergi
dc.subjectFysik
dc.subjectHållbar utveckling
dc.subjectBasic Sciences
dc.subjectEnergy
dc.subjectPhysical Sciences
dc.subjectSustainable Development
dc.titleModelling Stress Relaxation in Bolt Loaded CT{Specimens
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeNuclear engineering, MSc
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