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dc.contributor.authorMajidiRad, Amir Hossein
dc.contributor.authorYihun, Yimesker S.
dc.identifier.citationMajidiRad, AmirHossein, and Yihun, Yimesker S. "Experimental and Numerical Investigation of Residual Stress Stiffening Influence on Dynamic Response of Welded Structures." Proceedings of the ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 31st Conference on Mechanical Vibration and Noise. Anaheim, California, USA. August 18–21, 2019. V008T10A057. ASMEen_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThis paper presents the study of welding residual stress-stiffening effect on the dynamic responses and vibrational parameters of welded aluminum parts through an experimental modal analysis and Center Hole Drilling (CHD) residual stress measurement methods. Having a great corrosion resistance, AA5056 was utilized in this research that has been used in aircraft and ship structures; making the welding assesment of crucial. Natural frequencies and damping factors of several specimens are compared before and after the welding along with verification of experimental modal analysis integrity using Euler-Bernoulli relations. Finite element modeling of welding, cutting and modal/stress analysis of samples are also done to compare the experimental results. The results obtained from the precise modal analysis of all samples show that welding made the structure harder leading to 2% increase in natural frequencies and changing damping factors of different mode shapes. Cutting also reduced the level of residual stresses up to 34%. A good agreement is shown between the modal analysis and the experimental results. The technique used in the experiment and finite element simulation along with modeling assumptions are beneficial to other applications where model updating is required or a prediction of residual stress stiffening influence on modal responses is important.en_US
dc.relation.ispartofseriesASME Design Engineering Technical Conference;v.8:31st Conference on Mechanical Vibration and Noise
dc.subjectCorrosion resistanceen_US
dc.subjectDynamic responseen_US
dc.subjectFactor analysisen_US
dc.subjectFinite element methoden_US
dc.subjectNatural frequenciesen_US
dc.subjectResidual stressesen_US
dc.subjectVibration analysisen_US
dc.titleExperimental and numerical investigation of residual stress stiffening influence on dynamic response of welded structuresen_US
dc.typeConference paperen_US
dc.rights.holder© 2019 ASMEen_US

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