Investigating the structural dynamics and crack propagation behavior under uniform and non-uniform temperature conditions

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dc.contributor.authorKamei, Khangamlung
dc.contributor.authorKhan, Muhammad A.
dc.date.accessioned2021-11-25T16:05:13Z
dc.date.available2021-11-25T16:05:13Z
dc.date.issued2021-11-21
dc.description.abstractThe robustness and stability of the system depend on structural integrity. This stability is, however, compromised by aging, wear and tear, overloads, and environmental factors. A study of vibration and fatigue cracking for structural health monitoring is one of the core research areas in recent times. In this paper, the structural dynamics and fatigue crack propagation behavior when subjected to thermal and mechanical loads were studied. It investigates the modal parameters of uncracked and various cracked specimens under uniform and non-uniform temperature conditions. The analytical model was validated by experimental and numerical approaches. The analysis was evaluated by considering different heating rates to attain the required temperatures. The heating rates were controlled by a proportional-integral-derivative (PID) temperature controller. It showed that a slow heating rate required an ample amount of time but more accurate results than quick heating. This suggested that the heating rate can cause variation in the structural response, especially at elevated temperatures. A small variation in modal parameters was also observed when the applied uniform temperatures were changed to non-uniform temperatures. This study substantiates the fatigue crack propagation behavior of pre-seeded cracks. The results show that propagated cracking depends on applied temperatures and associated mass. The appearance of double crack fronts and multiple cracks were observed. The appearance of multiple cracks seems to be due to the selection of the pre-seeded crack shape. Hence, the real cracks and pre-seeded cracks are distinct and need careful consideration in fatigue crack propagation analysis.en_UK
dc.identifier.citationKamei K, Khan MA. (2021) Investigating the structural dynamics and crack propagation behavior under uniform and non-uniform temperature conditions. Materials, Volume 14, Issue 22, November 2021, Article number 7071.en_UK
dc.identifier.issn1996-1944
dc.identifier.urihttps://doi.org/10.3390/ma14227071
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17298
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectfatigue crack propagationen_UK
dc.subjectvibration analysisen_UK
dc.subjectcrack depth measurementen_UK
dc.subjectmodal parametersen_UK
dc.titleInvestigating the structural dynamics and crack propagation behavior under uniform and non-uniform temperature conditionsen_UK
dc.typeArticleen_UK

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