Abstract
Structures usually experience deterioration during their working life. Oxidation, corrosion, UV exposure, and thermo-mechanical fatigue are some of the most well-known mechanisms that cause degradation. The phenomenon gradually changes structural properties and dynamic behaviour over their lifetime, and can be more problematic and challenging in the presence of nonlinearity. In this paper, we study how the dynamic behaviour of a nonlinear system changes as the thermal environment causes certain parameters to vary. To this end, a nonlinear lumped mass modal model is considered and defined under harmonic external force. Temperature dependent material functions, formulated from empirical test data, are added into the model. Using these functions, bifurcation parameters are defined and the corresponding nonlinear responses are observed by numerical continuation. A comparison between the results gives a preliminary insight into how temperature induced properties affects the dynamic response and highlights changes in stability conditions of the structure.
| Language | English |
|---|---|
| Article number | 012123 |
| Journal | Journal of Physics: Conference Series |
| Volume | 744 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 3 Oct 2016 |
| Externally published | Yes |
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Bibliographical note
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Nonlinear Dynamics of Structures with Material Degradation. / Soltani, P.; Wagg, D. J.; Pinna, C.; Whear, R.; Briody, C.
In: Journal of Physics: Conference Series, Vol. 744, No. 1, 012123, 03.10.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonlinear Dynamics of Structures with Material Degradation
AU - Soltani, P.
AU - Wagg, D. J.
AU - Pinna, C.
AU - Whear, R.
AU - Briody, C.
N1 - Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
PY - 2016/10/3
Y1 - 2016/10/3
N2 - Structures usually experience deterioration during their working life. Oxidation, corrosion, UV exposure, and thermo-mechanical fatigue are some of the most well-known mechanisms that cause degradation. The phenomenon gradually changes structural properties and dynamic behaviour over their lifetime, and can be more problematic and challenging in the presence of nonlinearity. In this paper, we study how the dynamic behaviour of a nonlinear system changes as the thermal environment causes certain parameters to vary. To this end, a nonlinear lumped mass modal model is considered and defined under harmonic external force. Temperature dependent material functions, formulated from empirical test data, are added into the model. Using these functions, bifurcation parameters are defined and the corresponding nonlinear responses are observed by numerical continuation. A comparison between the results gives a preliminary insight into how temperature induced properties affects the dynamic response and highlights changes in stability conditions of the structure.
AB - Structures usually experience deterioration during their working life. Oxidation, corrosion, UV exposure, and thermo-mechanical fatigue are some of the most well-known mechanisms that cause degradation. The phenomenon gradually changes structural properties and dynamic behaviour over their lifetime, and can be more problematic and challenging in the presence of nonlinearity. In this paper, we study how the dynamic behaviour of a nonlinear system changes as the thermal environment causes certain parameters to vary. To this end, a nonlinear lumped mass modal model is considered and defined under harmonic external force. Temperature dependent material functions, formulated from empirical test data, are added into the model. Using these functions, bifurcation parameters are defined and the corresponding nonlinear responses are observed by numerical continuation. A comparison between the results gives a preliminary insight into how temperature induced properties affects the dynamic response and highlights changes in stability conditions of the structure.
UR - http://www.scopus.com/inward/record.url?scp=84994098448&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/744/1/012123
DO - 10.1088/1742-6596/744/1/012123
M3 - Article
VL - 744
JO - Journal of Physics: Conference Series
T2 - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012123
ER -