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Large deformation, damage evolution and failure of ductile structures to pulse-pressure loading

Yuan, Y; Tan, PJ; Shojaei, KA; Wrobel, P; (2016) Large deformation, damage evolution and failure of ductile structures to pulse-pressure loading. International Journal of Solids and Structures , 96 pp. 320-339. 10.1016/j.ijsolstr.2016.05.019. Green open access

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Abstract

In this paper, a model is developed for an elastic perfectly-plastic structural beam system subjected to general pulse-pressure loadings - this may be either impulsive or non-impulsive - which is capable of capturing large non-linear deformation, ductile damage evolution and its consequential failure. The proposed model is an extension of Schleyer and Hsu (2000) by incorporating interactions between bending, membrane stretch and transverse shear in the fully plastic stress state, and uses damage mechanics to capture the loss of integrity at the supports and the subsequent beam detachment. Predictions by the model were validated against existing experimental data from literature and to three-dimensional finite element models developed in this paper. Parametric studies were performed to elucidate the effects of loading duration on the mode of deformation by the beam and the critical conditions governing their transition. The efficacy of Youngdahl’s (1970; 1971) technique on desensitising pulse shape effects is also investigated using different pressure pulse profiles and it will be shown that the technique is successful only for monotonically decaying pulse-pressures.

Type: Article
Title: Large deformation, damage evolution and failure of ductile structures to pulse-pressure loading
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ijsolstr.2016.05.019
Publisher version: http://dx.doi.org/10.1016/j.ijsolstr.2016.05.019
Language: English
Additional information: Copyright © 2016. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0.
Keywords: Non-impulsive loadings; Large deformation; Damage modes; Pulse shape; Youngdahl’s approximation
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1498750
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