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

Yuan, Ye; Tan, P.J.; Shojaei, K.A.; Wróbel, P.

doi:10.1016/j.ijsolstr.2016.05.019

Cited by 21 publications

(42 citation statements)

References 21 publications

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“…8a. For monotonic-decaying pressure pulse, then t y = 0. with the previous findings by Yuan et al [33] where it was found that Youngdahl's approach can successfully eliminate the dependence of the mid-span deflection of elasto-plastic beams to pulse shape for monotonically decaying blast pulse.…”

Section: Effects Of Pulse Shapesupporting

confidence: 84%

“…The modal approximation technique, see [31][32][33][34], is employed here to derive the equations of motion for the laminated glass panel. Assuming that the dynamic response of the panel results in deformation that continually evolves towards a modal solution, then its velocity fieldẆ (x, y, t) may be written as a product of separate functions of space and time given…”

Section: Equations Of Motionmentioning

confidence: 99%

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Dynamic structural response of laminated glass panels to blast loading

Yuan

Tan

2017

Composite Structures

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This paper presents an analytical model of 'fully-clamped' laminated glass panel subjected to pulse-pressure loading in an air-blast. The dynamic structural response of the laminated glass panel is decoupled into two distinct phases of motion: phase I is controlled by the elastic deformation of the brittle glass plies whilst phase II is dominated by the large inelastic deformation of the Polyvinyl Butyral (PVB) interlayer. Transition between the two phases follows the large scale fragmentation of the glass plies-this will be captured through a stress-based damage criterion. Following the work of others, the PVB interlayer is idealised as a rigid-perfectly plastic material which allows its large inelastic response to be modelled within the constitutive framework of limit analysis. An interactive yield criterion is adopted to capture the simultaneous influence of bending and membrane stretch that governs plastic flow in the interlayer. Predictions by the analytical model are validated against existing experimental data and they will be shown to be in good agreement. Parametric studies were performed to elucidate the effects of total mass (per unit area) and thickness ratio on the maximum transverse deflection. The efficacy of Youngdahl's technique on desensitising pulse shape effects is also studied.

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Section: Effects Of Pulse Shapesupporting

confidence: 84%

Section: Equations Of Motionmentioning

confidence: 99%

Dynamic structural response of laminated glass panels to blast loading

Yuan

Tan

2017

Composite Structures

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“…In order to produce reliable results for dynamic plastic response of the membranes the influence of finite displacements must be retained in the study [20], [40]- [42].The overall response of the structure is thus characterised by the deformed shape, rather than the base configuration. This condition necessitates the membrane force to be included in the dynamic energy equilibrium equations.…”

Section: Statement Of the Problem 21 Assumptionsmentioning

confidence: 99%

“…While the pulse shape can have significant effect on the overall response of the dynamically loaded systems, its effect can be eliminated by utilising the Youngdahl's correlation parameters [46], [48]- [50], the efficacy of which is confirmed for monotonically decaying pulses by Ref. [42]. For impulsive blasts, the pulse shape has no intrinsic effect on the system.…”

Section: Geometry and Load Characteristicsmentioning

confidence: 99%

Inelastic dynamic response of square membranes subjected to localised blast loading

Mehreganian

Fallah

Louca

2018

International Journal of Mechanical Sciences

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Extensive shock and highly localised blast waves generated by detonation of near field explosives (such as Improvised Explosive Devices (IED's)) are catastrophic to structures and detrimental to humans and may result in injury or death, penetration and progressive damage, or perforation through the structure and collapse. Mitigating the effects of such waves is paramount in various aspects of design in Structural, Aeronautical, and Defense engineering, as well as being useful in Forensic Sciences. A theoretical model is presented here to predict the large inelastic deformation of ductile thin square membranes induced by a generic short duration localised pressure pulse load. The pulse loading was idealised as a multiplicative decomposition of spatial and temporal functions. The spatial part is a piecewise continuous function of axisymmetric distribution of constant pressure over a central zone of the target, then exponentially decaying beyond this zone. The temporal part may assume various shapes. Using the constitutive framework of limit analysis and incorporating the influence of finite displacements, two patterns of kinematically admissible, time dependent velocity profiles were investigated. These patterns included stationery and moving plastic hinges. The results were investigated in two cases: once with the interaction between bending moment and membrane forces retained in the analyses, and then when the response was solely governed by membrane forces. For blast loads of high magnitude, the pressure was replaced by an impulsive velocity and the results were cast as functions of dimensionless form of initial kinetic energy. The theoretical results corroborated well with the available experimental results on high strength ARMOX steel, a class of steel impervious to the phenomenon of rate sensitivity.

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“…In addition to the analytical model presented above, three-dimensional (3D) FE calcula- presented for the fully-clamped beam since they are described previously in Yuan et al [1].…”

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confidence: 99%

The influence of deformation limits on fluid–structure interactions in underwater blasts

Yuan

Tan

Shojaei

et al. 2017

International Journal of Impact Engineering

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and energy transfer to a structure from an underwater blast. Hitherto, the majority of an-13 alytical models assume a rigid (non-deformable) and free-standing (unsupported) structure 14 where resistance to its translational motion -apart from that offered by its inertial mass 15-comes from 'ad-hoc' backing spring(s) introduced to simulate compression of the fluid 16 medium and/or the resistance to transverse deformation encountered by a real structure. 17These limitations/assumptions are relaxed in this paper by adopting a physically realistic

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

Cited by 21 publications

References 21 publications

Dynamic structural response of laminated glass panels to blast loading

Dynamic structural response of laminated glass panels to blast loading

Inelastic dynamic response of square membranes subjected to localised blast loading

The influence of deformation limits on fluid–structure interactions in underwater blasts

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