Debonding dynamics in FRP plated beams: high order cohesive FE formulation and parametric sensitivity

Mulian, Gilad; Rabinovitch, Oded

doi:10.1007/s10704-015-0048-8

Cited by 15 publications

(18 citation statements)

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“…Two reasons motivated the use of relatively thick adhesive layers. First, the sensitivity parametric study reported in Mulian and Rabinovitch (2015) revealed that using thicker layers involves lower debonding velocities. For a given photography rate, which is dictated by the equipment used and discussed in the following section, reducing the debonding velocity allows to capture the process in a larger number of individual snapshots.…”

Section: Componentmentioning

confidence: 99%

“…This is essential for capturing the independent evolution of the dynamic debonding failure mechanism in each of the physical interfaces of the adhesive layer. In Mulian and Rabinovitch (2015) , the extended high order dynamic model was converted into a FE form that simplifies the analysis and allows using standard numerical procedures for the solution of the nonlinear PDEs. Mulian and Rabinovitch (2015) also presented a parametric sensitivity study that quantified the impact of various structural and interfacial parameters on the dynamic debonding response.…”

Section: Introductionmentioning

confidence: 99%

“…In Mulian and Rabinovitch (2015) , the extended high order dynamic model was converted into a FE form that simplifies the analysis and allows using standard numerical procedures for the solution of the nonlinear PDEs. Mulian and Rabinovitch (2015) also presented a parametric sensitivity study that quantified the impact of various structural and interfacial parameters on the dynamic debonding response. The study quantified the impact of the properties of the cohesive interfaces on the movement and the velocity of the debonding front.…”

Section: Introductionmentioning

confidence: 99%

“…By means of that investigation, the paper aims to establish an experimental benchmark for the physical response of the structure during the dynamic debonding process. The experimental benchmark also aims to examine, support, and validate the theoretical, analytical, and numerical tools developed for the handling of the problem ( Rabinovitch 2012( Rabinovitch , 2014aMulian and Rabinovitch 2015 ) and to quantify some of the tacit parameters of the analytical and numerical models. This objective particularly refers to the parameters governing the cohesive interfaces used in the analysis.…”

Section: Introductionmentioning

confidence: 99%

“…As a first step, it allows to eliminate other factors such as cracking of a concrete substrate or the effect of joints in a masonry substrate and to focus on the debonding process and its dynamic characteristics. The paper then combines the experimental methodologies with analytical and numerical ones and uses the extended high order model developed in Rabinovitch (2014a , b) and its FE form developed in Mulian and Rabinovitch (2015) . The experimental and computational platforms are combined in attempt to explore additional aspects of the physical phenomenon.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and analytical study of the dynamic debonding in FRP plated beams

Mulian

Rabinovitch

2016

International Journal of Solids and Structures

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a b s t r a c tThis paper presents an experimental study of the dynamic debonding failure mechanism in FRP plated beams. The experimental study is accompanied by an analytical/numerical study. The focus in the experimental investigation is on the dynamic aspects of the brittle, rapid, and abrupt failure mechanism and on its characterization and quantification. The experimental technique is based on four point bending tests of FRP plated steel beam specimens. The main dynamic monitoring technique uses high-speed digital photography with rate of 88,050 frames per second. The analytical and numerical aspects of the investigation use an extended high order layered beam theory with a physical modeling resolution that considers nucleation and evolution of the debonding mechanism in each physical interface. This is achieved by using cohesive interfaces and a specially tailored finite element formulation that is based on the theory. Digital image processing of the experimental results reveals and quantifies the dynamics of the interfacial failure with propagation velocities in the order of 100-1000 m/s and duration of less than 0.2 ms. The results reveal the dynamic nature of the failure process and provide an experimental benchmark for its consideration. They also provide direct experimental data for supporting and validating the theory and for determining the fracture energy and length scale parameters of the cohesive interfaces. With that, the combined experimental and theoretical study further explores the dynamic features of the failure mechanism.

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Section: Componentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%