Influence of the Cohesive Zone Model Shape Parameter on Asphalt Concrete Fracture Behavior

Song, Seong Hyeok; Paulino, Gláucio H.; Buttlar, William G.

doi:10.1063/1.2896872

Cited by 24 publications

(15 citation statements)

References 5 publications

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“…The non-dimensional shape parameter indices (a, b) are introduced because the specific shape of the cohesive zone model can significantly affect results of the fracture analysis (see, for example, Volokh, 2004;Alfano, 2006;Song et al, 2008). If the shape parameter indices are equal to two, the order of the potential function is approximately two.…”

Section: Article In Pressmentioning

confidence: 99%

A unified potential-based cohesive model of mixed-mode fracture

Park

Paulino

Roesler

2009

Journal of the Mechanics and Physics of Solids

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399

247

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Section: Article In Pressmentioning

confidence: 99%

A unified potential-based cohesive model of mixed-mode fracture

Park

Paulino

Roesler

2009

Journal of the Mechanics and Physics of Solids

Self Cite

399

247

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“…In particular, the sensitivity of cohesive zone parameters in predicting the mechanical response of the specimen is examined. In addition, as the shape of the actual cohesive zone model may affect the numerical simulations (Williams and Hadavinia 2002;Sorensen and Jacobsen 2003;Shet and Chandra 2004;Volokh 2004;Alfano 2006a;Song et al 2008), the results obtained using widely adopted traction-separation relations (i.e. trapezoidal, bilinear and exponential model) are compared.…”

Section: Introductionmentioning

confidence: 99%

Mode I fracture of adhesive joints using tailored cohesive zone models

et al. 2008

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Cohesive zone models are explored in order to study cleavage fracture in adhesive bonded joints. A mode I cohesive model is defined which correlates the tensile traction and the displacement jump (crack faces opening) along the fracture process zone. In order to determine the traction-separation relation, the main fracture parameters, namely the cohesive strength and the fracture energy, as well as its shape, must be specified. However, owing to the difficulties associated to the direct measurement of the fracture parameters, very often they are obtained by comparing a measured fracture property with numerical predictions based on an idealized traction separation relation. Likewise in this paper the cohesive strength of an adhesive layer sandwiched between elastic substrates is adjusted to achieve a match between simulations and experiments. To this aim, the fracture energy and the load-displacement curve are adopted as input in the simulations. In order to assess whether or not the shape of the cohesive model may have an influence on the results, three representative cohesive zone models have been investigated, i.e. exponential, bilinear and trapezoidal. A good agreement between experiments and simulations has been generally observed. However, a slight difference in predicting the loads for damage onset has been found using the different cohesive models.

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“…His conclusion was that whether or not the shape of the softening curve is an important parameter may depend on the boundary value problem, in particular on the ratio between the interface toughness and the stiffness of the bulk material. Song et al [37] showed the influence of cohesive softening shape becomes significant as the relative size of fracture process zone compared to the structure size increases for quasi-brittle materials, while the cohesive parameters including material strength and cohesive fracture energy are considered more important than the cohesive softening shape. Turon et al [38] and Harper et al [39] used the bilinear CZM, Goyal et al [40] and Liu et al [41] used the exponential CZM to study the effect of cohesive strength on the mixed-mode delamination of composite laminates in terms of the double cantilever beam (DCB), the end-notched flexure (ENF) test and mixed-mode bending (MMB) specimens.…”

Section: Introductionmentioning

confidence: 99%