Interlaminar fracture analysis in the GII–GIII plane using prestressed transparent composite beams

Szekrényes, András; Vicente, William

doi:10.1016/j.compositesa.2011.09.022

Cited by 28 publications

(26 citation statements)

References 28 publications

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“…A three-dimensional linear-elastic finite element model of the sandwich SCB configuration was developed for analyzing the fracture behavior in terms of the strain energy release rate. It should be specified that the imposed displacements are widely used by Szekrenyes in order to generate mixed-mode crack loading conditions when studying interlaminar fracture in fiber reinforced composites (Szekrenyes, 2007(Szekrenyes, , 2009a(Szekrenyes, , b, 2010(Szekrenyes, , 2011aSzekrenyes and Vicente, 2012). For instance, a composite end-notched flexure was prestressed using three-point bending and then loaded using scissor-like load to induce mixed-mode II/III interlaminar fracture (Szekrenyes, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…For instance, a composite end-notched flexure was prestressed using three-point bending and then loaded using scissor-like load to induce mixed-mode II/III interlaminar fracture (Szekrenyes, 2007). The interlaminar fracture behavior of unidirectional fiber reinforced composite under mixed-mode II/III crack loading conditions was investigated also using prestressed SCB which is a superposition of end-loaded split and modified split cantilever systems (Szekrenyes and Vicente, 2012). In order to produce mixed-mode II/III conditions in laboratory environment, a special prestresser was used (Szekrenyes and Vicente, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of mixed-mode II/III fracture in sandwich beams

Rizov

2015

Multidiscipline Modeling in Materials and Structures

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Purpose -The purpose of this paper is to study theoretically the ability of the prestressed foam core composite sandwich Split Cantilever Beam (SCB) for generating mixed-mode II/III crack loading conditions (the mode II fracture was provided by prestressing the beam using imposed transverse displacements). Design/methodology/approach -The concepts of linear-elastic fracture mechanics were used. The fracture behavior was studied in terms of the strain energy release rate. For this purpose, a three-dimensional finite element model of the prestressed sandwich SCB was developed. The virtual crack closure technique was applied in order to analyze the strain energy release rate mode components distribution along the crack front. Findings -It was found that the distribution is non-symmetric. The analysis revealed that a wide mixed-mode II/III ratios range can be generated by varying the magnitude of the imposed transverse displacement. The influence of the sandwich core material on the mixed-mode II/III fracture behavior was investigated. For this purpose, three sandwich beam configurations with different rigid cellular foam core were simulated. It was found that the strain energy release rate decreases when the foam core density increases. Originality/value -For the first time, a mixed-mode II/III fracture study of foam core composite sandwich beam is performed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of mixed-mode II/III fracture in sandwich beams

Rizov

2015

Multidiscipline Modeling in Materials and Structures

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“…In this case, the system matrix is an 8 Â 8 matrix. Without going into details, based on equations (9), (10) and (27), the state-space model takes the form of:…”

Section: Fsdt-mindlin Plate Theorymentioning

confidence: 99%

“…However, in the last decades, more and more emphasis was put on the investigation of mode-III. [13][14][15][16][17][18][19][20] fracture, later even the combined mode II/III, [21][22][23][24][25][26][27][28][29] I/III 30,31 and I/II/III [32][33][34] conditions were taken into account. The latest developments for possible acceptable tests under mode-III, [16][17][18] mixedmode II/III 22 and mixed-mode I/III 30 equally involve plate-type specimens with rectangular delamination surface.…”

Section: Introductionmentioning

confidence: 99%

Analysis of classical and first-order shear deformable cracked orthotropic plates

Szekrényes

2013

Journal of Composite Materials

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The Kirchhoff and Mindlin plate theories are applied in this study to calculate the stresses and the energy release rates in delaminated orthotropic composite plates. A novel double-plate system is developed with the imposition of the kinematic continuity constraints in the interface plane. The governing equations of the system were derived in both cases. As a demonstrative example a simply-supported plate subjected to a point force was analyzed using Lévy plate formulation and the problem was solved by a state-space model. The distribution of the stress resultants and the interlaminar stresses in the uncracked part were also determined. Moreover, the distributions of the mode-II and mode-III energy release rates along the crack front were calculated by the J-integral. The 3D finite element model of the plate was created providing reference data for the analytical model. The results show that the displacement and stress fields obtained from the Kirchhoff and Mindlin theories are quite similar, but in the case of the energy release rates, transverse shear effect is necessary to consider to obtain reasonably good agreement between the analytical and numerical results.

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“…They are made by mixing of two or more material constituents in different ratios in different parts of a structural member in order to get optimum performance to external loads. The most important advantage of the functionally graded materials over the laminated composites (Szekrenyes 2010;Szekrenyes and Vicente 2012) is that the composition of the former changes gradually along one or more spatial coordinates. In this way, boundary surfaces and sharp interfaces between different constituent materials are eliminated.…”

Section: Introductionmentioning

confidence: 99%

Delamination fracture analysis of an elastic-plastic functionally graded multilayered beam

Rizov

2017

Int J Mech Mater Eng

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Background: A theoretical study was performed of mode II delamination in a multilayered functionally graded beam configuration with considering the material non-linearity. Methods: The fracture was analysed by the J-integral approach. Two laws (quadratic and exponential) for variation of the modulus of elasticity along the beam height were applied. The J-integral closed form non-linear analytical solutions derived were verified by performing analyses of the strain energy release rate with taking into account the material non-linearity. Parametric investigations of mode II non-linear fracture were conducted. Results: It was found that material non-linearity leads to increase of the J-integral value. Therefore, the non-linear behaviour of material has to be taken into account in fracture mechanics-based safety design of functionally graded structural members. Conclusions: The present paper contributes to the understanding of non-linear fracture in functionally graded materials. The results obtained can be used for optimization of functionally graded beam structures with respect to the fracture performance.

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Interlaminar fracture analysis in the GII–GIII plane using prestressed transparent composite beams

Cited by 28 publications

References 28 publications

Analysis of mixed-mode II/III fracture in sandwich beams

Analysis of mixed-mode II/III fracture in sandwich beams

Analysis of classical and first-order shear deformable cracked orthotropic plates

Delamination fracture analysis of an elastic-plastic functionally graded multilayered beam

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