EXPERIMENTAL DETERMINATION OF TRANS LAMINAR FRACTURE TOUGHNESS OF A WOVEN GLASS EPOXY COMPOSITE USING NEW FIXTURE

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KHALIJI VAHID; YAZDANI MOJTABA; CHOPANI NAGHDALI

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Journal: Modares Mechanical Engineering Year:2016 | Volume:15 | Issue:11 Page(s): 330-338

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Title

EXPERIMENTAL DETERMINATION OF TRANS LAMINAR FRACTURE TOUGHNESS OF A WOVEN GLASS EPOXY COMPOSITE USING NEW FIXTURE

Author(s)

KHALIJI VAHID | YAZDANI MOJTABA | CHOPANI NAGHDALI | Issue Writer Certificate

Keywords

TRANS LAMINAR FRACTURE TOUGHNESSQ2

WOVEN GLASS EPOXY COMPOSITEQ2

NEW LOADING DEVICEQ2

TRANS LAMINAR STRESS INTENSITY FACTORQ2

FINITE ELEMENT METHODQ2

Abstract

Cracks in composite structures are the most common damages. For example, cracks in thickness direction (trans laminar fracture) would be due to inadvertent impact of the projectile with the aerospace structures. Most of studies, so far, aimed at studying the interlaminar crack propagation and emergence of the delamination phenomenon. In this paper, in an attempt to study the trans laminar crack propagation of composites, test specimens were prepared in the form of butterfly from a WOVEN GLASS EPOXY COMPOSITE by hand layup and the autoclave process. Experimental fracture tests were performed in the first mode, mixed-mode and the pure second mode by changing the loading angle, using a specially developed fixture, based on Arcan. Load versus displacement curves were obtained. Using critical loads of the tests and the dimensionless stress intensity factors, obtained from the finite element analysis by ABAQUS software, TRANS LAMINAR FRACTURE TOUGHNESS of the composite was determined. As the result, it can be seen that the opening mode TRANS LAMINAR FRACTURE TOUGHNESS is larger than the shearing mode toughness. This means that trans laminar cracked specimen is tougher in tensile loading condition and weaker in shear. Finite element analysis was performed using effective elastic properties of the glass epoxy composite obtained from a homogenized woven composite model based on micromechanics. Finally, the effect of laminate thickness on the TRANS LAMINAR FRACTURE TOUGHNESS behavior of the glass epoxy composite has been studied.

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APA: Copy

KHALIJI, VAHID, YAZDANI, MOJTABA, & CHOPANI, NAGHDALI. (2016). EXPERIMENTAL DETERMINATION OF TRANS LAMINAR FRACTURE TOUGHNESS OF A WOVEN GLASS EPOXY COMPOSITE USING NEW FIXTURE. MODARES MECHANICAL ENGINEERING, 15(11), 330-338. SID. https://sid.ir/paper/177766/en

Vancouver: Copy

KHALIJI VAHID, YAZDANI MOJTABA, CHOPANI NAGHDALI. EXPERIMENTAL DETERMINATION OF TRANS LAMINAR FRACTURE TOUGHNESS OF A WOVEN GLASS EPOXY COMPOSITE USING NEW FIXTURE. MODARES MECHANICAL ENGINEERING[Internet]. 2016;15(11):330-338. Available from: https://sid.ir/paper/177766/en

IEEE: Copy

VAHID KHALIJI, MOJTABA YAZDANI, and NAGHDALI CHOPANI, “EXPERIMENTAL DETERMINATION OF TRANS LAMINAR FRACTURE TOUGHNESS OF A WOVEN GLASS EPOXY COMPOSITE USING NEW FIXTURE,” MODARES MECHANICAL ENGINEERING, vol. 15, no. 11, pp. 330–338, 2016, [Online]. Available: https://sid.ir/paper/177766/en

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