Analytical study of a pin-loaded hole in unidirectional laminated composites with triangular and circular fibers

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[1] Robati, Hossein
[2] Attar, Mohammad Mahdi
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Attar, M.M. (Attarmm2010@yahoo.com) | 1600年 / American Society of Mechanical Engineers (ASME), United States卷 / 80期
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The problem of stress concentrations in the vicinity of pin-loaded holes is of particular importance in the design of multilayered composite structures made of triangular or circular glass fibers. It is assumed that all of the fibers in the laminate lie in one direction while loaded by a force p 0 at infinity; parallel to the direction of the fibers. According to the shear lag model; equilibrium equations are derived for both types of fibers. A rectangular arrangement is postulated in either case. Upon the proper use of boundary and bondness conditions; stress fields are derived within the laminate; along with the surrounding pinhole. The analytical results are compared to those of the finite element values. A very good agreement is observed between the two methods. According to the results; composite structures made of triangular glass fibers result in lower values of stress concentrations around the pin; as opposed to those of circular glass fibers. © 2013 American Society of Mechanical Engineers;
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