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Study of Varying Fiber Orientation and Notch Diameter

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Study of Varying Fiber Orientation and Notch Diameter in Semicircular Side-Notched Composite Laminates Under Static Loading


The use of composites materials is rapidly increasing in the aerospace field due to a high strength to weight ratio. There is a high demand for the replacement of many industry standard metallic structural components for their lighter composite material counterparts. Laminated composite semicircular side-notched plates are an example and have a wide range application— reducing weight when needed and allows for access to other parts of a complex structure or system. However, the presence of a semicircular side-notch or sudden change in geometry leads to localized high stress regions called stress concentrations when subject to loads. These non-uniform, high stress concentrations on loaded laminated composited semicircular side-notched panels can lead to failures, such as fatigue cracking and plastic deformation.Although much research and data is available for isotropic side-notched plate design, there is significantly less literature existing that categorizes the behavior of composite semicircular side-notched panels. The composite specimens were constructed from uniaxial carbon fiber tape and tested using an Instron machine under axial tensile loading. Numerical results were found using ANSYS finite element analysis software for micromechanical composite behavior. Through experimental and numerical analysis, this paper will study the effects and failure modes of varying fiber orientation and notch diameter by examining stress at failure for composite laminate notched plates.


Author: Jason C. Starnes, Bradley S. Schab, Christopher L. Ostrom, and Eltahry I. Elghandour


Conference: SAMPE Seattle 2017


SKU/Code: SE17--0488

Pages: 9

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