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    Fastener Standards for aircraft components

    Hi all, 1) As far as I concern, the most common fastener standards used in aerospace application are coming from either National Aerospace Standard (NAS), Army-Navy Aeronautical Standard (AN) or Mil-Spec (MS). Is it acceptable to use other fastener standard available out there such as DIN, ISO...
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    Coupon Testing and Numerical FEA correlation

    Brian, My intention here are to numerically simulate again the coupon testing and see how the experimental test result goes well with it. I believe if I use the same composite mechanical properties obtained from the experimental (E1, E2, G12, v12), I should be able to obtain its corresponding...
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    Coupon Testing and Numerical FEA correlation

    SWComposites We are now developing new material database for newly formulation of fiber and matrix and need to validate the mechanical properties and strength obtained from the coupon testing. This mechanical and its strength properties will be then used in our complete model simulation.
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    Coupon Testing and Numerical FEA correlation

    Thanks SWComposites and Brian, I have come across this literature which using fracture mechanics approach to capture in-plane fracture energy criterion. This fracture energy derived from numerical FEM using the strength from experimental OHT result. Then, it says that it validate the same...
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    Coupon Testing and Numerical FEA correlation

    Hi all, I have been presented by a set composite coupon testing (using ASTM standard) and need to validate that using numerically using FEA software (in my case, using MSC Nastran/Patran). What is the best parameter to compare with the coupon testing data and numerical FEA results? For...
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    Composite Mechanical Properties from ASTM D3039

    Thanks SWComposites for your suggestion here, to calculate the engineering elastic constants for the laminate. It turns out that the same stiffness for a laminate (Ex, Ey) and lamina (E1, E2) regardless of laminate ply thickness, provided all the orientation are in 0-degree (for Ex = E1) and...
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    Composite Mechanical Properties from ASTM D3039

    Hi all, I have been presented with the coupon test results from ASTM D3039 (Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials). The test have been performed on the few laminate lay up with fiber direction on the 0-degree and 90-degree. How we are going extract...

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