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  1. LUIGI74

    INFO G(II) TOUGHENING EFFECT

    WHEN I DO END NOTCHED FLEXURAL TEST ON COMPOSITES LAMINATES I MUST DETERMINE THE G(II) [RELEASED ENERGY]. I USE THIS EQUATION: G=(9*P^2*a^2)/(16*E*H^3*B^2) WITH "a" CRACK DIMENSION. WITH THE TOUGHENED EPOXY RESIN I MUST FIND THE G(II) GREATER THAN UNFILLED RESIN? a SECOND QUESTION IN...
  2. LUIGI74

    HELP ON BENDING SANDWICH

    I WORK ABOUT SANDWICH COMPOSITES WITH WOVEN SKIN AND TWO DIFFERENT CORES IN THE MIDDLE OF THE STRUCTURE. ______ SKIN | ______| CORE1 | ______| CORE2 | ______| CORE1 | ______| SKIN | ______| I HAVE FOUND THE EQUATIONS ABOUT A SYSTEM WITH ONLY ONE CORE ON THE CENTER. I DON'T KNOW HOW I CAN...
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