Question: For the constant strain triangular element, show that the stiffness matrix is given by (16.3.16). Equation 16.3.16 [K] = he 4Ae [CH+YC66 BIYI C12+B1Y1C66 YC2+

For the constant strain triangular element, show that the stiffness matrix is given by (16.3.16).
Equation 16.3.16

[K] = he 4Ae [CH+YC66 BIYI C12+B1Y1C66 YC2+ BC66 818 C11 +Y1Y2C66 B2Y1 C12 +1Y2C66 3C11 + Y3C66 8172 C12 + B2Y1C66 883C1+Y1Y3C66 Y1Y2C22 +B1BC66 B2Y2 C12 + B272C66 YC22+ BC66 B3Y1 C12 +B1Y3C66 B2B3C11 +Y2Y3C66 B3Y2C12 + B2Y3C66 8C11 + Y3C66 B173C12 + 83Y1 C66 Y1Y3C22 + B1B3C66 B2Y3C12 + B3Y2C66 Y2Y3C22+ B B3 C66 B3Y3C12+ B3Y3C66 YC 22 + B3C66 (16.3.16)

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