By Julio F Davalos; An Chen, (College teacher); Pizhong Qiao

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1958), where upper and lower bounds of transverse shear stiffness were obtained with the classical energy method. Among others, Gibson and Ashby (1988) presented the predictions for transverse shear stiffness of hexagonal honeycomb using mechanics of materials and energy methods. Hohe et al. (1999) studied general hexagonal and quadrilateral grid structures by using an energy approach. All these classical mechanics approaches are effective for specific problems of isotropic grid honeycomb, but they become somewhat limited when applied to honeycomb problems with general shapes and anisotropic materials.

3. , 0°/90° or ±45°). Unidirectional layer of fiber bundles or rovings. 3 Lay-up of face laminates. 3582 face laminate may exhibit some extensional-bending coupling effect due to the presence of a ChSM bonding layer. 3) includes two layers of specified bi-ply combination mat (CM-3205) consisting of a 0°/90° SF and a CSM layer, six layers of unidirectional combination mat (UM-1810) consisting of a unidirectional layer and a CSM layer, and one bonding layer (ChSM). 2. The resin used is polyester (UN1866).

33 FRP Deck: Stiffness Evaluation in the same order. It should be pointed out that the homogenization of a 3D periodicity body is different from that of plates with a thickness dimension much smaller than that of the other two. However, when we neglect the warping constraints of a sandwich facesheet, the estimate of transverse shear stiffness can be considered independent of thickness dimension. Therefore, we can rescale the thickness dimension to attain the same periodicity parameter ε, by which the 3D asymptotic expansion (Parton and Kudryavtsev 1993) can be simply adopted in the following derivations, wherein the notation is given with small Latin indices h, i, j, k, l = 1, 2, 3 and small Greek indices α, β, λ = 1, 2.

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