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It is reminded that these results are obtained only for loading case (b).
Through the thickness distribution of the interlaminar normal stress σ z for [90°/90°/0°/0°] layup is displayed in Fig. 7 for loading case (a).
Interlaminar normal stress along the 90°/90° interface of [0°/0°/90°/90°] laminate for loading case (a) is displayed in Fig. 6.
Figure 4 shows the numerical value of σ z at exactly y = b versus p value for both [0°/90°/0°/90°] and [0°/90°/90°/0°] laminates for loading case (a).
Next, in order to assess the accuracy of LWT, the results of LWT are compared here within those of elasticity solution as developed in the present study for loading case (b) [see Eq. (20) and the boundary conditions in Eq. (35)].
Open image in new window Fig. 4 Convergence of σ z at y = b and mid-plane of [0°/90°/0°/90°] and [0°/90°/90°/0°] layups for different values of subdivisions (p). Figure 5 displays the distribution of the interlaminar stresses along the 90°/0° interface of [90°/90°/90°/0°] layup for loading case (a).
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The results show that our model cannot only be used for loading cases with small strains but also with large strains.
The non-linear buckled shape for both load cases is shown in Fig. 13 for Load Case IA and Fig. 14 for Load Case IB.
Open image in new window Fig. 13 Displacement contour plot for Load Case IA perpendicular thrust load Open image in new window Fig. 14 Displacement contour plot for Load Case IB diagonal thrust load.
For Load Case IB, the design load is well within the linear part of the graph; however, for Load Case IA it is located in a region where the stiffness begins to decrease slightly.
Open image in new window Fig. 18 Contour plot for the von mises stress for Load Case IA.
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