1 Suppose The Off Axis Layers In The Tube Of Failure Example 1 Were At 30 Instead Of 20 A Based On The Tsai Wu C 1 (95.74 KiB) Viewed 23 times
1. Suppose the off-axis layers in the tube of Failure Example 1 were at ±30° instead of ±20°. (a) Based on the Tsai-Wu criterion, what would be the axial load capacity of the tube? (b) Would the failure mode and the layers that control failure be the same as when the fibers were at ±20°? (To answer this question you essentially must redo the example problem, starting with the stresses due to P = 1 N, i.e., Table 9.2.) (c) Compare the results with the predictions of the maximum stress criterion, Exercise 1 in the Exercises for Section 9.2.
+20° -20° FIGURE 9.8 Tube with axial load P, Failure Example 1 H = 1.50 mm P R = 25.0 mm
TABLE 9.2 Principal material system stresses (Pa) in axially loaded tube for P = 1 N Layer 01 02 712 +20° +3830 -112.3 -148.7 -20° +3830 -112.3 +148.7 0° +4770 -168.6 0
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