mechanics of aircraft structure

mechanics of aircraft structure - 구조역하및 실험...

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Unformatted text preview: 구조역하및 실험 Problem Solution – Homework #4 4.1 Solution : Vertical distances between the centroid and the origin Moments of Inertia Assume ≪ h where Stress Maximum positive stress Maximum negative stress Hence, the absolute maximum stress is Neutral axis is located along σ xx = 0 4.2 Solution : Rotation Assume ≪ h Moment of Inertia Stress Maximum positive stress Maximum negative stress Absolute maximum stress Neutral axis is located along σ xx = 0 Neutral axis coincides with the centroidal axis. Load capacity compared to the original section for the same maximum bending stress 4.3 Solution : a) Figure 4.20 Since it is symmetrical, the centroid is located at the middle of the vertical web. Moment of inertia Bending Stress: M y ≠ , M z = 0 b) Figure 4.21 Since it is symmetrical (when neglecting the effects of webs), the sentroid is located at the center of the sections....
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mechanics of aircraft structure - 구조역하및 실험...

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