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Originally Posted by SaQSoN
Can you support your claim?
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I doesn't tray to teaching you, but this is motive, why I was asking stupid questions about G and wood/metal plane differences
. The reason, why I was starting this discussion about G is here
http://www.me.mtu.edu/~mavable/Book/Chap1.pdf , please look first 3 pages and Table 1.2 at page 3.This is a Mechanics of Materials section - Stress education materials.
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To my knowledge, wood, being a natural composite, is, actually, less affected by fatigue, then crystalline material such as metal.
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This is not my quotation, its I was find in mechanics related forum where experts explaining how it work based on Mechanics of materials :
1. The tree along fibers behaves as a fragile material, across - as plastic
PS metal material is plastic in both directions.
2. Stability - loss the most artful kind of destruction. It occurs suddenly. The most simple example-ruler(wood) which it is compressed length ways. It resists to the last, then suddenly curved and breaks.
PS Metal ruler doesn't braking in this way.
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I'd really like to see a Wöhler diagram for both wooden composite and aluminum spar of equal terminal strength...
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I agree. The present time wood material (really its a composite) can be equal of metal or better like metal, but I was talking about materials what was used at WW II. Thats not identical like used at present time. The plane is a very complicated mechanics device and flaying is a very stressfully action. So many forces with different strength was work on plane in flight. And if our plane caring bombs and drop its in diving, stress forces increased.