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perpendicular compression fail
correct answer: "The application of a hardened wooden edge to a brittle bone will not slice the bone, which means a localised shearing of fibres, it will crack and crush the bone, involving a distribution of impact forces onto the extended shape of the bone, not the local impact point. The...- historian
- Post #4
- Forum: Student Engineer General Discussion
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perpendicular compression fail
"Growing in desert conditions leave these [Australian] woods with a hardness and density comparable to desert ironwood. Gidgee (Acacia cambadgei) – Janka Hardness Scale – 4270 Mulga (Acacia aneura) – Janka Hardness Scale – 3820 (NOTE: I’ve seen many references to this wood being used as a...- historian
- Post #3
- Forum: Student Engineer General Discussion
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perpendicular compression fail
New York Times and others have published that wood slices skull-bone. https://www.nytimes.com/2016/10/18/science/first-boomerang-victim-australia.html Steel compression fail is 100-350Mpa, wood is 1.2-20 Mpa and skull-bone 170-200Mpa.If wood can be surface fire-hardened so that a sharp edge...- historian
- Thread
- Replies: 3
- Forum: Student Engineer General Discussion
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meander bend force in estuary
I'm looking for confirmation of meander bend force. This early map may show an island in a bay. ...- historian
- Thread
- Replies: 0
- Forum: Student Engineer General Discussion
