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Multiple smaller, light impacts are better. The heavy concentrated impact can damage and crack the already fragile pavement which has likely lost most of its resilience due to the freezing temperatures. Also, a multiple teeth kind of a roller dragged behind or ahead of a snow shovel truck will break the ice layer into more uniform, smaller shards, turn ...


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I don't think of a screen protector as a mono layer, but a lamination. Deformable (softer) materials (possibly above and also) below the rigid layer (this layer also generally provides adhesion). That way point loads become distributed (potentially to the protector and also) to the device. Example: a thin clear sticky low molecular weight polymer (1), an ...


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Regarding your first question IMHO eigenvalue analysis is appropriate and valid as long as the material is within the elastic range. Also another misconception is that, the application of eigenvalue analysis depend on how close the excitation frequency to the fundamental frequency. (In actuality, IMHO you can regard the cymbals case as an impulse, not as a ...


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It essentially depends on the fracture mechanisms available to the material at the temperature in question. In general, dislocations are more mobile at higher temperatures, enabling plastic deformation and ductile fracture. FCC materials have more slip systems, or ways for dislocations to move, than BCC materials. A metal needs five independent slip systems ...


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Freefall friction-less velocity of an object falling 1 meter is $$ V= \sqrt{2hg}= \sqrt{2g}=4.427m/s $$ This velocity decreases to zero in a short time after the crash, and unless your ball is not a paste it will bounce back up with the same speed in a ping pong manner falling down again. Let's assume you use a horizontal weight, M, n times heavier than your ...


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No, look at it this way: you are removing material that would otherwise help break the fall. All it does is give the mass a chance to penetrate deeper into the drop pad. It would be ok if you add it to existing pad for a thicker pad if you are looking for less noise and less stress to the floor.


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