The temporary elastic deformation exceeds the yield strength of the thin/brittle sheet underneath. You can see this on plastic bucket lids too when you place gelatin blocks on those and shoot them. Plywood doesn't suffer any harm.
The temporary elastic deformation exceeds the yield strength of the thin/brittle sheet underneath. You can see this on plastic bucket lids too when you place gelatin blocks on those and shoot them. Plywood doesn't suffer any harm.
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