Question

This is a materials engineering question. Detailled description needed

Problem 3.17: Explain why it is much easier to push a cork into a wine bottle than a rubber bung. Poisson's ratio is o for cork and 0.5 for rubber.

Answer 1

Poisson when » Zero ratio for cork i good for bottle Stoppers because the cork will not expand one is trying to push it into a bottle opening but a Rubber Used for corking a bottle when you try to push the Rubber Vinto bottle, the part of Rubber right above the lip of bottle will expand radially because of pace poisson's ratio (0.5). This expansion Causes an interference between cork and bottle making it difficult to push in the cork. So, pushing a cork will not cause any radial expansion and cork will slide into the bottle once overcoming Surface friction between und glue without additional force cork Учрӣ , а