![]() ![]() The zipper configuration even works with tubes that have different angles of folding. This is just paper, but it has tremendous stiffness.' 'What we want is a structure that is flexible and stiff at the same time. 'We are putting two tubes together in a strange way. 'The geometry really plays a role,' said Professor Paulino, a former Illinois professor of civil and environmental engineering. The structure folds up flat, yet rapidly and easily expands to the rigid tube configuration. They found that interlocking two tubes in zipper-like fashion made them much stiffer and harder to twist or bend. The researchers tried coupling tubes in different configurations to see if that added to the structural stiffness of the paper structures. While the single strip of paper is highly flexible, the tube is stiffer and does not fold in as many directions Roofer who claims vape left him with collapsed lung vows to take legal action against shop which sold him the Easi-Vape e-cigarette.Married Army major who allegedly had sex with two women in the officer's mess at his regiment's summer ball while his wife was sleeping in the same building is suspended. ![]() Race against time to find missing Emile: Desperate hunt for two-year-old French boy two days after he vanished while on holiday with his grandparents in Alpine village.'Hero' maths teacher, 27, 'stabbed in a corridor' at secondary school is recovering back at home - as police arrest boy, 15, on suspicion of attempted murder.Lord Patten's son-in-law was 'getaway driver at an Indian restaurant shooting' in Greenford, west London, court hears.Handler of undercover cop accused of having sex with green activists slept with four women himself, tribunal hears.'A massive amount of astonishing failings and incompetence': Mother whose son was killed by a mentally-ill knifeman in stabbing spree slams authorities after report reveals four missed chances to stop him.MPs approve Partygate committee report as Penny Mordaunt urges 'I live in hope that today will be the end of this sorry affair'. ![]()
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