膨脹式救命いかだ接着部強度の経年劣化について : 波浪による繰り返し荷重が作用した場合

概要

論文の詳細を見る
The strength of aged inflatable life rafts has been investigated with pressure test for main air tubes. But, according to a few investigations of damaged drift inflatable life rafts after shipwreck, the most reasons of damage occurrence depend on shortage of adhesive strength between two air tubes. The strength of air tubes would be stronger with the static tension by air tube pressure test, compared with the tearing force at the adhesive parts. And, the adhesive parts of aged life raft may be broken by crumpling force of waves during drift. Therefore, several tests were conducted to know the forementioned effects for the four kinds of inflatable life raft aged 0 to 20 years. The main results are as follows; (1) Tearing tests of adhesive test pieces of main tubes are effective to know the strength shortage of aged inflatable life raft compared with pressure test for main air tubes. (2) The tearing strength will be decreased after adding repeated tensile stress corresponding to wave force during drift on the sea.
社団法人日本航海学会の論文
1997-03-25