@article{oai:nias.repo.nii.ac.jp:00000274,
 author = {矢島, 浩 and 高, 允宝 and 西川, 和人 and 山本, 元道 and 川市, 克己 and 河野, 隆之 and 井上, 克明},
 issue = {1・2合併},
 journal = {長崎総合科学大学紀要, The Bulletin of Nagasaki Institute of Applied Science},
 month = {Dec},
 note = {Tanks of a spherical tank type LNG carrier are supported by cylindrical shells by the name of "skirt". On the one hand aluminum (Al) alloy (A5083) is used for the upper part of this skirt, on the other hand stainless  steel  (SUS) is used for the lower part. In this case, because Al and SUS are not able to be welded directly, therefore Al/SUS STJ (Structural Transition Joint) is used to connect these two kinds of materials.
　Recently, at Nagasaki Research & Development Center, Mitsubishi Heavy Industries, Ltd., the vac­uum roll bonding method for producing the new-type Al/SUS STJ industrially is developed and investi­gated instead of clad material produced by explosive welding method.
　In this paper, in order to quantify the fracture strength of this new-type Al/SUS STJ produced by the vacuum roll bonding method, a series of round bar tension tests and cruciform welded joint tension tests were performed by using the three kinds of STJ produced under the three conditions. And, in order to in­vestigate the fracture strength and breaking type of this new-type STJ in more detail, three-dimensional elastoplastic FEM analysis was performed. As a result of the investigations described above, the follow­ing conclusions were obtained:
　(1) The faying surfaces of all three kinds of Al/SUS STJ used for the tests have almost equal strength as the tensile strength of Al alloy (R.T. : about 110 N/m㎡, -165℃: about 150 N/m㎡).
　(2) The faying surfaces of all three kinds of Al/SUS STJ used for the tests have the about 3.8 times strength safety factor at -165℃ compared with the overestimated design stress for the skirt of the spherical tank type LNG carrier.
　(3) Plastic deformation of Al alloy part just on the faying surface is restrained by SUS having the higher strength and rigidity because Al and SUS are bonded directly, therefore very high axial stress and hydrostatic stress occurrerd on this Al alloy part of the Al/SUS STJ produced by vacuum roll bonding method.
　(4) This new-type Al/SUS STJ can show the enough strength, because all kinds of fractures are able to occur only after the Al alloy part just on the faying surface is deformed sufficiently.
　(5) All three kinds of Al/SUS STJ used for tests are certified to be practicable for the tank skirt part of a spherical tank type LNG carrier from the viewpoint of the fracture strength.},
 pages = {27--37},
 title = {AI/SUS構造用異材継手接合界面の強度},
 volume = {42},
 year = {2001},
 yomi = {ヤジマ, ヒロシ and コウ, ユンボウ and ニシカワ, カズト and ヤマモト, モトミチ and カワイチ, カツミ and カワノ, タカユキ and イノウエ, カツアキ}
}