Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Shota HASUNUMA"'
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 930, Pp 23-00280-23-00280 (2024)
It is difficult to predict the earthquake loading so the effect of pre-strain on fatigue strength was required to investigate. Especially, surface shape was changed when large plastic strain was applied. Strain concentration may be occurred by this s
Externí odkaz:
https://doaj.org/article/257d5b32d7cc490b84337cd88abf69bb
Publikováno v:
Mechanical Engineering Journal, Vol 6, Iss 2, Pp 18-00545-18-00545 (2019)
In this study, we investigated the mechanism of the indentation size effect for Ti, whose crystal structure is hexagonal close-packed. Indentation tests were performed for two types of single-crystal Ti with different crystal orientations: (0001) and
Externí odkaz:
https://doaj.org/article/ab341fee769049b3ba5e76ccae986288
Autor:
Shota HASUNUMA, Takeshi OGAWA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 84, Iss 863, Pp 18-00151-18-00151 (2018)
In this study, the applicability of cumulative damage law for carbon steel, STS410, was investigated. In addition, prediction method of low cycle fatigue life based on small crack growth was researched. First, low cycle fatigue tests under two step v
Externí odkaz:
https://doaj.org/article/c0b04a8ae3374615a26578c9f78983b7
Publikováno v:
Mechanical Engineering Journal, Vol 5, Iss 2, Pp 17-00638-17-00638 (2018)
In this study, we investigated the mechanism of the indentation size effect based on measurement of the geometrically necessary (GN) dislocation density. The GN dislocation density was measured around impressions by electron backscatter diffraction (
Externí odkaz:
https://doaj.org/article/2ed57b25127b40768360b0d9bf6081b7
Autor:
Takayuki KURAMITSU, Tatsuya FUJII, Shota HASUNUMA, Takeshi OGAWA, Myunghun WOO, Masahiro TAKANASHI
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 83, Iss 850, Pp 17-00066-17-00066 (2017)
The purpose of this study is to investigate low cycle fatigue (LCF) and high cycle fatigue (HCF) strengths, crack initiation and growth behaviors of Ni based castalloy 246. LCF and HCF tests are conducted under load controlled conditions. As the resu
Externí odkaz:
https://doaj.org/article/ba13c389ad7246ed9603adeede3b1215
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 83, Iss 846, Pp 16-00264-16-00264 (2017)
In this study, the effect of machined surface layer on residual stress relaxation was investigated. In previous study, low cycle fatigue strength was affected by residual stress. However, residual stress relaxation was complex because local plastic s
Externí odkaz:
https://doaj.org/article/0e0d3caf44a74e73a93abd048eaaeb13
Publikováno v:
Journal of the Society of Materials Science, Japan. 69:882-888
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65167b9441a33ddb08f1f226940b9226
https://doi.org/10.2472/jsms.69.882
https://doi.org/10.2472/jsms.69.882
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 82, Iss 840, Pp 16-00183-16-00183 (2016)
Low cycle fatigue tests were performed for austenitic stainless steel, SUS316L. The effect of machined surface layer on low cycle fatigue life was investigated. In order to separate the effect of surface morphology and material property variations, f
Externí odkaz:
https://doaj.org/article/4159fcf9f2154e2da3a2b3936af7632d
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 81, Iss 832, Pp 15-00328-15-00328 (2015)
The effect of processed surface condition on low cycle fatigue life of Ni based super alloy, Alloy 718, was investigated. Observation of turning surface indicates that the roughness is fairly small, i.e. Ra < 1 μm, however, many scratch are found. C
Externí odkaz:
https://doaj.org/article/6903dd80cade4c5c802bad1378327332
Autor:
Shunsuke Kato, Kazuo Miyagawa, Yuta Nakamura, Shunpei Suzuki, Satomi Mano, Takeshi Ogawa, Shota Hasunuma
Publikováno v:
MATERIALS TRANSACTIONS. 60:2346-2352
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4522099fe7eab8814e1ad228fb3e04f5
https://doi.org/10.2320/matertrans.z-m2019845
https://doi.org/10.2320/matertrans.z-m2019845