Transactions of the Japan Society of Mechanical Engineers. A最新文献

Grain boundary inclination dependence of GN dislocation patterns and density in bicrystal model 双晶模型中GN位错模式和密度对晶界倾角的依赖

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2015-11-27 DOI: 10.1299/TRANSJSME.14-00630

Yoshiki Kawano, N. Tamaru, S. Ishii, T. Mayama, Ryouji Kondou, T. Ohashi

{"title":"Grain boundary inclination dependence of GN dislocation patterns and density in bicrystal model","authors":"Yoshiki Kawano, N. Tamaru, S. Ishii, T. Mayama, Ryouji Kondou, T. Ohashi","doi":"10.1299/TRANSJSME.14-00630","DOIUrl":"https://doi.org/10.1299/TRANSJSME.14-00630","url":null,"abstract":"Deformation behaviors of polycrystalline metals are quite complex, and we are not easy to directly investigate them; thus, analyses employing simple models such as bicrystals are required. In this study, we conducted crystal plasticity analysis of unidirectional tensile tests, using compatible-symmetric-type bicrystal models with the not-inclined grain boundary and incompatible-type bicrystal model with the inclined grain boundary; we investigated changes in patterns of geometrically necessary dislocation (GND) bans and the density of GNDs in the initial deformation. In the condition where the grain boundary contacted with the constrained faces, GND bans were formed and the distribution was changed with changing the inclination angle α of the grain boundary. In contrast, GNDs were not localized in high density in the condition where the grain boundary contacted with the free surfaces; the changes were caused by two-reasons: one was changes of compatibility of the bicrystal model with changing the inclination angle α, and the other was that deformation shapes of the bicrystal model under tensile loading were changed with changing the inclination angle α and the deformation was constrained by the constrained faces. The compatibility of and average density of GNDs in the bicrystal model could be estimated using differences of components of Schmid tensors between the crystal grains.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132409466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

高温場に挿入されたポリエチレンフィルムの着火・燃焼特性（第1報：着火遅れ時間，燃焼時間に及ぼすフィルム寸法の影響）插入高温场的聚乙烯薄膜的着火、燃烧特性(第1报:着火延迟时间，薄膜尺寸对燃烧时间的影响)

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2015-08-05 DOI: 10.1299/TRANSJSME.15-00187

光佑池田

引用次数: 0

20102 Damage Process of Ceramic Thermal Barrier Coatings Exposed at High Temperature under Tensile Loading 陶瓷热障涂层在拉伸载荷下高温暴露的损伤过程

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2015-03-20 DOI: 10.1299/JSMEKANTO.2015.21._20102-1_

Yuto Shimizu, M. Arai, T. Suidzu

引用次数: 0

長周期・大振幅地震動の測定を可能にする小型絶対変位振動計の開発研究（達成された成果について）能够测量长周期、大振幅地震的小型绝对位移振动仪的开发研究(关于已取得的成果)

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2015-01-20 DOI: 10.1299/TRANSJSME.14-00555

一登背戸, 雄一岩崎, 充弘宮崎, 亨渡辺

引用次数: 0

Detection of fatigue damage in stainless steel by EBSD analysis (analysis focused on grain boundaries) 基于EBSD分析的不锈钢疲劳损伤检测(晶界分析)

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-12-01 DOI: 10.1299/KIKAIA.79.1690

M. Kuroda, M. Kamaya, Takayuki Mori, T. Izaki

引用次数: 3

Effect of displacement velocity on elastic plastic fracture toughness of SM490B carbon steel plate in 0.7 MPa hydrogen gas 位移速度对0.7 MPa氢气中SM490B碳钢板弹塑性断裂韧性的影响

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-10-15 DOI: 10.1299/KIKAIA.79.1210

Takuya Matsumoto, H. Itoga, Sana Hirabayashi, M. Kubota, S. Matsuoka

{"title":"Effect of displacement velocity on elastic plastic fracture toughness of SM490B carbon steel plate in 0.7 MPa hydrogen gas","authors":"Takuya Matsumoto, H. Itoga, Sana Hirabayashi, M. Kubota, S. Matsuoka","doi":"10.1299/KIKAIA.79.1210","DOIUrl":"https://doi.org/10.1299/KIKAIA.79.1210","url":null,"abstract":"©2013 The Japan Society of Mechanical Engineers The elastic-plastic fracture toughness, JIc, of SM490B carbon steel plate was investigated in air and 0.7 MPa hydrogen gas. JIc tests were conducted in accordance with the JSME standard, JSME S001 (1981). JIc was much smaller in hydrogen at a displacement velocity of V = 2 × 10 mm/s (JIc = 10.0 kJ/m) than in air at V = 2 × 10 mm/s (JIc = 248.6 kJ/m). JIc in air does not satisfy the validity requirement. In hydrogen, surprisingly, a further decrease in V did not decrease JIc, but increased it. JIc in hydrogen at V = 2 × 10 mm/s was 60.9 kJ/m. The large and small values of JIc in air and hydrogen corresponded to the fracture morphology. In air at V = 2 × 10 mm/s, a critical stretched zone, SZWc, was formed at the tip of the fatigue pre-crack, followed by dimples. In hydrogen at V = 2 × 10 mm/s, quasi-cleavage instead of SZWc and dimples were formed at the pre-crack tip. In hydrogen at V = 2 × 10 mm/s, SZWc was formed at the precrack tip, followed by dimples again. This elastic-plastic fracture toughness behavior was analyzed assuming HESFCG (hydrogen-enhanced successive fatigue crack growth), which is proposed by the authors to explain the acceleration of fatigue crack growth rate in the presence of hydrogen. The elastic plastic fracture toughness test shown in 0.7 MPa hydrogen gas at V = 2 × 10 mm/s is the same as that shown in a fatigue crack growth test in 0.7 MPa hydrogen gas at a number of cycles of n = 1 and stress ratio of R = 0; and thus JIc in 0.7 MPa hydrogen gas at V = 2 × 10 mm/s is not the real elastic-plastic fracture toughness. We conclude that the real elastic-plastic fracture toughness in 0.7 MPa hydrogen gas can be determined by fracture toughness testing in 0.7 MPa hydrogen gas at V = 2 × 10 mm/s.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128873061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Observation of the fracture behavior in A1050-ADC12 functionally graded porous aluminum under impact compression A1050-ADC12功能梯度多孔铝冲击压缩断裂行为观察

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-10-15 DOI: 10.1299/KIKAIA.79.1076

N. Kubota, Kousuke Saito, Y. Hangai, T. Utsunomiya, T. Ishima, H. Kawashima, O. Kuwazuru, N. Yoshikawa

引用次数: 0

Detection of fatigue damage in stainless steel by EBSD analysis (comparison with TEM observation) 用EBSD分析检测不锈钢疲劳损伤(与透射电镜观察对比)

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-10-15 DOI: 10.1299/KIKAIA.79.1102

M. Kuroda, K. Yasunaga, M. Kamaya, Teruaki Yamada

引用次数: 3

Stress analysis of a light-cured composite resin due to polymerization shrinkage 光固化复合树脂聚合收缩应力分析

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-10-10 DOI: 10.1299/KIKAIA.79.1406

K. Arakawa, Sane Jae Yoon, M. Nishimura

引用次数: 0

Time-dependent deformation of CFRP quasi-isotropic laminates caused by relaxation of thermal residual stress and physical aging 热残余应力松弛和物理老化引起的CFRP准各向同性层合板的时效变形

Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2013-08-19 DOI: 10.1299/KIKAIA.79.950

Tomoyuki Niwa, Y. Arao, H. Kawada

{"title":"Time-dependent deformation of CFRP quasi-isotropic laminates caused by relaxation of thermal residual stress and physical aging","authors":"Tomoyuki Niwa, Y. Arao, H. Kawada","doi":"10.1299/KIKAIA.79.950","DOIUrl":"https://doi.org/10.1299/KIKAIA.79.950","url":null,"abstract":"In this paper, time-dependent dimensional change in quasi-isotropic laminates induced by relaxation of thermal residual stress and physical aging was predicted by the classical lamination theory. CFRP with pitch-based carbon fiber and cyanate ester resin was chosen for the study. Viscoelastic properties were investigated by performing tensile creep test for unidirectional laminates in the transverse direction. In addition, shrinkage strain induced by physical aging was studied by measuring the strain change of unidirectional laminates as well. Shrinkage strain in off–axis layers was calculated by using the coordinate-transform method. Shrinkage strain in 60° and 45° laminates were measured and the results were compared with the calculation. From the comparison, it was found that shrinkage strain of off-axis layers can be calculated by using the coordinate-transform method. Experimental results were applied to the classical theory in order to predict the time-dependent dimensional change of quasi-isotropic laminates. The strain change in quasi-isotropic laminates was obtained experimentally, and the result was compared with the prediction. It was verified that the time-dependent deformation of quasi-isotropic laminates can be predicted with a -order by using proposed prediction method.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125357187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1