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

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Formulation of discrete balance laws of single phase in lattice scale for recrystallization 晶格尺度下单相重结晶离散平衡规律的表述
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.1304
M. Muramatsu, Y. Aoyagi, K. Shizawa
{"title":"Formulation of discrete balance laws of single phase in lattice scale for recrystallization","authors":"M. Muramatsu, Y. Aoyagi, K. Shizawa","doi":"10.1299/KIKAIA.77.1304","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.1304","url":null,"abstract":"A crystal lattice in a metal during recrystallization process is modeled as an elastic bar element subject only to stretch and its kinematics is discussed. The balance laws of mass, momentum, angular momentum and energy of the lattice element are formulated. These laws are summed up over a phase in a representative volume element (RVE) and averaged in the RVE so as to prepare to develop macroscopic balance laws for a continuum mixture consisting of several phases. When the RVE converges on a material point at the final procedure of formulation, the present model can be regarded as a director model whose direction vector expressing the crystal orientation is attached to a material point of simple body. During the averaging process, two useful theorems are proposed for averaging terms associated with mass source and then these theorems are verified. Moreover, defining the representative lengths both in macroscopic and microscopic scales and performing an order-estimation for the balance law of angular momentum, this law can be separated into the bulk and lattice parts. The former results in the usual form, so that the Cauchy stress keeps symmetric even though the spin angular momentum of crystal lattice is taken into account. On the other hand, the latter corresponds to the evolution equation of crystal orientation of KWC type phase-field model.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116478417","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: 0
Microscopic fatigue crack behavior in precipitation strengthening stainless steel A286 沉淀强化不锈钢A286的微观疲劳裂纹行为
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.223
S. Hamada, Hao Wu, H. Noguchi
{"title":"Microscopic fatigue crack behavior in precipitation strengthening stainless steel A286","authors":"S. Hamada, Hao Wu, H. Noguchi","doi":"10.1299/KIKAIA.77.223","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.223","url":null,"abstract":"In order to clarify the fundamental fatigue strength characteristic of precipitation strengthening type stainless steel:A286, fatigue tests were performed. In the fatigue test, the authors paid attention to the behavior of microscopic fatigue cracks in order to make clear fatigue strength properties more than those with usual fatigue tests. As a result of the fatigue test, the fatigue strength characteristic of A286 became clear as shown below. The crack of a size according to a crystal grain diameter is easy to initiate and propagate by Mode II. Many cracks initiate and propagate even if the stress is around the fatigue limit and the fatigue crack cannot stop, then the cracks coalesce and it becomes longer, and finally results in a failure. This is the reason why the fatigue failures occur even after 107 cycles.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128695175","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
Effect of pre-strain on low cycle fatigue strength of austenitic stainless steel SUS316NG 预应变对SUS316NG奥氏体不锈钢低周疲劳强度的影响
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.843
Shota Hasunuma, Y. Miyata, T. Ogawa, K. Sakaue
{"title":"Effect of pre-strain on low cycle fatigue strength of austenitic stainless steel SUS316NG","authors":"Shota Hasunuma, Y. Miyata, T. Ogawa, K. Sakaue","doi":"10.1299/KIKAIA.77.843","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.843","url":null,"abstract":"Low cycle fatigue tests were performed for austenitic stainless steel, SUS316NG. The effect of pre-strain history on the crack growth was investigated in detail using cellulose acetate replicas. In strain range, Δe = 2.5 % and 8 % constant tests, cracks initiated from slip bands near grain boundary, while intergranular crack initiations were prevailing when Δe = 16 % constant test. The cracks grew with several coalescences until the final fracture. Pre-strains were applied at Δe = 8 or 16 % followed by fatigue loading at Δe = 2.5 %.These tests revealed that contribution of cyclic strain hardening and softening were remarkable depending on the pre-strain history. Crack growth characteristics were well evaluated by J integral range, ΔJ, which is an elasto-plastic fracture mechanics parameter. Crack growth characteristic under Δe-constant tests as well as the pre-strained tests coincided with that measured by fracture mechanics experiment. Fatigue crack growth rates were predicted by elasto-plastic fracture mechanics approach in conjunction with cyclic stress-strain response.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123492865","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: 13
Detection of Photon Emission during Crack Propagation in Silica Glass by Fast Time-Resolved Measurement 快速时间分辨测量法检测二氧化硅玻璃裂纹扩展过程中的光子发射
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.1028
Yoshitaka Sato, T. Shiota, K. Yasuda
{"title":"Detection of Photon Emission during Crack Propagation in Silica Glass by Fast Time-Resolved Measurement","authors":"Yoshitaka Sato, T. Shiota, K. Yasuda","doi":"10.1299/KIKAIA.77.1028","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.1028","url":null,"abstract":"Fast time-resolved measurement was carried out to detect photon emission (PE) during crack propagation in silica glass. The specimen was fractured by three-point bending at room temperature under 10 -4 Pa. The top and bottom surfaces of the specimen were coated with Au. Resistance of those surfaces was monitored to detect crack propagation in the specimen. Simultaneously, the PE was detected with photomultiplier tube. The PE around 650 nm increased and then gradually decreased during the crack propagation, while the strong the PE around 450 nm was observed at the beginning of the crack propagation. Moreover, both of the emissions started just before the onset of the crack propagation. It might be due to micro-cracks leading to a main crack propagation. The result suggests that a fracture precursor can be detected by monitoring the PE.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116334076","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: 2
Pore collapsed behavior of porous aluminum during compression process by using X-ray CT nondestructive observation 利用x射线CT无损观察多孔铝在压缩过程中的孔隙崩塌行为
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.1025
Y. Hangai, R. Yamaguchi, Shunya Takahashi, T. Utsunomiya, O. Kuwazuru, N. Yoshikawa
{"title":"Pore collapsed behavior of porous aluminum during compression process by using X-ray CT nondestructive observation","authors":"Y. Hangai, R. Yamaguchi, Shunya Takahashi, T. Utsunomiya, O. Kuwazuru, N. Yoshikawa","doi":"10.1299/KIKAIA.77.1025","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.1025","url":null,"abstract":"Closed-cell porous aluminum is a multifunctional material with both lightweight and high energy absorption properties. These properties are considered to be governed by morphology of pores of porous aluminum. In this study, compression test was conducted in the X-ray CT system and deformation process of pores was nondestructively observed during compression. It was shown that deformation process of individual pore can be observed in this system.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133717017","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: 0
アルミニウム合金ダイカストの疲労強度に対する鋳巣の定量的影響評価（第1報，鋳巣と鋳肌の影響に関する実験的検証） 铸巢对铝合金压铸疲劳强度的定量影响评价(1)
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.39
理 桑水流, 村田 陽三, 登雄 宇都宮, 半谷 禎彦, 矢野 貴之, スジット ビダハル, 椎原 良典, 北原 総一郎, 吉川 暢宏
{"title":"アルミニウム合金ダイカストの疲労強度に対する鋳巣の定量的影響評価（第1報，鋳巣と鋳肌の影響に関する実験的検証）","authors":"理 桑水流, 村田 陽三, 登雄 宇都宮, 半谷 禎彦, 矢野 貴之, スジット ビダハル, 椎原 良典, 北原 総一郎, 吉川 暢宏","doi":"10.1299/KIKAIA.77.39","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.39","url":null,"abstract":"Effect of casting defects on the fatigue strength of die cast aluminum alloy was addressed through the tension-compression fatigue test and the X-ray CT inspection, which revealed the amount of porosity included in the specimen. Six types of casting condition were employed to examine the effect of different porosity. Most of fatigue crack sources were the pores. The porosity volume fraction was calculated for all specimens from the three-dimensional X-ray CT images. The fatigue limit of each specimen type was estimated from the fatigue test results. The correlations among fatigue limit, porosity volume fraction, Vickers hardness, and dendrite arm spacing were evaluated, and the result showed that the porosity volume fraction most dominantly affected the fatigue limit in the averaged sense.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123936790","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
Damage detection in CFRP without data from intact structures using statistical analysis of resistance-temperature characteristics 基于电阻-温度特性统计分析的CFRP损伤检测方法
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.181
Yoshiro Suzuki, A. Todoroki, Y. Mizutani, R. Matsuzaki
{"title":"Damage detection in CFRP without data from intact structures using statistical analysis of resistance-temperature characteristics","authors":"Yoshiro Suzuki, A. Todoroki, Y. Mizutani, R. Matsuzaki","doi":"10.1299/KIKAIA.77.181","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.181","url":null,"abstract":"The previous study employs delamination detection in CFRP laminates using statistical analysis of temperature characteristic of resistance to prevent electrical resistance changes caused by damages of electrical contact at electrodes. A statistical analysis method discriminates the temperature characteristic of resistance of the damaged structure from that of the intact structure. To detect delaminations without learning processes, a new method which compares the electrical resistances at high temperature with those at low temperature is developed here. The new method has applicability to existing structures and can also detect initial defects. The present study employs the new method for detecting delaminations and initial defects in quasi-isotropic-plied CFRP plates. The detection limit of delamination and the effectiveness of detecting initial defects are experimentally investigated, and the effect of electrode damage on the diagnosis is discussed here.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126242358","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: 6
Evaluation of transverse crack initiation in cross-ply CFRP laminates under fatigue loading 疲劳载荷作用下CFRP交叉层合板横向裂纹萌生的评价
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.1123
Keigo Takamura, A. Hosoi, N. Sato, H. Kawada
{"title":"Evaluation of transverse crack initiation in cross-ply CFRP laminates under fatigue loading","authors":"Keigo Takamura, A. Hosoi, N. Sato, H. Kawada","doi":"10.1299/KIKAIA.77.1123","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.1123","url":null,"abstract":"In this study, transverse crack initiation in cross-ply CFRP laminates under fatigue loading was evaluated focusing on the transverse crack growth and saturation. The number of cycles that a transverse crack initiates was predicted by the analytical model on the basis of the modified Paris law. In addition, the lower threshold of the transverse crack formation was researched by a modified Paris-law, and the fatigue limit of the transverse crack initiation was evaluated by calculating the stress applied in 90° layer where the increase of the transverse cracks was saturated. Moreover, transverse crack was observed by using scanning electron microscope (SEM) in order to investigate the mechanism of transverse crack initiation. As the results, the analytical results for predicting the transverse crack initiation showed good agreement with the experimental results. Moreover, it was shown that the lower threshold of the transverse crack formation existed, and that the stress applied in 90° layer at saturation state was almost equivalent to the fatigue limit of the transverse crack initiation from the experimental results. From the observation with SEM, it was found that the initiation of the transverse crack under fatigue loading depended on the interface property between fiber and matrix.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"86 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132153397","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
Fatigue limit evaluation of blunt-notched specimen using Δk th value of small crack (1st report: Study on the determination of the initial crack size with annealed carbon steel when stress ratio is zero) 用Δk小裂纹值评价钝缺口试样的疲劳极限(第一次报告:应力比为零时退火碳钢初始裂纹尺寸的测定研究)
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.228
T. Matsueda, Y. Aono, H. Noguchi
{"title":"Fatigue limit evaluation of blunt-notched specimen using Δk th value of small crack (1st report: Study on the determination of the initial crack size with annealed carbon steel when stress ratio is zero)","authors":"T. Matsueda, Y. Aono, H. Noguchi","doi":"10.1299/KIKAIA.77.228","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.228","url":null,"abstract":"The fatigue limit of a blunt-notched specimen is dependent on the fatigue crack initiation limit σw1. σw1 is the propagating limit of the micro fatigue crack at notch root. However, before now no method for evaluating the σw1 based on fatigue crack properties had ever been proposed. In this paper, it is suggested that the initial crack size is dependent on the relationship between the application limit of the characteristic elastic field of the notch and the fatigue crack length measured from the notch root. It is also found that when the initial crack size is given, σw1 can be evaluated from the threshold stress intensity factor range ΔKth .","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132651794","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: 0
Evaluation of Interfacial Strength of Copper Thin Film on Printed Circuit Board with Micro Cutting System 用微切割系统评价印刷电路板上铜薄膜的界面强度
Transactions of the Japan Society of Mechanical Engineers. A Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.970
M. Omiya, I. Nishiyama
{"title":"Evaluation of Interfacial Strength of Copper Thin Film on Printed Circuit Board with Micro Cutting System","authors":"M. Omiya, I. Nishiyama","doi":"10.1299/KIKAIA.77.970","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.970","url":null,"abstract":"The purpose of this paper is to develop the evaluation method of interfacial strengths with a micro cutting system. The interfacial strength of thin films is crucial for the reliability assessment of electronics packages and MEMS devices. There have been a lot of experimental and theoretical studies about the measurement of interfacial strengths. However, it is still under developing stages, because it is quite difficult to measure it quantitatively for micro- and nano-thickness films. Recently, SAICAS(Surface and Interfacial Cutting Analysis System) has been developed and used for the evaluation of the mechanical properties in micro- and nano-thickness films. In this paper, we developed the theoretical model of SAICAS micro cutting tests and proposed the evaluation method of interfacial strength for thin films systems. The proposed method was applied to copper thin films on printed circuit boards and compared with 90° peel tests. The results show that the proposed method can exclude the plastic and friction dissipation energies during the SAICAS tests and quantitatively evaluate the interfacial strength.","PeriodicalId":388675,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. A","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124814998","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
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