journal of the Japan Society for Testing Materials最新文献

Revised Design Models for Geogrid Reinforced Soil Walls and LRFD Calibration 土工格栅加筋土墙设计模型修正与LRFD标定

journal of the Japan Society for Testing Materials Pub Date : 2016-01-01 DOI: 10.2472/JSMS.65.40

Y. Miyata, R. Bathurst

引用次数: 0

Development of In-Situ Iron Powder Mixing Treatment with Air Bubbles Using Deep Mixing Method 气泡原位搅拌法处理铁粉的研究进展

journal of the Japan Society for Testing Materials Pub Date : 2016-01-01 DOI: 10.2472/jsms.65.62

Kaoru Tanaka, Tadashi Chuman, K. Nishida, Miura Toshihiko, Yuki Yamada, Takanobu Sato

引用次数: 0

Quantitative Characterization of the Changes in Surface Topography of Austenitic Stainless Steel under Low Cycle Fatigue Loading 低周疲劳载荷下奥氏体不锈钢表面形貌变化的定量表征

journal of the Japan Society for Testing Materials Pub Date : 2015-11-15 DOI: 10.2472/JSMS.64.910

T. Shinko, Takashi Nakamura, N. Fujimura, Yasutaka Nakata

{"title":"Quantitative Characterization of the Changes in Surface Topography of Austenitic Stainless Steel under Low Cycle Fatigue Loading","authors":"T. Shinko, Takashi Nakamura, N. Fujimura, Yasutaka Nakata","doi":"10.2472/JSMS.64.910","DOIUrl":"https://doi.org/10.2472/JSMS.64.910","url":null,"abstract":"Low-cycle fatigue tests of SUS316NG austenitic stainless steel were conducted for several strain ranges (0.76, 1.26, 2.1, 4.1, and 8.1%) in which the specimen’s surface topography was regularly measured using a laser scanning microscope. The surface topographies obtained were analyzed by frequency analysis to separate the surface relief due to persistent slip bands (PSBs) from that due to crystal grain deformation. The PSBs-induced surface relief evolution and the grain-deformation-induced one were quantitatively evaluated by using arithmetic mean roughness Ra and arithmetic mean waviness Wa, respectively. The ΔRa and ΔWa, the increments in Ra and Wa from the initial values, increased with the usage factor (UF) for each strain range. Moreover, the rates of increase in ΔRa and ΔWa with respect to UF increased with the strain range. ΔWa/ΔRa was larger for higher strain ranges. This tendency of ΔWa/ΔRa indicates that the surface relief due to grain deformation develops more prominently than that due to PSBs for larger strain ranges. The results for Ra and Wa agree with the results of surface topography observation. On the basis of these results, a method was developed for estimating the UF of fatigued material and the applied strain range by using only the measured Ra and Wa.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73380768","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

Service Life Prediction of an Aged Bridge Based on Carbonation Tests of Cross-Section Cutting-Off Girders 基于截面截梁碳化试验的老桥寿命预测

journal of the Japan Society for Testing Materials Pub Date : 2015-10-15 DOI: 10.2472/JSMS.64.835

R. Widyawati, A. Miyamoto, H. Emoto, J. Takahashi

{"title":"Service Life Prediction of an Aged Bridge Based on Carbonation Tests of Cross-Section Cutting-Off Girders","authors":"R. Widyawati, A. Miyamoto, H. Emoto, J. Takahashi","doi":"10.2472/JSMS.64.835","DOIUrl":"https://doi.org/10.2472/JSMS.64.835","url":null,"abstract":"This paper presents the details of carbonation tests conducted on cross-section cutting-off girders from a reinforced concrete (RC) bridge and proposes a method to predict the service life of an RC bridge based on the extent of deterioration associated with corrosion of the reinforcing bars due to carbonation and chloride ion attack. Service life prediction is a crucial part of systematization of bridge maintenance. Bridges are typically exposed to a range of environmental conditions over their service lives. Deterioration of RC bridges due to carbonation may occur and may have a significant effect on service life. Chloride ion attack may also influence the deterioration process if the bridge is located close to the sea. Many previous studies have examined the effect of carbonation on RC bridges. However, this paper describes the first known application of carbonation tests to cross-section cutting-off girders from a bridge. A flowchart is presented for the proposed method for predicting the service life of an RC bridge based on the extent of deterioration due to carbonation and chloride ion attack. The results show that the main factor in the deterioration of the bridge has been carbonation and that chloride ion attack has also contributed to the deterioration of the bridge. The end of the service life was defined as the point at which the cumulative amount of steel corrosion reached a critical value of Q = 75 mg/cm 2 . The service life of the bridge was predicted to be approximately 81 years (remaining life of approximately 9 years) on the sea side and mountain side and approximately 142 years (remaining life of approximately 70 years) on the bottom side. The service life for the bottom side was predicted to be longer because of repair work done on the bottom side.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74740625","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

静的強度特性値による機械構造用炭素鋼のS-N 曲線に関する統計的推定静态强度特性值对机械结构用碳钢的S-N曲线的统计估计

journal of the Japan Society for Testing Materials Pub Date : 2015-06-15 DOI: 10.2472/JSMS.64.479

和孝向山, 宏修花木, 憲司岡田, 彰芳境田, 裕紀中村, 淳菅田, 出西川, 明上野, 達雄酒井

引用次数: 2

Proposal of an estimation method of moisture gradient in lumbers based on the eigen-strain methodology 基于本征应变法的木材水分梯度估算方法的提出

journal of the Japan Society for Testing Materials Pub Date : 2015-05-01 DOI: 10.2472/JSMS.64.362

M. Ogawa, Jin Miyazawa

{"title":"Proposal of an estimation method of moisture gradient in lumbers based on the eigen-strain methodology","authors":"M. Ogawa, Jin Miyazawa","doi":"10.2472/JSMS.64.362","DOIUrl":"https://doi.org/10.2472/JSMS.64.362","url":null,"abstract":"Lumbers must be dried to stabilize their shape, to strengthen, and to prevent corrosion and discoloration before using. Since dehydration usually occurs from outer surface, moisture content in inner layers becomes higher than that of outside. Therefore, higher moisture gradient which may cause unexpected deformation and cracks in materials can be seen after drying. Today, there are some non-destructive techniques to measure moisture content but it is difficult to measure moisture gradient in the thickness direction without sectioning. This study aims to propose an estimation method of moisture slope for whole log based on the eigen-strain methodology in which three-dimensional residual stress distributions can be evaluated from released strains on surface. In the proposed method, shrinkage by dehydration is expressed by eigen-stains which are estimated by an inverse analysis from released strains by strain gauges in processing. When released strains due to moisture gradient are obtained in lumber processing of necessity, the process of this method can be regarded as nondestructive, essentially. In order to prove the effectiveness of this method, numerical simulations were carried out for a log with moisture gradient by using FEM (Finite Element Method). In this analysis, a split liner for prevent splitting was conducted to a log to measure released strains on surface. Moisture gradient could be estimated accurately from released strains when moisture gradient in the thickness direction was relatively steep. However, estimation accuracy became poorer when slope of moisture gradient was relatively moderate. In order to improve the estimation accuracy, a log was split in sequential processes and a formulation was attempted by consolidation those sequential histories. And, estimation accuracy could be improved successfully by adopting the sequential manner.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81911037","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

Ni基単結晶超合金のき裂先端変形挙動に及ぼすγ/γ'複合組織の影響 γ/γ’复合组织对Ni基单结晶超合金的断裂尖端变形行为的影响

journal of the Japan Society for Testing Materials Pub Date : 2015-02-15 DOI: 10.2472/JSMS.64.120

Y. Mukai, H. Kagawa, M. Sakaguchi, M. Okazaki

引用次数: 2

Bending Strength of Members in Existing Wooden Check Dams 既有木挡土坝构件抗弯强度分析

journal of the Japan Society for Testing Materials Pub Date : 2015-01-01 DOI: 10.2472/JSMS.64.387

H. Akashi, Takuro Mori, A. Tabuchi, Iwao Miyoshi, Kento Takuma

{"title":"Bending Strength of Members in Existing Wooden Check Dams","authors":"H. Akashi, Takuro Mori, A. Tabuchi, Iwao Miyoshi, Kento Takuma","doi":"10.2472/JSMS.64.387","DOIUrl":"https://doi.org/10.2472/JSMS.64.387","url":null,"abstract":"Construction of wooden check dams in Kyoto prefecture started in 1999, and over 130 wooden dams had been constructed as of 2013. However, these wooden check dams were constructed using members with no preservative treatment, and such members are inevitably subject to a decrease in strength due to deterioration over time. Therefore, in order to maintain wooden check dams, it is essential to evaluate the strength and durability of members in field inspections, to acquire data on secular changes in the strength of the members, and to develop techniques to estimate their strength. Accordingly, we conducted bending strength testing of members sampled from existing wooden check dams and measured them with Pilodyn and Resistograph tests. As a result, we found a negative correlation between the Pilodyn and Resistograph measurements and the bending strength. This result suggests that it will be possible to estimate the bending strength of the members in field inspections by using these techniques designed to measure the deterioration of the members. It was also found that members of wooden check dams tend to undergo deterioration faster at the dam wings or the crest of dam wings than at the dam bodies or the spillway crests, and that the rate of such deterioration varies depending on the wooden check dam.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85942189","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

EBSD Analysis of Grain Strain Distribution for Creep Damaged SUS304HTB 蠕变损伤SUS304HTB晶粒应变分布的EBSD分析

journal of the Japan Society for Testing Materials Pub Date : 2015-01-01 DOI: 10.2472/JSMS.64.88

K. Fujiyama, K. Harada, A. Ogawa, Hirohisa Kimachi

引用次数: 7

Current Methods and Future Developments of Nondestructive Stress Measurement with Two-Dimensional Detectors:I: Current Stress Measurement Methods with Two-Dimensional Detectors 二维探测器无损应力测量的现有方法和未来发展:I:目前的二维探测器应力测量方法

journal of the Japan Society for Testing Materials Pub Date : 2015-01-01 DOI: 10.2472/JSMS.64.599

Y. Sakaida

{"title":"Current Methods and Future Developments of Nondestructive Stress Measurement with Two-Dimensional Detectors:I: Current Stress Measurement Methods with Two-Dimensional Detectors","authors":"Y. Sakaida","doi":"10.2472/JSMS.64.599","DOIUrl":"https://doi.org/10.2472/JSMS.64.599","url":null,"abstract":"回折現象を応用した残留応力測定法は非破壊測定法であり,長年研究機関で研究が進められていると同時に産業界でも製品の品質保証などに広く活用されている.大学の研究室や企業の測定で導入されている装置は特性X線の回折現象の変化をとらえて応力測定を行うものであり,2θ-sin2ψ 法を採用した測定装置が多くの大学や企業で所有されている.2θ-sin2ψ 法を採用した測定装置では検出器の進歩に伴って 0 次元検出器から 1 次元検出器も利用できるようになり,測定時間の短縮も図られて利用しやすい状況になってきている.日本材料学会の X 線材料強度部門委員会では, 2θ-sin2ψ 法を用いた X 線的残留応力測定に対して,ラウンドロビン試験を実施して広く利用していただけるように X 線材料強度部門員会標準として“X 線応力測定法標準(鉄鋼編)”,“X 線応力測定法標準(セラミックス編)”を制定してきた.さらには,X 線応力測定では難しい溶接部の X 線的残留応力測定に対してラウンドロビン試験を実施し,推奨測定手順および条件を X 線材料強度部門委員会報告書として部門委員に配布し活用いただいている.また,特性 X 線の代わりに中性子線を用いた残留応力測定に対して“中性子応力測定法標準”を制定し普及に努めている. 回折線を 2 次元的に評価する手法は 2θ-sin2ψ法が普及する以前から,フィルムを使用して活発に研究されてきていたが,最近では 2次元検出器を備えた X 線残留応力装置が市販装置として各社から販売され,大学でも企業でも導入が進んでいる.しかしながら,まだ広く普及されるには至っておらず,2 次元検出器を用いた残留応力測定の紹介・普及および測定精度の向上を目指し,残留応力の非破壊的評価に携わっておられる研究者・企業の方々,または 2 次元検出器を用いた残留応力評価に興味をお持ちで,今後用いたいと考えておられる方々に対して,2 次元検出器を用いた応力測定法の現状,放射光設備において 2 次元検出器を用いた応力評価法ならびに 2 次元検出器を用いた応力測定法の課題と展望などを講座として紹介する. 1.2次元検出器を用いた応力測定法の現状坂井田喜久(静岡大) 2.放射光を利用した 2次元検出器による応力評価の最前線鈴木賢治(新潟大),菖蒲敬久(原子力機構) 3.2次元検出器を用いた応力測定法の課題と展望坂井田喜久(静岡大),栗村隆之(三菱重工業(株)) X線材料強度部門委員会連載講座担当一同","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76514951","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