journal of the Japan Society for Testing Materials最新文献_第5页

X-Ray Stress Measurement for Rolled Magnesium Alloy AZ61 Made by Twin-Roll Casting 双辊铸造AZ61镁合金轧制的x射线应力测量

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.539

K. Yatsushiro, D. Suzuki, M. Sano, Teruo Ishiguro, Yukari Mitsui, C. Sakamoto, Tomomi Ito, H. Katagiri

引用次数: 1

Dry Fabric Forming Analysis Considering the Influence of Tensions on In-plane Shear Behavior 考虑张力对面内剪切性能影响的干织物成形分析

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.380

Masato Nishii, T. Hirashima, T. Kurashiki

{"title":"Dry Fabric Forming Analysis Considering the Influence of Tensions on In-plane Shear Behavior","authors":"Masato Nishii, T. Hirashima, T. Kurashiki","doi":"10.2472/JSMS.63.380","DOIUrl":"https://doi.org/10.2472/JSMS.63.380","url":null,"abstract":"In this study, we propose a FE model for dry fabric forming simulation that can express the tension dependent shear behavior in order to predict the wrinkles, one of the major forming defects. Automakers are gradually using more carbon fiber reinforced plastic (CFRP) in mass production cars, because the development of resin transfer molding (RTM) have reduced its cycle time to less than 10 minutes. Finite element analysis (FEA) is essential to the vehicle design process, so numerical simulation of CFRP is strongly desired today. Forming simulation is especially important, because the performance of the final composite part strongly depends on changes in fiber orientation during the preforming. Moreover wrinkle is one of the major defects in preforming. RTM usually involves fabric reinforcement. During forming of fabric, large in-plane shear deformations typically occur. The reason for this is that the shear resistance is very low at the initial stage, because the deformation is governed by yarn contact friction at the cross-sections. Accurately expressing the in-plane shear behavior of fabric is very important for accurate forming simulation. In most simulation models the shear resistance of fabric is assumed to be independent from the tension along the yarn. However, meso-model predictions of the picture frame and bias-extension tests suggest this to be an invalid assumption. In this study, a micromechanical model that introduces the stress component due to the yarn rotational friction is adapted to the dry fabric forming simulation. In other words, this can express the shear behavior that depends on the tensions in the yarns. The results using this micromechanical model are in good agreement with the meso-model results in the various boundary conditions.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87056630","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: 10

Prediction of Liquefaction and Countermeasure due to Groundwater Lowering Method in Osaka and Wakayama Plains 大阪和歌山平原地下水降压液化预测及对策

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.614

Akihiko Oshima, Y. Hayashi, T. Hamada, Mari Kasugai

引用次数: 0

Deterioration Progress of Cement-Treated Ariake Clay under Seawater 海水作用下水泥处理有明黏土的劣化过程

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.49

H. Hara, D. Suetsugu, S. Hayashi, H. Matsuda

{"title":"Deterioration Progress of Cement-Treated Ariake Clay under Seawater","authors":"H. Hara, D. Suetsugu, S. Hayashi, H. Matsuda","doi":"10.2472/JSMS.63.49","DOIUrl":"https://doi.org/10.2472/JSMS.63.49","url":null,"abstract":"1 緒言粘土に石灰やセメントを混合して,変形・強度特性を改善させる固化処理工法は,軟弱地盤対策や建設発生土の改良に利用されており,軟弱地盤が広く分布するわが国では主要な工法となっている.しかしながら,固化処理土は使用環境次第では,その性質が劣化することが明らかになってきており,1)~ 3)長期的な耐久性に関する検討が望まれる.著者らは現在までに室内試験より海水の影響による固化処理土の性質変化や劣化機構の解明に関する研究を行ってきている.4)~ 6)今後,沿岸域ならびに河川の感潮域において造成された固化処理地盤を長期に亘って供用していくためには,海水に対する耐久性を明らかにする必要がある. 本論文では,海水環境下におけるセメント処理土の劣化の進行について実験的に検討する.劣化の進行には, 種々の要因が影響すると予想されるが,既往の研究成果から劣化の主要な原因となる接触する海水の濃度,固化材添加量をパラメータとして有明粘土を母材としたセメント処理土の劣化した範囲を実験的に調べた.得られた結果から,海水濃度と固化材添加量の影響を考慮した海水環境下におけるセメント処理土の劣化速度の実験式を提案した. 2 実験概要著者らは現在までの研究成果から,処理土の劣化の進行はセメントの種類にかかわらず,同程度であることを実験的に確認している.7), 8)本論文における実験では,一般的な固化材である普通ポルトランドセメント(以下単にセメント)を使用した.試料土には,佐賀県小城市の感潮河川の河口域に堆積した有明粘土を用いた.試料土の物性を Table 1に示す.粘土と固化材を均質に混合するために試料土の含水比を液性限界の 1.5倍 (w = 237.2%) に調整して使用した.固化材の添加量は 50, 70, 100kg/m3である.含水比を調整した試料土に固化材を添加し,ミキサーで十分に混合したものを φ = 50mm,H = 100mmのプラスチック製円筒形モールドに空気が入らないようにタッピングしながら充填した.その後,供試体表面の乾燥および酸化を防ぐために余盛りしてラップで覆い,恒温恒湿器にて温度 20°C,湿度 80%の条件で 28日間養生した. 海水環境下におけるセメント処理した有明粘土の劣化の進行に関する検討原弘行末次大輔林重徳松田博 Deterioration Progress of Cement-Treated Ariake Clay under Seawater","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84701380","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

The Effects of Fine Particle Peening on Surface Residual Stress of a TRIP-Aided Bainitic Ferrite Steel 细颗粒强化对trip辅助贝氏体铁素体钢表面残余应力的影响

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.662

Masahiro Natori, Sung-Moo Song, K. Sugimoto

引用次数: 9

Permeability Test and Hydraulic Conductivity of Improved Soils by Deep Mixing Method 深层搅拌法改良土的渗透性试验及导流性能

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.28

Kazuaki Hioki, Shumpei Iwanaga, Atsushi Hashimoto, Shigehiro Murakami

引用次数: 2

Fatigue Limit Estimation Based on Dissipated Energy Measurement for Shot Peened SUS 316L Steel 喷丸强化sus316l钢疲劳极限耗散能估算

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.850

T. Inagawa, D. Shiozawa, A. Akai, K. Inaba, T. Sakagami

{"title":"Fatigue Limit Estimation Based on Dissipated Energy Measurement for Shot Peened SUS 316L Steel","authors":"T. Inagawa, D. Shiozawa, A. Akai, K. Inaba, T. Sakagami","doi":"10.2472/JSMS.63.850","DOIUrl":"https://doi.org/10.2472/JSMS.63.850","url":null,"abstract":"近年,機器の軽量化や,コンパクト化,製品寿命向上の要求により,厳しい使用条件に耐えうる材料強度の向上のために表面処理が構造部材に施されている.金属材料の表面改質処理法の一つとして,ショットピーニング処理が広く用いられている.ショットピーニング処理とは,ショットと呼ばれる投射材を金属材料表面に投射することで圧縮残留応力および加工硬化を与えることにより母材の疲労限度を向上させる手法である.同手法については疲労限度の上昇要因である圧縮残留応力,加工硬化と同時に,疲労限度の低下要因である表面粗さや圧痕も付与されてしまうため,疲労寿命が向上する一方で, 処理条件によっては逆に低下するという報告がある . そこで,ピーニング処理を行った表面改質材に対して迅速かつ簡易に疲労限度の推定を行うことができれば,有用なツールとなり得る. これまでのピーニング材に対する疲労特性の評価法として,村上らは圧痕を介在物と等価と考え,最大圧痕部の投影面積から疲労限度を推定する√ パラメータモデルと基地組織の硬さおよび圧縮残留応力から複合的に疲労限度予測をした結果を述べている.また三林らは疲労き裂進展解析を基礎とした破壊力学的観点から疲労限度を推定している.政木らは圧縮残留応力および半価幅硬度分布と応力拡大係数を考慮して,ハードショットピーニングされた SUS316L 鋼の内部き裂起点の疲労限度を推定している.このようにピーニング材に対して種々の疲労限度推定法が考案されてきた. 一方で近年,散逸エネルギ測定に基づく疲労限度推定法が注目されている.この手法は測定対象が繰返し負荷を受けた場合に放出される散逸エネルギに起因する不可逆発熱成分を赤外線サーモグラフィにより測定し,様々な大きさの応力振幅に対する散逸エネルギの変化から疲労限度を評価する手法である.著者ら ~ は,これまでに,炭素鋼 S45C やオーステナイト系ステンレス鋼に対する本疲労限度推定法の適用性,さらには散逸エネルギと疲労損傷メカニズムの関係について明らかにしてきた. 本報では,ショットピーニング処理を施した SUS316L 鋼試験片に対して,散逸エネルギに基づく疲労限度推定法を適用し,表面改質材に対する本疲労限度推定法の適用性について検討を行った.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82226657","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

Lead Removal By Scallop Shell Used for Crystallization Phosphorus Removal 结晶除磷用扇贝壳除铅

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.442

K. Yoshimura, H. Shiomi

{"title":"Lead Removal By Scallop Shell Used for Crystallization Phosphorus Removal","authors":"K. Yoshimura, H. Shiomi","doi":"10.2472/JSMS.63.442","DOIUrl":"https://doi.org/10.2472/JSMS.63.442","url":null,"abstract":"Previously, we reported that on immersing the composite of crashed scallop shells and gypsum into KH 2 PO 4 aqueous solution, DCPD(CaHPO 4 ・ 2H 2 O) crystal precipitated on the surface of the composite and grew with increasing immersion time. In this study, the feasibility of using the scallop shells with DCPD precipitate after phosphate ion removal as an adsorbent of lead in waste water was evaluated. When the scallop shells with DCPD precipitate were immersed in an aqueous solution containing 50ppm Pb 2+ at pH3, the concentration of Pb 2+ in the solution deceased with increasing immersion time. The Pb 2+ removal rate largely depended on the amount of DCPD precipitate on the surface of the scallop shells and increased with the amount of DCPD precipitate. From the results of SEM observation, EDX and XRD analysis, it was found that after immersing scallop shells with DCPD precipitate in the Pb2+ aqueous solution, DCPD converted into HAP(Ca 10 (PO 4 ) 6 (OH) 2 ) and hydroxypyromophite(Pb 5 (PO 4 ) 3 OH, HPY) whisker precipitated on the surface of HAP crystal. When DCPD converts into HAP, surplus PO 43- ions dissolve into the solution and react with Pb 2+ ions to form Pb 5 (PO 4 ) 3 OH. There results show that the scallop shells used for the adsorbent of phosphate ions would be reused as the adsorbent of lead in wastewater.","PeriodicalId":17366,"journal":{"name":"journal of the Japan Society for Testing Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75244845","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

Stiffness Reduction Process of CFRP under the Cyclic Bending Deformation 循环弯曲变形作用下CFRP的减刚度过程

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.641

Yoshinori Yamada, T. Kadowaki, Toshihiko Sumiya, Masahiko Hata

引用次数: 0

The Effect of PVA Addition on the Microstructure of the Porous Zirconia Ceramic by Unidirectional Freeze Casting PVA添加量对单向冷冻铸造多孔氧化锆陶瓷组织的影响

journal of the Japan Society for Testing Materials Pub Date : 2014-01-01 DOI: 10.2472/JSMS.63.437

Koichi Itoi, H. Shiomi

引用次数: 4