Jsme International Journal Series A-solid Mechanics and Material Engineering最新文献_第10页

Processing and Functional Evaluation of Titanium Thin Films for Biomimetic Micro Actuator 仿生微驱动器用钛薄膜的制备及功能评价

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.451

T. Sakai, Sodai Hoshiai, E. Nakamachi

{"title":"Processing and Functional Evaluation of Titanium Thin Films for Biomimetic Micro Actuator","authors":"T. Sakai, Sodai Hoshiai, E. Nakamachi","doi":"10.1299/JSMEA.48.451","DOIUrl":"https://doi.org/10.1299/JSMEA.48.451","url":null,"abstract":"Titanium (Ti) thin films were created on glass and Pb(Zr, Ti)O3 (PZT) substrates using magnetic RF sputtering apparatus. Nano-indentation tests were carried out to study the influence of the Ti thin layer on piezoelectric properties. The piezoelectric properties of the PZT plate and a Ti sputtered one were also measured by laser Doppler vibrometer. Furthermore, some characteristics, such as crystalline structure, depth profiles, and surface roughness of the films were observed by means of an atomic force microscope (AFM). Main conclusions obtained in this study are summarized as follows: (1) From detailed observation and analytical results of AFM, the surface roughness, Ra, tends to increase as Ti film thickness increases. (2) Some of the mechanical properties, such as reduced modulus Er and hardness H obtained from nano-indentation tests, are significantly related to film thickness. (3) The validity of piezoelectric finite element analysis (ANASYS program) for deformation of a piezoelectric material was investigated. As a result, piezoelectric response properties are present in as-received PZT specimens and Ti-sputtered PZT specimens. Experimental and FE analytical results indicate that the piezoelectric coefficient is significantly influenced by Ti layer.","PeriodicalId":170519,"journal":{"name":"Jsme International Journal Series A-solid Mechanics and Material Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124386163","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

Reproduction of FRP Blade Failure for Wind Power Generators by Lightning and its Mechanism 风力发电机玻璃钢叶片遭雷击破坏的再现及其机理

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.465

H. Sakamoto, M. Hanai

{"title":"Reproduction of FRP Blade Failure for Wind Power Generators by Lightning and its Mechanism","authors":"H. Sakamoto, M. Hanai","doi":"10.1299/JSMEA.48.465","DOIUrl":"https://doi.org/10.1299/JSMEA.48.465","url":null,"abstract":"In Japan, lightning damage to FRP blades for wind power generators is increasing, together with the increase in wind power generator installation in recent years. Lightning damage is a big issue in Japan since lightning in Japan seems to be severer than in Europe and the US. In Kochi, Shikoku, Japan, six 600-750kW grade generators have been installed, and some of them have been damaged by lightning several times. In order to solve this issue, the Kochi University of Technology received a research request of lightning protection, sponsored by the Kochi prefecture in 2002. After surveying the literature and questioning related organizations such as NREL (National Renewable Energy Laboratories) and Toray USA, experiments to reproduce lightning damage to FRP specimens were planned. The specimens prepared for this research are 1/2 size models and a 2/4 part of the full size blade. In the previous experiment, flat plate specimens of 450mm width × 2.5m length × 4mm thickness were used, and the experiments produced the damage by lightning. However, the damages were not exactly the same as the ones in the actual field. Therefore, this experiment aims to reproduce the blade failure in the actual field and to clarify the failure mechanism, using the 1/2 size blade model and full size blade specimens. The experiments were conducted mainly in the Toshiba Hamakawasaki High Voltage High Power Testing Laboratory as was made in the previous experiments. This Testing Laboratory is one of the biggest test laboratory for experiments involving high electric voltage and large current. The results showed the reproduction of the failed blades in fields, and clarified the failure mechanism.","PeriodicalId":170519,"journal":{"name":"Jsme International Journal Series A-solid Mechanics and Material Engineering","volume":"67 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120897156","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: 12

Stress and Strain Behaviors of Mg Alloy AZ31 in Plane Strain Compression AZ31镁合金平面应变压缩应力应变行为

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.299

Ikuo Yarita, T. Naoi, T. Hashizume

引用次数: 3

Cleaning Effect of Interlayer Metal on the Joining Surface during Braze Pressure Welding 钎焊压力焊中连接面夹层金属的清洗效果

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.413

Yohei Inagaki, A. Suzumura, T. Ikeshoji, T. Yamazaki

{"title":"Cleaning Effect of Interlayer Metal on the Joining Surface during Braze Pressure Welding","authors":"Yohei Inagaki, A. Suzumura, T. Ikeshoji, T. Yamazaki","doi":"10.1299/JSMEA.48.413","DOIUrl":"https://doi.org/10.1299/JSMEA.48.413","url":null,"abstract":"Braze Pressure Welding (BPW) with high frequency induction heating is a newly developed pressure welding technique using interlayer metals for welding the general steel pipes for pipe arrangement in buildings. BPW enables to make joints by solid-state welding in air with relatively small deformation. In this method, the interlayer metal is expected to play the primary role in making high performance joints. It removes contaminations from the joining surface of the base metal and forms fillets at the gaps around the joint. It had been revealed by some experiments and/or numerical analyses in previous research that the BPW joint had higher tensile strength than the brazed joint, and that the fillet can improve the joint strength. In this study, in order to investigate the cleaning effect of interlayer metal more closely, a low carbon steel plate specimen was brazed mainly by Ni-based brazing filler using a tungsten spacer. The microscopy and EPMA analysis on the joints made by various brazing temperatures and durations confirmed that the oxide films on the joining surfaces were removed and discharged from the joining region by the interlayer metal.","PeriodicalId":170519,"journal":{"name":"Jsme International Journal Series A-solid Mechanics and Material Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122554965","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

Bias in the Weibull Strength Estimation of a SiC Fiber for the Small Gauge Length Case 小规长情况下SiC纤维威布尔强度估计中的偏差

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.194

T. Morimoto, S. Nakagawa, S. Ogihara

引用次数: 14

Solubility and Dissolution Rate of Ni Base Alloy to Molten Ag-Cu-Pd Brazing Filler 镍基合金在熔银铜钯钎料中的溶解度和溶解速率

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.346

T. Ikeshoji, Y. Watanabe, A. Suzumura, T. Yamazaki

引用次数: 3

Improvement of Interfacial Adhesion in Bamboo Polymer Composite Enhanced with Micro-Fibrillated Cellulose 微纤化纤维素增强竹高分子复合材料界面附着力的研究

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.199

K. Okubo, T. Fujii, N. Yamashita

引用次数: 121

3-Dimensional Analysis of Deformation of Disk Wheels and Transverse Force of Wheel Bolts 盘式车轮变形及车轮螺栓横向力的三维分析

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.251

T. Kagiwada, H. Harada

引用次数: 0

Transient Creep Behavior of a Plain Woven SiC Fiber/SiC Matrix Composite 平纹编织SiC纤维/SiC基复合材料的瞬态蠕变行为

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.210

Takayuki Bessho, T. Ogasawara, T. Aoki, T. Ishikawa, Y. Ochi

引用次数: 4

Effect of Microstructure on Fatigue Strength of Bovine Compact Bones 显微组织对牛致密骨疲劳强度的影响

Jsme International Journal Series A-solid Mechanics and Material Engineering Pub Date : 2005-10-15 DOI: 10.1299/JSMEA.48.472

Jong Heon Kim, M. Niinomi, T. Akahori, Junji Takeda, H. Toda

{"title":"Effect of Microstructure on Fatigue Strength of Bovine Compact Bones","authors":"Jong Heon Kim, M. Niinomi, T. Akahori, Junji Takeda, H. Toda","doi":"10.1299/JSMEA.48.472","DOIUrl":"https://doi.org/10.1299/JSMEA.48.472","url":null,"abstract":"Despite its clinical importance in developing artificial bone, limited information is available regarding the microstructure with respect to the fatigue characteristics of bones. In this study, the fatigue characteristics of the bovine humerus and femur were investigated with respect to microstructures. Fatigue tests were conducted on the bovine humerus and femur at a stress ratio of 0.1 and a frequency of 10Hz. The fatigue strength of the plexiform bone is slightly greater than that of the haversian bone. This is because the volume fraction of voids in the haversian bone, which is the site of stress concentration, is higher than that of voids in the plexiform bone. Several microcracks are observed on the fatigue fracture surface of the haversian bone. The microcracks are short and their propagation directions are random. However, the number of the microcracks in the plexiform bone is very small. The microcracks are relatively long and their propagation directions are parallel to the longitudinal direction of the lamellar bone. Therefore, the crack requires relatively more energy to propagate across the lamella in the plexiform bone.","PeriodicalId":170519,"journal":{"name":"Jsme International Journal Series A-solid Mechanics and Material Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121154396","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: 17