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Cyclic Stress Measurement Using Electrodeposited Nickel Foil 电沉积镍箔的循环应力测量
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2016-01-18 DOI: 10.11395/JJSEM.15.282
Y. Ono, Y. Yagi, T. Harada
{"title":"Cyclic Stress Measurement Using Electrodeposited Nickel Foil","authors":"Y. Ono, Y. Yagi, T. Harada","doi":"10.11395/JJSEM.15.282","DOIUrl":"https://doi.org/10.11395/JJSEM.15.282","url":null,"abstract":"","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132816541","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
Development of Two-Dimensional Scanning Moiré Method for Full-Field Micron/Nano-Scale Deformation Measurement 二维扫描莫尔法在全场微米/纳米尺度变形测量中的应用
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2016-01-18 DOI: 10.11395/JJSEM.15.296
Qinghua Wang, S. Ri, H. Tsuda, T. Tokizaki
{"title":"Development of Two-Dimensional Scanning Moiré Method for Full-Field Micron/Nano-Scale Deformation Measurement","authors":"Qinghua Wang, S. Ri, H. Tsuda, T. Tokizaki","doi":"10.11395/JJSEM.15.296","DOIUrl":"https://doi.org/10.11395/JJSEM.15.296","url":null,"abstract":"A two-dimensional (2D) scanning moiré method was proposed to measure the micron/nano-scale deformation distributions in two dimensions using a single moiré pattern under a laser scanning microscope. The 2D scanning moiré pattern in a large view field (width is 500~2000 times the grating pitch) comes from the interference between a cross specimen grating and the 2D laser scanning dots which serve as the reference grating. The 2D scanning moiré fringes can be separated to two groups of parallel one-dimensional moiré fringes in two directions using complex Fourier transform. The full-field micron/nano-scale deformation distributions in the x and the y directions are measureable from the corresponding parallel moiré fringes, respectively. Consequently, the 2D displacement and strain distributions can be determined using a single 2D moiré pattern, instead of two moiré patterns in two directions. The proposed method possesses the advantages of time saving, large view field, non-destruction, and high accuracy for two-dimensional deformation measurement of various materials evaluation.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114360526","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
Temperature Dependence of Elastic Moduli of Inorganic Adhesives with 3 Types of Binders 无机胶粘剂与3种粘结剂弹性模量的温度依赖性
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2016-01-18 DOI: 10.11395/JJSEM.15.289
S. Wu, H. Nakane, K. Mori
{"title":"Temperature Dependence of Elastic Moduli of Inorganic Adhesives with 3 Types of Binders","authors":"S. Wu, H. Nakane, K. Mori","doi":"10.11395/JJSEM.15.289","DOIUrl":"https://doi.org/10.11395/JJSEM.15.289","url":null,"abstract":"Temperature Dependence of Elastic Moduli of Inorganic Adhesives with 3 Types of Binders Shan WU, Hisashi NAKANE and Kiyomi MORI In this study, the effect of binder type on the elastic moduli of inorganic adhesives is investigated at elevated temperatures using an impact exciting method for measuring natural frequencies of adhesive bulk specimens with rectangular cross section. The specimens are treated as the Bernoulli-Euler beam and the elastic moduli of the adhesive bulk specimens are obtained by the impact exciting method at temperatures from room temperature to 900 degrees Celsius. To compare with the results for the natural frequencies, the elastic moduli are also measured by the static bend tests at room temperature. The experimental results obtained by the impact exciting method show good agreement with those by the static bending method. An adhesive composed of an aluminum di-hydrogen phosphate binder shows the highest value of longitudinal elastic modulus in the inorganic adhesives of three different binders. The elastic modulus of an adhesive composed of water glass binder remains constant up to 600 degrees Celsius.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115061448","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
Comparative Study of Digital Image Correlation Method and Sampling Moiré Method for In-plane Displacement Distribution Measurement 平面内位移分布测量中数字图像相关法与采样法的比较研究
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2016-01-18 DOI: 10.11395/JJSEM.15.303
S. Ri, Qinghua Wang, S. Arikawa, S. Yoneyama
{"title":"Comparative Study of Digital Image Correlation Method and Sampling Moiré Method for In-plane Displacement Distribution Measurement","authors":"S. Ri, Qinghua Wang, S. Arikawa, S. Yoneyama","doi":"10.11395/JJSEM.15.303","DOIUrl":"https://doi.org/10.11395/JJSEM.15.303","url":null,"abstract":"Comparative Study of Digital Image Correlation Method and Sampling Moiré Method for In-plane Displacement Distribution Measurement Shien RI, Qinghua WANG, Shuichi ARIKAWA, Satoru YONEYAMA Displacement distribution gives useful information to understand the deformation behavior in materials science. Full-field optical methods, including the digital image correlation method and the sampling moiré method, are useful and effective to measure the displacement and strain distribution of materials by using a random pattern or a regular repeated pattern. In this study, we performed a comparative study to evaluate the measurement accuracy for digital image correlation and sampling moiré method using a same camera and an aluminum specimen subjected to same lighting condition. We discuss the advantage and disadvantage of both methods from the viewpoint of the accuracy under different signal-to-noise ratio (SNR) measurement conditions, and the analysis speed in case of single-core and multi-core CPU computing. Experimental results indicated that digital image correlation method is useful to measure the deformation under a high SNR condition in an easy way, and the sampling moiré method is robust to the measurement condition. Compared with the analysis speed, sampling moiré method is much faster than digital image correlation method. Furthermore, both methods are useful as a full-field measurement tool in experimental mechanics if a random pattern or arbitrary repeated pattern can be observed on the surface of materials.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132933079","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
Proposal for Precision Prediction Method for Depth Measuring Microscope Using Grating Projection Method 光栅投影法深度测量显微镜精度预测方法的提出
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.210
K. Kaneko, M. Fujigaki, Y. Murata
{"title":"Proposal for Precision Prediction Method for Depth Measuring Microscope Using Grating Projection Method","authors":"K. Kaneko, M. Fujigaki, Y. Murata","doi":"10.11395/JJSEM.15.210","DOIUrl":"https://doi.org/10.11395/JJSEM.15.210","url":null,"abstract":"The purpose of this study is to propose predictive method of the measuring precision of the depth measuring microscope using a technique that combines a whole-space tabulation method (WSTM) and light-source stepping method. The WSTM excludes almost all of systematic errors such as the influence of a lens distortion and deformation of the brightness distribution of the projected grating from the measured result. Therefore, it becomes possible to predict the precision of a measurement device by only considering the random error caused by camera noise and caused by reflectance characteristics of the surface of an object. In this study, a precision prediction method for depth measuring microscope using grating projection method is proposed. The effectiveness of the predictive method is verified by comparing the predicted precision and the measuring precision. The theory and experimental results are shown.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"90 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129819026","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
Use of transmission mode of induction heating assisted eddy current testing at near resonance frequency for detection of delamination in CFRP 利用感应加热辅助近共振频率涡流检测的传输方式检测CFRP的分层
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.200
K. Mizukami, Y. Mizutani, Yoshiaki Nakamura, A. Todoroki, Yoshiro Suzuki
{"title":"Use of transmission mode of induction heating assisted eddy current testing at near resonance frequency for detection of delamination in CFRP","authors":"K. Mizukami, Y. Mizutani, Yoshiaki Nakamura, A. Todoroki, Yoshiro Suzuki","doi":"10.11395/JJSEM.15.200","DOIUrl":"https://doi.org/10.11395/JJSEM.15.200","url":null,"abstract":"This paper presents an eddy current-based approach for detection of delamination in carbon fiber-reinforced plastics (CFRPs). It has been difficult for conventional eddy current testing to detect delamination because delamination is parallel to eddy current paths. The authors proposed induction heating assisted eddy current testing (IHAET) for delamination detection. In IHAET, surface of the material under test is heated by induction heating coil to cause temperature difference between intact zone and delamination zone. Delamination can be detected by electrical conductivity measurement of eddy current testing utilizing the temperature dependence of conductivity. In this paper, heating and temperature measurement of materials was carried out in transmission mode to reduce the lift-off effect. In addition, surface temperature of CFRP was measured by eddy current testing probe at near resonance frequency to improve sensitivity of thermo-sensing. Experimental studies prove that sensitivity of thermo-sensing can be improved by using a resonant probe compared to our previous work. We found that measurement of reactance of thermo-sensing coil offers higher sensitivity due to the resonance frequency shift caused by variation of material’s conductivity. Furthermore, 10 mm wide delamination 2 mm away from the surface of 4 mm thick CFRP could be detected by the proposed method.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133592493","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
Slot-Nozzle Tip Angle’s Effect for Wiping Ability 狭口喷嘴尖角对擦拭能力的影响
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.217
Hideyuki Takahashi, Gentaro Takeda, Masaru Miyake, N. Nakata
{"title":"Slot-Nozzle Tip Angle’s Effect for Wiping Ability","authors":"Hideyuki Takahashi, Gentaro Takeda, Masaru Miyake, N. Nakata","doi":"10.11395/JJSEM.15.217","DOIUrl":"https://doi.org/10.11395/JJSEM.15.217","url":null,"abstract":"From the viewpoint of surface quality, the jet wiping method, that is a non-contact type, is used to control the coating thickness in a continuous galvanizing line. In this paper, in order to study influences of nozzle tip angles on the wiping ability, we conducted wiping tests using a wiping simulator and CFD analysis to examine the jet properties. Furthermore, we observed the shape of the liquid film in the vicinity of jet impingement. The wiping tests revealed that the nozzle tip angle had a large influence on film thickness. A thickness increase of approximately 20% was observed at a tip angle of 90° compared to 50°. But there were no changes in impingement pressures and shear stresses in both measurements and CFD analysis. On the other hand, the film shapes changed, becoming thicker when the tip angle was increased. Therefore, the change of liquid film thickness is inferred as the main reason for wiping performance changes by nozzle shape.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121721441","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
Response Behavior of CFRP/Steel Hybrid Plates under Low-Velocity Impact Bending Load 低速冲击弯曲载荷下CFRP/钢复合材料板的响应特性
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.194
Hyoung-soo Kim, G. Ben, Y. Aoki
{"title":"Response Behavior of CFRP/Steel Hybrid Plates under Low-Velocity Impact Bending Load","authors":"Hyoung-soo Kim, G. Ben, Y. Aoki","doi":"10.11395/JJSEM.15.194","DOIUrl":"https://doi.org/10.11395/JJSEM.15.194","url":null,"abstract":"Response Behavior of CFRP/Steel Hybrid Plates under Low-Velocity Impact Bending Load Hyoung-Soo KIM, Goichi BEN and Yoshio AOKI Carbon fiber reinforced plastic (CFRP) laminates are used in various industrial fields because they have excellent properties such as a specific strength and a specific stiffness. The use of CFRP in the manufacture of automobiles can lead to a significant reduction in automobile weight, thereby improving the vehicle mileage as well as reducing CO2 emissions. On the other hand, the issue of passenger safety in case of collisions should also be clarified when employing CFRP in the fabrication of automotive structures. The objective of this study is to investigate the response behavior and energy absorption characteristics of CFRP/Steel hybrid plates which consisted of a steel and three types of CFRP laminates under low-velocity impact bending load. We performed drop weight impact tests under the boundary condition of three point bending; the tests involved dropping an impactor from a height of 1.5 m so that the impactor speed just before impact was approximately 20 km/h. With regard to the impact response behavior and absorbed impact energy, the UD-0 specimen showed better performance than the other specimens.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132825032","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
Development of a Measurement System to Conduct Tapping AE Method 攻丝声发射法测量系统的研制
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.175
Takeshi Ashizawa, Y. Mizutani, A. Todoroki, Yoshiro Suzuki
{"title":"Development of a Measurement System to Conduct Tapping AE Method","authors":"Takeshi Ashizawa, Y. Mizutani, A. Todoroki, Yoshiro Suzuki","doi":"10.11395/JJSEM.15.175","DOIUrl":"https://doi.org/10.11395/JJSEM.15.175","url":null,"abstract":"","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122008345","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
Measurement of Residual Stress in PMMA Plate Specimen by Means of Ray Tracing Method 射线追踪法测量PMMA板试样残余应力
Journal of the Japanese Society for Experimental Mechanics Pub Date : 2015-09-29 DOI: 10.11395/JJSEM.15.205
S. Suzuki, M. Nishikawa, Keita Tamura
{"title":"Measurement of Residual Stress in PMMA Plate Specimen by Means of Ray Tracing Method","authors":"S. Suzuki, M. Nishikawa, Keita Tamura","doi":"10.11395/JJSEM.15.205","DOIUrl":"https://doi.org/10.11395/JJSEM.15.205","url":null,"abstract":"A ray tracing method is applied to measure residual stress in a transparent PMMA specimen. A laser beam enters into the PMMA specimen and propagates in it. The laser beam changes its propagation direction slightly, caused by the change of refractive index of PMMA due to the residual stress. Measuring the laser beam trajectory gives the distribution of residual stress in the specimen by means of ray tracing equation. The measurement results say that the residual stress near specimen surface is compressive stress and the maximum value is about 11MPa. This value is much smaller than the fracture strength of 79MPa of PMMA, however, may not be negligible in accurate experiments to verify a theory of fracture mechanics.","PeriodicalId":282024,"journal":{"name":"Journal of the Japanese Society for Experimental Mechanics","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132315626","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
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