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Fatigue Behavior of Connection Plate between Main Girder and Cross Beam in Composite Plate Girder(Welding Mechanics, Strength & Design) 复合板梁主梁与横梁连接板的疲劳性能(焊接力学、强度与设计)
Transactions of JWRI Pub Date : 1986-12-01 DOI: 10.2208/JSCEJ.1987.386_247
K. Horikawa, S. Matsumoto, M. Kitazawa
{"title":"Fatigue Behavior of Connection Plate between Main Girder and Cross Beam in Composite Plate Girder(Welding Mechanics, Strength & Design)","authors":"K. Horikawa, S. Matsumoto, M. Kitazawa","doi":"10.2208/JSCEJ.1987.386_247","DOIUrl":"https://doi.org/10.2208/JSCEJ.1987.386_247","url":null,"abstract":"Since urban freeway bridges were opened for traffic more than ten years ago, there have been so many reports on the necessity of reparing cracks and deformations. For an example, the cracks at the connection plate between girder and lateral load-distribution cross beam are reported, and also the cracks at the connection plate between girder and sway bracings for composite plate girders. The investigation for the cracks, the establishment of repair and reinforcement method, and the feedback to the design standard specifications are now urged and many arguments are in progress in many places. In this research, we would like to find out one of the effective solutions by fabricating the test girders with the previous design and with present design, investigating the effects of the rigidity of the cross beam upon the fatigue crack and comparing and discussing the proposed structual details.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87923219","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
Joining of Alumina to Copper Using Amorphous Cu-Ti Filler Metal(Materials, Metallurgy & Weldability) 用非晶Cu-Ti填充金属连接氧化铝与铜(材料、冶金及可焊性)
Transactions of JWRI Pub Date : 1986-12-01 DOI: 10.2207/QJJWS.4.321
M. Naka, K. Asami, I. Okamoto
{"title":"Joining of Alumina to Copper Using Amorphous Cu-Ti Filler Metal(Materials, Metallurgy & Weldability)","authors":"M. Naka, K. Asami, I. Okamoto","doi":"10.2207/QJJWS.4.321","DOIUrl":"https://doi.org/10.2207/QJJWS.4.321","url":null,"abstract":"Joining of alumina (99.62mass% Al2O3) to copper was made using amorphous Cu-Ti (34-57 at%) brazing filler metals at 1173 to 1323 K in 2.7•~10-3 Pa. The amorphous filler metals, 1 cm in width and 45 ,um thick, were produced by liquid quenching. The superior flexibility of amorphous filler provides simplicity to joining process. The fracture shear strength of the joints was measured at room temperature. The strength of the joints brazed at 1323 K for 1.8 ks using CusoTiso filler possesses 138.3 M Pa at room temperature. The strength of the joints at constant brazing time raises with an increase in brazing temperature. The strength increases slightly with an increase in titanium content in the filler. At 1298 K for 1.8 ks, the strength of joints at room temperature changes from 107.8 M Pa with Cu66Ti34 to 120.6 M Pa with Cu43Tis7. The strength of the joints was also investigated at high temperatures up to 973 K. The high temperature shear strength is almost constant up to 773 K, and deceases gradually at higher temperature. Isothermal solidification process takes place during joining, and copper dissoves into Cu-Ti filler metal, and then, copper solid solution containing Ti precipitates from Cu-Ti filler metal. On the other hand, the formation of titanium oxide TiO1 and (Al, Ti)2O3 solid solution oxide is attributable to the strong joining between alumina and Cu-Ti filler.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82343206","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: 3
Effects of Ultrasonic Vibration on Diffusion Welding of Aluminum(Materials, Metallurgy & Weldability) 超声振动对铝扩散焊接的影响(材料、冶金及可焊性)
Transactions of JWRI Pub Date : 1986-12-01 DOI: 10.2464/JILM.36.498
T. Enjo, K. Ikeuchi, H. Fujita
{"title":"Effects of Ultrasonic Vibration on Diffusion Welding of Aluminum(Materials, Metallurgy & Weldability)","authors":"T. Enjo, K. Ikeuchi, H. Fujita","doi":"10.2464/JILM.36.498","DOIUrl":"https://doi.org/10.2464/JILM.36.498","url":null,"abstract":"The ultrasonic vibration has been applied in the diffusion welding of aluminum in an attempt to break up the superficial oxide film of the bond interface. The ultrasonic vibration and subsequent welding have been carried out in a vacuum of 10-2 Pa at 875 K to 893 K under a welding pressure of 1 to 3 MPa. The bond strength increased with the increase in the input power to the transducer and working time of ultrasonic vibration. The increase in pressure to the bond interface during the vibration, however, lowered the bond strength. TEM observation and electric resistance measurement of the bond interface revealed that the application of ultrasonic vibration had the effect of breaking up and dispersing the oxide film, which was closely related to the increase in bond strength. On the fractured surface of joint, dimple patterns, increased with the rise of bond strength. These portions may be regarded as places where the application of ultrasonic vibration promotes breaking up and dispersing the oxide film.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78876490","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: 14
Influence of Nitrogen on the Structure and Low Temperature Impact Properties of 304 Type Austenitic Stainless Steel Weld Metals by SMAW Process(Materials, Metallurgy & Weldability) 氮对304型奥氏体不锈钢SMAW焊接金属组织及低温冲击性能的影响(材料、冶金与可焊性)
Transactions of JWRI Pub Date : 1986-07-01 DOI: 10.2207/QJJWS.4.759
T. Enjo, Y. Kikuchi, H. Moroi
{"title":"Influence of Nitrogen on the Structure and Low Temperature Impact Properties of 304 Type Austenitic Stainless Steel Weld Metals by SMAW Process(Materials, Metallurgy & Weldability)","authors":"T. Enjo, Y. Kikuchi, H. Moroi","doi":"10.2207/QJJWS.4.759","DOIUrl":"https://doi.org/10.2207/QJJWS.4.759","url":null,"abstract":"Experimental covered electrodes(lime-titania type)were made by selective additions of Mn-nitride or Cr-nitride to the electrode covering. 304LN stainless steel base plates(t=12mm)whose edge preparation was machined to single sided V, 60°included angle were clamped in a jig and were welded together bymulti-pass shielded metal arc welding process.Nitrogen content of wcld metals was adjusted by changing the content of Mn-nltride or Cr-nitride in the electrode covering.Effect of nitrogenon the microstructure of weldmetal, δ-ferrite content, mean grain width, hardness and δ-ferrite secondary arm spacing were studied. Impact test for as welded specimen and solution treated specimen have been carried out at temperature range from 77K to room temperature.Influence of nitrogen on the impact value of wcld metals was mainly discusxsed.Results obtained are summarized as follows:(1)δ-ferrite content in the weld metals is influenced largely by the nitrogen content.(2)Impact value of weld metals increases with increasing of the nitrogen content of the weld metals up to about 1700 ppm after then the impact value falls as the nitrogen further increased.(3)The strengthening mechanism of weld metals due to addition of nitrogen is estimated that the effect of austenitic structure stabilized and inetrstitial solution hardening. Micro fissuring and precipitation of cluster(nitride)in excess of nitrogen containing weld metals decrease the impact value of weld metals.(4)Nitrogen content up to about 1700 ppm of weld metal which is introduced by SMAW process gives a good influence on the impact properties at low test temperature under condition of this study.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87785254","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
Measuring Theory of Three-dimensional Residual Stresses Using a Thinly Sliced Plate Perpendicular to Welded Line(Welding Mechanics, Strength & Design) 垂直于焊缝的薄板三维残余应力测量理论(焊接力学、强度与设计)
Transactions of JWRI Pub Date : 1985-12-01 DOI: 10.2207/QJJWS.3.611
Y. Ueda, You Chul Kim, A. Umekuni
{"title":"Measuring Theory of Three-dimensional Residual Stresses Using a Thinly Sliced Plate Perpendicular to Welded Line(Welding Mechanics, Strength & Design)","authors":"Y. Ueda, You Chul Kim, A. Umekuni","doi":"10.2207/QJJWS.3.611","DOIUrl":"https://doi.org/10.2207/QJJWS.3.611","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1985-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88715067","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
Characterization of Plasma-sprayed Zirconia Coatings by X-ray Diffraction and Raman Spectroscopy(Materials, Metallurgy & Weldability) 等离子喷涂氧化锆涂层的x射线衍射和拉曼光谱表征(材料、冶金和可焊性)
Transactions of JWRI Pub Date : 1985-05-10 DOI: 10.1016/0040-6090(85)90219-6
N. Iwamoto, N. Umesaki, S. Endo
{"title":"Characterization of Plasma-sprayed Zirconia Coatings by X-ray Diffraction and Raman Spectroscopy(Materials, Metallurgy & Weldability)","authors":"N. Iwamoto, N. Umesaki, S. Endo","doi":"10.1016/0040-6090(85)90219-6","DOIUrl":"https://doi.org/10.1016/0040-6090(85)90219-6","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1985-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86094306","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: 40
Application of Plastic Node Method to Thermal Elastic-Plastic and Dynamic Problems(Welding Mechanics, Strength & Design) 塑性节点法在热弹塑性和动力问题(焊接力学、强度与设计)中的应用
Transactions of JWRI Pub Date : 1983-06-01 DOI: 10.2534/JJASNAOE1968.1983.200
Y. Ueda, K. Nakacho, M. Fujikubo, Yoshikazu Ishikawa
{"title":"Application of Plastic Node Method to Thermal Elastic-Plastic and Dynamic Problems(Welding Mechanics, Strength & Design)","authors":"Y. Ueda, K. Nakacho, M. Fujikubo, Yoshikazu Ishikawa","doi":"10.2534/JJASNAOE1968.1983.200","DOIUrl":"https://doi.org/10.2534/JJASNAOE1968.1983.200","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1983-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90674780","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
An Approach to Viscosity Calculations of Molten Iron and Its Dilute Binary Alloys 铁水及其稀二元合金粘度计算方法研究
Transactions of JWRI Pub Date : 1974-02-01 DOI: 10.2207/QJJWS1943.42.660
I. Okamoto, T. Iida, H. Kihara
{"title":"An Approach to Viscosity Calculations of Molten Iron and Its Dilute Binary Alloys","authors":"I. Okamoto, T. Iida, H. Kihara","doi":"10.2207/QJJWS1943.42.660","DOIUrl":"https://doi.org/10.2207/QJJWS1943.42.660","url":null,"abstract":"At the present time, accurate theoretical values of viscosities are not available. Therefore, in this paper we have proposed an approach to viscosity calculations of molten iron and its dilute binary alloys.Using the expression for pure liquid totals which have been drived by S. Takeuchi and T. lida, the calculated value of viscosity for molten iron at 1600°C is 4.7cP.From the expression and experimental data, we have presented an attempt to calculate viscosities of dilute binary alloys on simple parameters. That is, viscosities of dilute iron based binary alloys are proportional to the square root of the product of atomic weight and melting point, (MTm)1/2, of alloying elements. Viscosities of molten iron due to one atomic percent of various elements at 1600°C are expressed as follows:ηFe⋅dil=ηFe+K[(MT)1/2B-(MTm)1/2Fe]where, K≈3×10-5 (from experimental data)We have obtained same relation for liquid mercury ant its dilute amalgams as well. Consequently, if we obtain experimentally the value K, the approximate values for viscosities of dilute allosy can be calculated.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1974-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79899096","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
Recent Trend of Researches on Restraint Stresses and Strains for Weld Cracking 焊接裂纹约束应力和应变研究的新动向
Transactions of JWRI Pub Date : 1972-09-01 DOI: 10.2207/QJJWS1943.42.57
K. Satoh, Y. Ueda, H. Kihara
{"title":"Recent Trend of Researches on Restraint Stresses and Strains for Weld Cracking","authors":"K. Satoh, Y. Ueda, H. Kihara","doi":"10.2207/QJJWS1943.42.57","DOIUrl":"https://doi.org/10.2207/QJJWS1943.42.57","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1972-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85819431","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: 21
Effect of Residual Stress and Mechanical Heterogeneity on Brittle Fracture Strength of Welded Joints 残余应力和力学非均匀性对焊接接头脆性断裂强度的影响
Transactions of JWRI Pub Date : 1972-09-01 DOI: 10.2534/JJASNAOE1968.1972.355
K. Satoh, M. Toyoda
{"title":"Effect of Residual Stress and Mechanical Heterogeneity on Brittle Fracture Strength of Welded Joints","authors":"K. Satoh, M. Toyoda","doi":"10.2534/JJASNAOE1968.1972.355","DOIUrl":"https://doi.org/10.2534/JJASNAOE1968.1972.355","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1972-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85936019","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: 3
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