{"title":"Effect of plate deformation around the nugget during tensile test on tensile shear strength of resistance spot welded lap joints","authors":"Takanori Kitamura, Tetsuya Akiyama, Mitsuhiro Imamura, Tomoya Kawabata, Atsuro Uemura, Chinatsu Mihara, Koki Iwatani","doi":"10.1080/09507116.2023.2222958","DOIUrl":null,"url":null,"abstract":"AbstractAbstractResistance spot welding is used in automobile body assembly. Tensile shear test is one of the strength evaluation methods for welded joints. Generally, in tensile shear tests of lap joints, rotational deformation occurs in the joint due to offset of the load axis. In this paper, the effect of rotational deformation of resistance spot welded lap joints on tensile shear strength was investigated. A high-strength steel plate HT590 was used. First, tensile shear tests were conducted using only resistance spot welding (Normal) and a specimen in which the welded joint part was sandwiched between two steel blocks to suppress rotational deformation. For the specimens sandwiched between steel blocks, a specimen was prepared with a constrained point parallel (P) to the tensile direction and a specimen with a constrained point vertical (V) to the tensile direction. And the length of the steel blocks was varied in five ways for the tensile shear test. The results showed that the tensile shear strength increased as the length of the steel block increased. However, the suppression of rotational deformation didn’t have a significant effect on tensile shear strength. In tensile shear tests of lap joints, opening of the lap plates occurs in addition to rotational deformation. Therefore, tensile shear tests were conducted using a specimen with two steel blocks sandwiched at the edge of the lap to suppress the opening of the plates. The experiment was reproduced and investigated by FEM analysis. The results showed that the tensile shear strength increased in the deformation-suppressed specimens compared to Normal specimens. In other words, it is clear that the suppression of plate opening has an effect on the increase in tensile shear strength. The above results indicate that suppression of plate opening is effective in increasing tensile shear strength.Keywords: Resistance spot weldinghigh tensile strength steeltensile shear strengthrotational deformationopening of the platesFEM analysistensile shear test","PeriodicalId":23605,"journal":{"name":"Welding International","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Welding International","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/09507116.2023.2222958","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Materials Science","Score":null,"Total":0}
引用次数: 0
Abstract
AbstractAbstractResistance spot welding is used in automobile body assembly. Tensile shear test is one of the strength evaluation methods for welded joints. Generally, in tensile shear tests of lap joints, rotational deformation occurs in the joint due to offset of the load axis. In this paper, the effect of rotational deformation of resistance spot welded lap joints on tensile shear strength was investigated. A high-strength steel plate HT590 was used. First, tensile shear tests were conducted using only resistance spot welding (Normal) and a specimen in which the welded joint part was sandwiched between two steel blocks to suppress rotational deformation. For the specimens sandwiched between steel blocks, a specimen was prepared with a constrained point parallel (P) to the tensile direction and a specimen with a constrained point vertical (V) to the tensile direction. And the length of the steel blocks was varied in five ways for the tensile shear test. The results showed that the tensile shear strength increased as the length of the steel block increased. However, the suppression of rotational deformation didn’t have a significant effect on tensile shear strength. In tensile shear tests of lap joints, opening of the lap plates occurs in addition to rotational deformation. Therefore, tensile shear tests were conducted using a specimen with two steel blocks sandwiched at the edge of the lap to suppress the opening of the plates. The experiment was reproduced and investigated by FEM analysis. The results showed that the tensile shear strength increased in the deformation-suppressed specimens compared to Normal specimens. In other words, it is clear that the suppression of plate opening has an effect on the increase in tensile shear strength. The above results indicate that suppression of plate opening is effective in increasing tensile shear strength.Keywords: Resistance spot weldinghigh tensile strength steeltensile shear strengthrotational deformationopening of the platesFEM analysistensile shear test
期刊介绍:
Welding International provides comprehensive English translations of complete articles, selected from major international welding journals, including: Journal of Japan Welding Society - Japan Journal of Light Metal Welding and Construction - Japan Przeglad Spawalnictwa - Poland Quarterly Journal of Japan Welding Society - Japan Revista de Metalurgia - Spain Rivista Italiana della Saldatura - Italy Soldagem & Inspeção - Brazil Svarochnoe Proizvodstvo - Russia Welding International is a well-established and widely respected journal and the translators are carefully chosen with each issue containing a balanced selection of between 15 and 20 articles. The articles cover research techniques, equipment and process developments, applications and material and are not available elsewhere in English. This journal provides a valuable and unique service for those needing to keep up-to-date on the latest developments in welding technology in non-English speaking countries.