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Abstract


INVESTIGATION OF MECHANICAL PROPERTIES OF PIPES WITH BUTT CURVED LAP JOINTS SUBJECTED TO TORSION

In this study, the mechanical properties of steel pipe joints bonded with an acrylic adhesive under torsion were investigated by considering different overlap lengths and curvilinear radii. For this purpose, St-37 galvanized steel pipes with ØD = 21.3 mm outer and Ød = 15.9 mm inner diameters were modeled in three dimensions by creating 8, 10, 12 mm overlapping lengths in male and female form and 30, 40 and 50 mm curvilinear radii on the forehead regions. Numerical analyzes of the created models were performed in the ANSYS Workbench program, and samples with an overlap length of 10 mm were prepared on the CNC (Computer Numerical Control) bench to verify the numerical analysis. The prepared male and female specimens were joined using an acrylic-based DP810 structural adhesive resistant to humid environments, curable at room temperature, and validation experiments were carried out. After the study, obtained numerical and experimental data showed that pipe lap joints subjected to torsional moment with the same lap length but different curvilinear radius have been observed to vary significantly in the amount of load they carry. In addition, as the overlap length increased, the amount of load they carried increased. Also, in this study was compared by performing stress analyzes according to the overlap length and radii of curvature.



Keywords
Pipes, Torsion, Structural adhesives, Curvilinear surface lap joints, Finite elements



Kaynakça ANSYS Workbench V.15. Swanson Analysis Systems, Inc., (2015). Çitil, Şerif, & Bozkurt, İsmail. "Eğrisel yüzeyli boru bağlantılarının mekanik özelliklerinin incelenmesi." 4.7 (2017): 63-72. Çitil, Ş., İ. Bozkurt, and M. Demir Aydın. "Experimental and 3D non-linear stress analysis of adhesively bonded pipes with curved-surface lap joints." The Journal of Adhesion 95.5-7 (2019): 515-528. Davies, Peter, et al. "Influence of adhesive bond line thickness on joint strength." International journal of adhesion and adhesives 29.7 (2009): 724-736. Lavalette, Nicolas P., et al. "Influence of geometrical parameters on the strength of Hybrid CFRP-aluminium tubular adhesive joints." Composite Structures 240 (2020): 112077. Şahan, Mehmet Fatih. "Hasar gören galvanizli boruların epoksi esaslı yapıştırıcı ile tamiratında boru yama geometrisi ile boru patlama basıncı arasındaki ilişkinin incelenmesi." Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi 7.2 (2018): 899-908. Saraç, İsmail. "Yapıştırıcı ile birleştirilmiş mil-göbek bağlantılarında lineer-elastik gerilme analizi ve göbek kenar geometrisinin dayanıma etkisinin araştırılması." El-Cezeri Journal of Science and Engineering 7.3 (2020): 994-1007. Solmaz, Murat Yavuz, & Taş, Betül. "Yapıştırıcıyla Birleştirilmiş Konik Geçme Bağlantıların Burulma Momenti Etkisindeki Davranışları." Fırat Üniversitesi Mühendislik Bilimleri Dergisi 30.2 (2018): 73-86. Walame, M.V. & Ahuja, B.B. "Effect of bond length, bond clearance and torsional stiffness of adherends on torque transmission capability of adhesively bonded cylindrical joint." International Journal of Engineering Research & Technology 2.6 (2013): 1930-1935. Zou, G. P., and F. Taheri. "Stress analysis of adhesively bonded sandwich pipe joints subjected to torsional loading." International Journal of Solids and Structures 43.20 (2006): 5953-5968.

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