弯矩作用下带NiTi垫片的法兰连接有限元分析
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摘要
用ABAQUS分析了外弯矩作用下带有NiTi形状记忆合金垫片的不同规格法兰连接,并与同等加载条件下使用金属石墨缠绕垫片、纯铝平垫片进行了对比。结果表明,采用NiTi合金垫片不改变法兰和螺栓的应力分布,但应力水平会有所提高;法兰偏转角度要比采用纯铝平垫片或金属石墨缠绕垫片的略大一些,但远低于ASME规范中要求的0.3°;NiTi合金垫片密封面上的压紧力分布要比同密封宽度纯铝平垫片或金属石墨缠绕垫片均匀,在密封面宽度相同时,NiTi合金垫片最大密封压紧力要比纯铝平垫片的低,但比金属石墨缠绕垫片的要高。
Flange joints with NiTi shape memory alloy gasket were studied using finite element analysis( ABAQUS),and the conclusions were compared with those flange joints with spiral-wound gasket or aluminum gasket.The results show that stresses distribution of flanges and bolts are affected little by NiTi gasket,while stress level is higher than those joints with other two kinds of gaskets.The angle of flange rotation with NiTi gasket is much lower than the requirement of 0.3° in ASME code and slightly larger than other two.Gasket contact stress uniformity of NiTi is better than other two.Maximum contact stress of NiTi gasket is smaller than aluminum gasket but larger than spiral-wound gasket.
Flange joints with NiTi shape memory alloy gasket were studied using finite element analysis( ABAQUS),and the conclusions were compared with those flange joints with spiral-wound gasket or aluminum gasket.The results show that stresses distribution of flanges and bolts are affected little by NiTi gasket,while stress level is higher than those joints with other two kinds of gaskets.The angle of flange rotation with NiTi gasket is much lower than the requirement of 0.3° in ASME code and slightly larger than other two.Gasket contact stress uniformity of NiTi is better than other two.Maximum contact stress of NiTi gasket is smaller than aluminum gasket but larger than spiral-wound gasket.
引文
[1]Efremov Anatoly.Bolted flanged connection for critical engineering applications[C]//Proceedings of 2006 ASME Pressure Vessels and Piping Division Conference,Canada,2006.
[2]Efremov Anatoly.Negative creep gasket with core of shape memory alloy[P].US,Appl.No.:11/405 722,20071018.
[3]Takagi Yoshio,Tatsuoka Teruhisa,Sawa Toshiyuki.The effect of the thermal expansion coefficient on the sealing performance of pipe flange connections with Ni-Ti shape memory alloy gaskets[C]//Proceedings of 2006 ASME Pressure Vessels and Piping Division Conference,Canada,2006.
[4]Tatsuoka Teruhisa,Takagi Yoshio,Sawa Toshiyuki.Sealing performance of pipe flange connections with shape memory alloy gaskets under internal pressure[C]//ASME/JSME Pressure Vessels and Piping Conference,US,2004.
[5]Liu Yong,Xie Ze-liang,Humbeeck J Von,et al.Asymmetry of stress-strain curves under tension and compression for Ni Ti shape memory alloys[J].Acta Mater.,1998,46(12):4325-4338.
[6]Adharapurapu Raghavendra R,Jiang Feng-chun,Vecchio Kenneth S.Aging effects on hardness and dynamic compressive behavior of Ti-55Ni(at.%)alloy[J].Materials Science and Engineering A,2010,527:1665-1676.
[7]Bouzid Abdel Hakim,Derenne Michel,Ei-Rich Marwan,et al.Effect of flange rotation and gasket width on the leakage behavior of bolted flanged joints[J].Welding Research council Bulletin,2004,11:496.
[8]Bouzid Abdel Hakim,Diany Mohammed,Derenne Michel.Determination of gasket effective width based on leakage[C]//ASME/JSME Pressure Vessels and Piping Conference,San Diego,US,2004.
[2]Efremov Anatoly.Negative creep gasket with core of shape memory alloy[P].US,Appl.No.:11/405 722,20071018.
[3]Takagi Yoshio,Tatsuoka Teruhisa,Sawa Toshiyuki.The effect of the thermal expansion coefficient on the sealing performance of pipe flange connections with Ni-Ti shape memory alloy gaskets[C]//Proceedings of 2006 ASME Pressure Vessels and Piping Division Conference,Canada,2006.
[4]Tatsuoka Teruhisa,Takagi Yoshio,Sawa Toshiyuki.Sealing performance of pipe flange connections with shape memory alloy gaskets under internal pressure[C]//ASME/JSME Pressure Vessels and Piping Conference,US,2004.
[5]Liu Yong,Xie Ze-liang,Humbeeck J Von,et al.Asymmetry of stress-strain curves under tension and compression for Ni Ti shape memory alloys[J].Acta Mater.,1998,46(12):4325-4338.
[6]Adharapurapu Raghavendra R,Jiang Feng-chun,Vecchio Kenneth S.Aging effects on hardness and dynamic compressive behavior of Ti-55Ni(at.%)alloy[J].Materials Science and Engineering A,2010,527:1665-1676.
[7]Bouzid Abdel Hakim,Derenne Michel,Ei-Rich Marwan,et al.Effect of flange rotation and gasket width on the leakage behavior of bolted flanged joints[J].Welding Research council Bulletin,2004,11:496.
[8]Bouzid Abdel Hakim,Diany Mohammed,Derenne Michel.Determination of gasket effective width based on leakage[C]//ASME/JSME Pressure Vessels and Piping Conference,San Diego,US,2004.