Simulation of the Stress-Strain State of Bolted Connections in ANSYS

Modeling of the stress-strain state of bolted connections using the ANSYS Workbench software is considered in this article. A bolted connection of two flanges with a gasket loaded with a tear force is chosen for the calculation. The external load is applied both to the outer and inner surfaces of the flanges. The computer program made it possible to take into account the effect of the gasket (the elastic modulus of which is different from that of the flange) on the external load factor and calculate it. Using the foundation bolts of planetary reducers loaded with the tilting moment as an example, the stress-strain state was calculated. The ANSYS software allowed taking into account the true forces acting on the bolts: the tear force and shear due to the height of the shaft axes. As a result, a complete evaluation of the stress-strain state of each bolt was obtained, including the stress concentrators. The stress state of the bolts is not uniform due to the presence of bending moments. Computer simulation with embedded finite element method provides significantly more information about the stress-strain state of bolted connections loaded by a variety of schemes, without making any assumptions.

References

[1] Matharu N.S., Mottram J.T. Plain and threaded bearing strength for the design of bolted connections with pultruded FRP material. Engineering Structures, 2017, vol. 152, pp. 878–887.

[2] Correia J.A.F.D.O., Pedrosa B.A.S., Raposo P.C., De Jesus A.M.P., dos Santos Gervásio H.M., Lesiuk G.S., da Silva Rebelo C.A., Calçada R.A.B., da Silva L.A.P.S. Fatigue strength evaluation of resin-injected bolts connections using statistical analysis. Engineering, 2017, vol. 3, is. 6, pp. 795–805.

[3] Paolo Z., Curtarello A., Maiorana E., Pellegrino C. Numerical analyses of corroded bolted connections. Procedia Structural Integrity, 2017, vol. 5, pp. 592–599.

[4] Nazarko P., Ziemianski L. Force identification in bolts of flange connections for structural health monitoring and failure prevention. Procedia Structural Integrity, 2017, vol. 5, pp. 460–467.

[5] Woo S.-P., Kim S.-H., Yoon S.-J., Choi W. Effect of Bolt-Hole Clearance on Bolted Connection Behavior for Pultruded Fiber-Reinforced Polymer Structural Plastic Members. International Journal of Polymer Science, 2017, vol. 2017, article no. 8745405.

[6] Vasil’ev N.S., Zaiarnyi S.L. Model’ friktsionnogo boltovogo soedineniia, s uchetom podatlivosti styka [Model friction bolt connection, taking into account the malleability of the joint]. Innovatsionnaia nauka [Innovative science]. 2016, no. 6, pp. 42–44.

[7] Ivanov A.S., Murkin S.V. Raschet i proektirovanie rez’bovykh soedinenii privodov [Calculation and design of screw connections of the actuators]. Vestnik mashinostroeniia [Russian Engineering Research]. 2016, no. 5, pp. 3–10.

[8] Semenov K.O., Pikus G.A., Bayburin A.H. Nachal’nye deformatsii boltovyh soedineniy metallokonstruktsiy [Initial deformations of bolted joints in metal structures]. Vestnik Yuzhno-Ural’skogo gosudarstvennogo universiteta. Seriya: Stroitel’stvo i arhitektura [Bulletin of SUSU. Series Construction Engineering and Architecture]. 2016, no. 2, pp. 18–21.

[9] Ivanov A.S., Murkin S.V. Raschet i proektirovanie rez’bovykh soedinenii privodov [Calculation and design of screw connections of the actuators]. Moscow, Innovatsionnoe mashinostroenie, 2015. 108 p.

[10] Zhernakov V.S., Mardimasova T.N., Arslanov M.R., Akbashev V.R. Issledovanie vliianiia rez’bovykh vstavok na napriazhenno-deformirovannoe sostoianie rez’bovogo soedineniia [Investigation of the influence of threaded inserts on the stressed-deformed state of the threaded connection]. Vestnik UGATU [Vestnik of Ufa State Aviation Technical University]. 2017, vol. 21, no. 4, pp. 18–24.

[11] Molnár L., Váradi K., Holubán J., Tamási A. Stress Analysis of Bolted Joints Part II. Contact and Slip Analysis of a Four Bolt Joint. Modern Mechanical Engineering, 2014, no. 4, pp. 46–55.

[12] Molnár L., Váradi K., Liktor B. Stress Analysis of Bolted Joints Part I. Numerical Dimensioning Method. Modern Mechanical Engineering, 2014, no. 4, pp. 46–55.

[13] Evdokimov N.N., Stepchenko A.S., Trubaev A.I. Modelirovanie napriazhenno-deformirovannogo sostoianiia boltovogo soedineniia rabochego kolesa gidroturbiny na osnove 3D modeli [Modeling of the stress-strain state of the bolt connection of the impeller of the hydraulic turbine based on the 3D model]. Vestnik NTU KhPI [Proceeding of NTU KhPI]. 2009, no. 42, pp. 45–53.

[14] Zhilin R.A., Nilov V.A., Rukin Iu.B., Demidov A.V., Konovaliyk S.N., Trukhachev А.I. Analiz rabotosposobnosti zatianutogo soedineniia detalei naklonno-povorotnogo mekhanizma [Problems and possible ways of their decision at discrete modelling of complex systems]. Vestnik VGTU [Proceedings of Voronezh State Technical University]. 2014, vol. 10, no. 5–1, pp. 41–45.

[15] Bocko J., Čarák P., Čajka M. Analysis of Stress and Deformation States in Bolted Joints with Prestress. American Journal of Mechanical Engineering, 2016, no. 4(7), pp. 241–246, doi: 10.12691/ajme-4-7-2.

[16] Liu J.H., Ouyang H.J., Ma L.J., Zhang C.Q., Zhu M.H. Numerical and theoretical studies of bolted joints under harmonic shear displacement. Latin American Journal of Solids and Structures, 2015, no. 12(1), pp. 115–132.