PSI - Issue 44

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Ivan Marenda et al. / Procedia Structural Integrity 44 (2023) 2152–2157 Ivan Marenda et al./ Structural Integrity Procedia 00 (2022) 000–000

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On the one hand, the friction coefficient of the HI-M material is well defined by the formula (8). This law provides a macroscopic description of the behaviour of the joint that allows its design. Fig. 5 illustrates the variation of the friction coefficient of HI-M with speed, pressure, and temperature. a) b) c)

Fig. 5. Variation of the friction coefficient due to (a) velocity, (b) pressure and (3) cycles

On the other hand, the studies conducted by Cooper, Miki and Yovanovich allow us to study in detail the contact between two surfaces in both mechanical and thermal terms. For this reason, Hirun International is investigating the contact at the microscopic level to define the axial and tangential behaviour of the joint. References Constantinou, M.C., Mokha, A., Reinhorn, A.M. (1990) “Teflon bearings in base isolation. II: modelling”, Journal of Structural Engineering, Vol. 116(2), pp. 455–474, DOI:10.1061/(ASCE)0733-9445(1990)116:2(455) Gandelli E., Penati M., Quaglini V., Lomiento G., Miglio E., Benzoni G.M. “A novel OpenSees element for single curved surface sliding isolators.” Cooper M. G., Mikic B. B., Yovanovich M. M., “Thermal contact conductance”, Int. J. Of Heat and Mass Transfer, Vol. 12, pp. 279-300 (1969) Mikic B.B. “Analytical studies of contact of nominally flat surfaces; effect of previous loading.” Journal of Lubrication Technology, vol. 93, pp. 451-459 (1971) Mikic B.B., “Thermal Contact Conductance; theoretical considerations.” Int. J. Of Heat and Mass Transfer, Vol. 12, pp. 205-214 (1974) J.A.C. Martins and T.J. Oden, “Existence and uniqueness results for dynamic contact problems with nonlinear normal and friction interface laws.” Nonlin. Anal. 11(3) (1987) 407-428. Gandelli E., Penati M., Quaglini V., Lomiento G., Miglio E., Benzoni G.M. “A novel OpenSees element for single curved surface sliding isolators.” Marenda I., Marioni G. Dalpedri R., Banfi M. “Dynamic properties of the isolators used in the Green Museumbrary.” Marenda I. “The electromechanical contact: extension in the computational field.” Thesis – University of Padova – Italy 2001-2002 Boso D.P., Schrefler B.A.,Zavarise G. “A contact formulation for electrical and mechanical contact resistance.” CMIS – 3 rd Contact Mechanics International Symposium Peniche (Lisbon), Portugal, June 17-21, 2001 Boso D.P., Schrefler B., Zavarise G., “A couplet electric- mechanical approach for contact problems.” Accepted for WCCM 5 th World Congress On Computational Mechanics, Vienna, Austria, 2002. Thomas T.R., Woo K.L., “Contact of rough surfaces: a review of experimental work” Proc. R. Society London, 259-A, 300-379, 1969. Bush A.W., Gibson R. D., Thomas T.R., “The elastic contact of a rough surface.” Wear, Vol. 35, pp. 87-111 (1975)