Cyclic behavior of Chinese ancient wooden frame with mortise–tenon joints: friction constitutive model and finite element modelling

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 5 Model parameters

Surface contact pair	\({\sigma _{\text{y}}}\) (N/mm²)	\(\tau\) (N/mm²)	\(H\) (N/mm²)	\(\tan \theta\)	\(R_{{\text{a}}}^{\prime }\) (mm)	\(\bar {A}\) (mm²)	\(d\) (mm/s)	\(\pi\)
Ta–Ta	7.0	8.03	24.53	0.042	8.49	807,302	0.0005	3.14
Ta–Tr	4.68	8.03	24.53	0.042	8.49	864	0.0005	3.14

“Surface contact pair” represents the contact surface between the mortise and tenon; “Ta” is the abbreviation of “tangential” and “Tr” is the abbreviation of “transverse”