Stiffness Calculation Model of Thread Connection Considering Friction Factors

Table 1

Stiffness of threaded connections with different engaged lengths [1] (kN/mm).

No.	Size code of threads	Material	Exp.	Theory		FEA
				This study	Yamamoto method
1	M36×4×32	Brass	3627.6	4201.9	4282.1	3630.9
2	M36×4×20		2664.3	3152.9	3946.1	2761.6
3	M36×4×12		1801.3	2074.2	3129.3	1816.8