A Model accounting for Stiffness Weakening of Curvic Couplings under Various Loading Conditions

Table 4

Weakening ratio of the analytical solutions compared to continuous structures.

Serial number of samples		1	2	3	4	5	6	7	8	9	10	11	12
Shearing	Curvic couplings	3620	4000	4160	5310	5520	4800	6890	5990	6626	7183	7943	8265
	Continuous segments	12629			16833			21046			16833
	Stiffness-weakening ratio (%)	71.34	68.33	67.06	68.46	67.21	71.49	67.26	71.54	68.52	57.33	52.82	50.90
Compression	Curvic couplings	2070	5110	10100	6810	13500	2750	16900	3440	8515	4132	10220	20230
	Continuous segments	32835			43766			54720			43766
	Stiffness-weakening ratio (%)	93.70	84.44	69.24	84.44	69.15	93.72	69.12	93.71	84.44	90.56	76.65	53.78
Bending	Curvic couplings	337	838	1660	1120	2230	454	2790	569	1410	685	1695	3358
	Continuous segments	5551			7399			9251			43766
	Stiffness-weakening ratio (%)	93.93	84.90	70.10	84.86	69.86	93.86	69.84	93.85	84.76	93.83	84.73	69.74
Torsion	Curvic couplings	2390	2640	2750	3520	3660	3180	4580	3980	4401	4774	5280	5495
	Continuous segments	4270			5692			7116			8538
	Stiffness-weakening ratio (%)	44.03	38.18	35.60	38.16	35.70	44.13	35.64	44.07	38.16	44.09	38.16	35.63

Note. The unit for shearing and compression stiffnesses is 10³ N/mm, while that for bending and torsion stiffnesses is 10⁶ N·mm/rad.