shaft_bending (www.theengineeringcommunity.org).xls

	B	C	E	F	G	H	I	J
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2	shaft_bending.xls
3	To help design shafts in bending at stress concentration region
4	By Alex Slocum, last modified 2/12/2004 by Alex Slocum
5	Enters numbers in BOLD, Results in RED
6
7	Large diameter, D	14	Case 1: with radius between diameters			Case 2: with radius undercut between diameters
8	Small diameter, d	8
9	Bending moment (N-m)	10
10	Major shaft diameter	14
11	Transition radius (mm)	0.5
12	Fillet stress concentration factor, Kt	2.89
13	Undercut stress concentration factor, Kt	1.99
14	Inertia I at fillet shaft diameter (mm^4)	201	radius r (mm)	Kt	Stress (Mpa) t/G	Shaft min d	Kt	Stress (Mpa) t/G
15	Inertia I at undercut shaft diameter (mm^4)	118	0.1	11.16	222.1	7.80	2.66	57.10
16	Fillet design bending stress (MPa)	575	0.2	5.93	117.9	7.60	2.40	55.62
17	Undercut design bending stress (MPa)	592	0.3	4.22	84.0	7.40	2.21	55.67
18			0.4	3.39	67.4	7.20	2.09	56.95
19			0.5	2.89	57.5	7.00	1.99	59.15
20			0.6	2.56	51.0	6.80	1.92	62.15
21			0.7	2.33	46.4	6.60	1.86	65.90
22			0.8	2.16	42.9	6.40	1.81	70.42
23			0.9	2.02	40.2	6.20	1.77	75.76
24			1	1.92	38.1	6.00	1.74	82.01
25			Case 3: with hole in the middle			Case 4: with slab in the middle, where corner radius is r, width is b=D/4, and depth is t=D/8
26			Case 3: with hole in the middle
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33			Hole d (mm)	Kt	Stress (Mpa) t/G	radius r (mm)	Kt	Stress (Mpa) t/G
34			1	1.31	5.55	1	1.51	5.61
35			2	1.38	6.77	2	1.32	4.92
36			3	1.43	8.32	3	1.25	4.63
37			4	1.46	10.53	4	1.21	4.47
38			5	1.49	14.05	5	1.18	4.37
39			6	2.74	37.29	6	1.16	4.29
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