Sterling All Terrain Towbar Engineering Certification



     

Roadmaster Inc.
Sterling Tow Bar
(ATM) 8000 Lbs. (3629 kg)

In accordance with Australian Design Rule 62/02.
Section 14.2.1

Linear Static Test performed utilizing MSCNastran FEA Analysis Software.


Load 1

Longitudinal Tension and Compression (Linear Static)
1.50 x 9.81 m/s² x 3629 kg = 53401 N
(1.50 x 32.17 ft/s² x 248.68 slugs = 12000 Lbs.)

Results

Total Translation / Deformation = 0.00617 m (0.243 in)

Contour Legend / Solid Von Mises  Stress
See view1.bmp
Range / 0 to 255106 kPa (0 to 37000 psi)


Load 2

Transverse Thrust (Linear Static)
0.50 x 9.81 m/s² x 3629 kg = 17800 N
(0.50 x 32.17 ft/s² x 248.68 slugs = 4000 Lbs.)

Results

Total Translation / Deformation = 0.00164 m (0.0646 in)

Contour Legend / Solid Von Mises Stress
See view2.bmp
Range / 0 to 255106 kPa (0 to 37000 psi)




View 49 View 50 View 51

   			 

Contour Legend Conversions:

psi			     kPa
18772			1.29 x 105
16059			1.10 x 105
13346			9.20 x 104
10632			7.33 x 104
7919			5.46 x 104
5206			3.59 x 104
2493			1.71 x 104
        -220.7		        -1.52 x 103
        -2934		        -2.02 x 104
        -5647		        -3.89 x 104
        -8360		        -5.76 x 104
        -11074		        -7.63 x 104
        -13787		        -9.50 x 104
        -16500		        -1.13 x 105
        -19214		        -1.32 x 105
        -21927		        -1.51 x 105
        -24640		        -1.69 x 105
Load 1  Results (Con�t.)

Contour Legend / Solid Von Mises Stress
See VIEW 52 / VIEW 53 / VIEW 54
Range / 5.98 x 105 to 0.320 x 100 kPa (86809 to 0.047 psi)



View 52 View 53 View 54

  

Contour Legend Conversions:

psi			    kPa
86809			5.98 x 105
81384			5.61 x 105
75958			5.23 x 105
70533			4.86 x 105
65107			4.48 x 105
59682			4.11 x 105
54256			3.74 x 105
48830			3.36 x 105
43405			2.99 x 105
37979			2.61 x 105
32554			2.24 x 105
27128			1.87 x 105
21702			1.49 x 105
16277			1.12 x 105
10851			7.48 x 104
5426			3.74 x 104
0.047			0.32 x 100
Load 2

Transverse Thrust @ 45? (Linear Static)
0.50 x 9.81 m/s? x 2721.08 kg = 13346.89 N
(0.50 x 32.17 ft/s? x 186.50 slugs = 2999.85 Lbs.)

Results

Total Translation / Deformation = 0.0026 m (0.105 in.)

Contour Legend / Solid Mean Stress
See VIEW 55 / VIEW 56 / VIEW 57
Range / 1.15 x 105 to �1.36 x 105 kPa (16740 to -19818 psi)


View 55 View 56 View 57

  

Contour Legend Conversions:

psi			    kPa
16740			1.15 x 105
14455			9.96 x 104
12170			8.39 x 104
9885			6.81 x 104
7600			5.24 x 104
5316			3.66 x 104
3031			2.09 x 104
          745.8		          5.14 x 103
        -1539		        -1.06 x 104
        -3824		        -2.63 x 104
        -6109		        -4.21 x 104
        -8394		        -5.78 x 104
        -10679		        -7.36 x 104
        -12963		        -8.93 x 104
        -15248		        -1.05 x 105
        -17533		        -1.20 x 105
        -19818		        -1.36 x 105
Load 2  Results (Con�t.)

Contour Legend / Solid Von Mises Stress
See VIEW 58 / VIEW 59 / VIEW 60
Range / 8.11 x 105 to 0.13 x 100 kPa (117696 to 0.018 psi)

View 58 View 59 View 60

  

Contour Legend Conversions:

psi			    kPa
117696		8.11 x 105
110340		7.60 x 105
102984		7.10 x 105
95628			6.59 x 105
88272			6.08 x 105
80916			5.57 x 105
73560			5.07 x 105
66204			4.56 x 105
58848			4.05 x 105
51492			3.55 x 105
44136			3.04 x 105
36780			2.53 x 105
29424			2.02 x 105
22068			1.52 x 105
14712			1.01 x 105
7356			5.07 x 104
0.018			0.13 x 100

		
	

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