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MEG 443/643
Problem 3-46, Text
1
3
2000 lb
2
2
1
1
3
E . 30 10⁶
A1 2 A2 2 A3 2
L1 30 L3 L1 L2 L1
cos 4
1 . 0 180 2 . 135 180 3 . 90 180
T1
cos( ) 1
sin( ) 1
0
0
sin( ) 1
cos( ) 1
0
0
0
0
cos( ) 1
sin( ) 1
0
0
sin( ) 1
cos( ) 1
= T1
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
T2
cos( ) 2
sin( ) 2
0
0
sin( ) 2
cos( ) 2
0
0
0
0
cos( ) 2
sin( ) 2
0
0
sin( ) 2
cos( ) 2
= T2
0.707
0.707
0
0
0.707
0.707
0
0
0
0
0.707
0.707
0
0
0.707
0.707
T3
cos( ) 3
sin( ) 3
0
0
sin( ) 3
cos( ) 3
0
0
0
0
cos( ) 3
sin( ) 3
0
0
sin( ) 3
cos( ) 3
= T3
0
1
0
0
1
0
0
0
0
0
0
1
0
0
1
0
element 1 between nodes 1 and 2 k1 . .
1
0
1
0
0
0
0
0
1
0
1
0
0
0
0
0
E^A1
L1
k2 . .
1
0
1
0
0
0
0
0
1
0
1
0
0
0
0
0
E^A2
L2 element 2 between nodes 2 and 3

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