In a 3-D truss element nodal displacement vector in a local co-ordinate is q’= ___
a) [q1‘]
b) [q2‘]
c) [q1‘,q2‘,q3‘]T
d) [q1‘,q2‘]T
Answer: d
Explanation: Local co-ordinates are measurement indices into a local co-ordinate system or local co-ordinate space. Nodes will have nodal displacements or degrees of freedom which may include translations, rotations, and for special applications, higher order derivatives of displacements.
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