A seven-member planar truss with pin joints is shown in fig


A seven-member planar truss (with pin joints) is shown in Fig. 12.18. Each of the seven members has an area of cross section of and a Young s modulus of 207 GPa.

(a) Label the complete set of local and global nodal displacement degrees of freedom of the truss. Assume the X and Y coordinates shown in Fig. 12.18 as global coordinates.

(b) Find the coordinate transformation matrix of each member.

(c) Find the local and global stiffness matrices of each member.

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Mechanical Engineering: A seven-member planar truss with pin joints is shown in fig
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