49325CAMD-Computer-Aided Mechanical Design - IT Computer Science Assignment Help

Assignment Task

Task

Assesment: Computer-Aided Mechanical Design 

Question:

For a two-dimensional plane truss structure shown in Figure 1, the truss consists of three elements, and all the truss members have a uniform cross-sectional area of A = 100 mm2  and the same Young’s Modulus E = 200 GPa. The elemental lengths L are shown in the figure. Node 1 and node 2 are fixed and a force F = 10 kN is applied at the node 3 in the global x-direction. 

Using the finite element method and hand calculation, determine:

1. Displacements at the node 3.
2. The axial stresses within each element.

Question:

If we define l=cos? and m=sin?, the general formulation of the stiffness matrix for any of the truss bar element can be given as follows: 

Question:

How to calculate the axial force and stress for a truss bar element with a space angle ?? 

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