Lower Wishbone Control Arm
Triangular automotive wishbone with a pin and vertical roller at the inner pivots and a combined lateral + vertical ball-joint load (20, −110 N); demonstrates truss analysis for a real vehicle suspension component with irrational surd member forces.
Category: frame · Difficulty: Intermediate
Solution
| Support | Rx (N) | Ry (N) | Mz (N·m) |
|---|---|---|---|
| A | -20 | -147.5 | 0 |
| B | 0 | 257.5 | 0 |
| Member | Axial force (N) | Sense |
|---|---|---|
| Member 4 | 441.429 | Tension |
| Member 5 | 511.043 | Tension |
| Member 6 | -446.496 | Compression |
All reaction values are computed by the StatIQ structural engine, not generated text. Signs follow the solver's convention: a positive Ry acts upward, a negative Ry downward; a positive M is counter-clockwise.