Unformatted text preview: Σ F x = 0 Σ F y = 0 Method of Sections 1) Find the resultant forces with methods from chapter 3 2) Pass a section cut through no more than 3-independent unknown forces 3) Draw a F.B.D. of the remaining section with cut member forces acting as applied loads 4) Solve for member forces using the Equilibrium Equations Σ F x = 0 Σ F y = 0 Σ M point = 0 Frames and Machines A Structure with at least one multi-force member To Solve for Member Forces 1) If when removing the supports the structure is still rigid, find the Reactions of entire structure using techniques from Chapter 3. 2) Locate the 2-Force members 3) Disassemble the entire structure, and draw F.B.D. of multi-force members. Take special care to properly draw the “Action-Reaction” pairs of forces between connected members. 4) Solve for the member forces using the Equilibrium Equations Σ F x = 0 Σ F y = 0 Σ M point = 0...
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- Spring '05
- Statics, Equilibrium Equations, resultant forces, Member forces, Equilibrium Equations ΣFx