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2009+4-2+EquilibriumofaRigid+BodyII

# 2009+4-2+EquilibriumofaRigid+BodyII - Introduction to Solid...

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1 SJTU Introduction to Solid Mechanics -Vm211 Chapter 4 Equilibrium of A Rigid Body Chapter 4 Equilibrium of A Rigid Body SJTU Introduction to Solid Mechanics -Vm211 To develop the equation of equilibrium for a rigid body Objectives To introduce the concept of the free the free- body diagram body diagram for a rigid body To show how to solve rigid body equilibrium problems using the equations of equilibrium Chapter 4 Equilibrium of A Rigid Body To develop the concepts of static and kinetic friction with applications with applications to equilibrium problems SJTU Introduction to Solid Mechanics -Vm211 Equilibrium in Three Dimensions Free-body diagrams The first step similar to the case of two dimensions is to draw a free-body diagram of the body ( or group of bodies considered as a system ) Chapter 4 Equilibrium of A Rigid Body z y x i 2 F r 1 F r 3 F r 4 F r SJTU Introduction to Solid Mechanics -Vm211 Chapter 4 Equilibrium of A Rigid Body Support reactions The reactive forces and couple moments acting on a member for various types of supports or constraints or connections, when the member is viewed in three dimensions, are listed as follows. Equilibrium in Three Dimensions Table 4-2 SJTU Introduction to Solid Mechanics -Vm211 Chapter 4 Equilibrium of A Rigid Body Equilibrium in Three Dimensions Support reactions It is important to recognize the symbols used to represent each of these supports and to understand clearly how the forces and couple moments are developed by each support.

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