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Chapter 12

Equilibrium and Elasticity

静态平衡 - I
静态平衡 - I
A rigid body is said to be in dynamic equilibrium when both its linear and angular acceleration are zero, relative to an inertial frame of reference. This ...
静态平衡 - II
静态平衡 - II
Static equilibrium is a special case in mechanics that is very important in everyday life. It occurs when the net force and the net torque on an object or ...
重心
重心
The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the ...
找到重心
找到重心
The center of gravity of a body is an imaginary point where the body's total weight is assumed to be concentrated, and the body is perfectly balanced. ...
刚体平衡问题 - I
刚体平衡问题 - I
A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body ...
刚体平衡问题 - II
刚体平衡问题 - II
A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero. Consider two children sitting on a ...
强调
强调
When a force is applied on a body, it undergoes deformation. In order to restore the body to its original shape and/or size, an opposite or restoring ...
应变和弹性模量
应变和弹性模量
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or ...
应力和应变问题解决
应力和应变问题解决
Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull ...
不确定结构
不确定结构
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static ...
弹性
弹性
Elasticity is the ability of an object to withstand the effects of distortion and to return to its original size and shape once the forces causing ...
可塑性
可塑性
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. ...
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