Grinding

1, there is enough strength to ensure that components in the external force does not occur, is the prerequisite for the normal work of the component, the strength of the component is the ability to resist damage under the action of the component.

2, there is enough stiffness of the member in the role of the deformation should be within the allowable limits. The capability of resisting deformation under the action of external force is the rigidity of component.

3, there is sufficient stability of certain slender members (or thin-walled members) in the axial pressure to reach a certain value, will lose the original balance form and the loss of work ability, this phenomenon known as the instability. The so-called stability is the ability to maintain the original form of the structure.