The mechanical properties of materials refer to the properties of materials that deform and resist damage under the action of external forces
1. Strength
①The strength of the material
②Strength grade
③Specific strength
2. Deformation properties of materials
① Elasticity and plasticity
Elasticity: The material deforms under the action of external force. When the external force is removed, the property that the deformation can be completely restored is called the elasticity of the material.
Plasticity: The deformation of a material under the action of an external force. After the external force is removed, the material still retains the shape and size of the deformed material, which is called the plasticity of the material.
②Brittleness and toughness
Brittleness: The property of a material without significant deformation and sudden destruction under the action of external force. Materials with this property are called brittle materials.
Toughness: The property of a material that can withstand large deformation without sudden damage under impact and vibration loads. Materials with this property are called ductile materials.
3. Material durability