What Are Mechanical Properties?

The mechanical properties of materials refer to the mechanical characteristics of materials under different environments (temperature, medium, humidity) under various external loads (tension, compression, bending, torsion, impact, and alternating stress).
Mechanical properties generally refer to mechanical properties

Chinese name: Mechanical properties
Nature: phenomenon

Features: Refers to materials in different environments
Advantages: Brittleness, strength,

Definition of mechanical properties

Mechanical properties:

Generally speaking, the mechanical properties of metals are divided into ten categories:

1. Brittleness Brittleness refers to a characteristic that the material does not undergo plastic deformation before being damaged. It is the opposite of toughness and plasticity. Brittle materials have no yield point, have breaking strength and ultimate strength, and they are almost the same. Cast iron, ceramic, concrete and stone are all brittle materials. Compared with many other engineering materials, brittle materials have weaker tensile properties. Compression tests are often used to evaluate brittle materials.

2. Strength: The ability of a metal material to resist permanent deformation or fracture under the action of a static load. At the same time, it can also be defined as the proportional limit, yield strength, fracture strength or ultimate strength. No exact single parameter can accurately define this characteristic. Because the behavior of a metal changes with the type of stress and its application. Strength is a very common term.

3. Plasticity: the ability of a metal material to undergo permanent deformation without damage under the load. Plastic deformation occurs when the metal material undergoes a stress exceeding the elastic limit and the load is removed, at which time the material retains some or all of the load's deformation.

4. Hardness: the ability of the surface of the metal material to resist the pressing of harder objects than him

5. Toughness: The ability of a metal material to resist impact loads without being damaged. Toughness refers to the characteristic that a metal material has a certain plastic deformation under the action of tensile stress before fracture occurs. Gold, aluminum, and copper are tough materials, and they can be easily drawn into wires.

6. Fatigue strength: the resistance of material parts and structural parts to fatigue damage

7. Elasticity Elasticity is a property that allows a metal material to return to its original dimensions when external forces disappear. Steel is elastic until it reaches its elastic limit.

8. Ductility Ductility refers to the material under the action of tensile or compressive stress before the material undergoes a certain plastic deformation characteristics. Plastic materials generally use rolling and forging processes. Steel is both plastic and ductile.

9. Rigidity Rigidity is the property of a metal material to withstand high stress without significant strain. The amount of rigidity is evaluated by measuring the elastic modulus E of the material.

10. Yield point or yield stress Yield point or yield stress is the stress level of the metal, measured in MPa. Above the yield point, when the external load is removed, the deformation of the metal still exists, and the metal material undergoes plastic deformation.