( ) is an important means of strengthening metal materials.
A: elastic deformation
B: plastic deformation
C: stretching
D: fibrous structure
A: elastic deformation
B: plastic deformation
C: stretching
D: fibrous structure
举一反三
- 韧度是衡量材料韧性大小的力学性能指标，是指材料断裂前吸收( )的能力。 A: Plastic deformation work and fracture work B: Elastic deformation work and plastic deformation work C: Elastic deformation work and fracture work D: Plastic deformation work
- 韧度是衡量材料韧性大小的力学性能指标，是指材料断裂前吸收( )的能力。 A: Plastic deformation work and fracture work B: Elastic deformation work and plastic deformation work C: Elastic deformation work and fracture work D: Plastic deformation work
- 形变强化是材料的一种特性， 是( )阶段产生的现象。 A: Elastic deformation B: Impact deformation C: Uniform plastic deformation D: Yield deformation
- 形变强化是材料的一种特性， 是( )阶段产生的现象。 A: Elastic deformation B: Impact deformation C: Uniform plastic deformation D: Yield deformation
- Generally, ductility coefficient of a structure is defined as the ratio of maximum allowable deformation and yield deformation of a member or structure when the bearing capacity of the structure is not less than ( ) of its ultimate bearing capacity. A: 70% B: 80% C: 85% D: 90%