As the material is deformed beyond the strain that elastic deformation persists, the stress is no longer proportional to strain, and permanent, nonrecoverable, or plastic deformation occurs.
当材料的
超出弹性
生的范围，
将不再与成正
，永久的、不可回复的生，即为塑性。
As the material is deformed beyond the strain that elastic deformation persists, the stress is no longer proportional to strain, and permanent, nonrecoverable, or plastic deformation occurs.
当材料的超出弹性生的范围，将不再与成正，永久的、不可回复的生，即为塑性。
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