Based on the crystal plasticity theory and mathematical theory of statistics, the relation of flow stressfluctuation quantity to grain dimension as well as billet dimensions was built.
基于晶体塑性理论及数理统计理论，建立了流动应力波动幅度与晶粒尺寸和坯料几何尺寸间的关系。
2
Either the maximum and minimum stresses of one of these and the mean stress-are required to specify the fluctuation.
最大应力和最小应力或二者之一和平均应力，以确定其起伏程度。
3
The fluctuation of stress-strain behaviors of importable materials are relatively small, which may be helpful for their processing properties.