As the tension of the heat treatment rose,the crimp frequency and the crimp radius of the monofilament went down,the crimp elongation rate went down,the crimp recovery rate and the crimp modulus of the monofilament and multifilament went up.
结果表明:随着热处理张力的增加,单丝的卷曲数和卷曲半径减小,单丝和复丝的卷曲伸长率减小,卷曲弹性回复率增加,卷曲模量增加;随着热处理温度的增加,单丝的卷曲数增加,卷曲半径减小,单丝和复丝的卷曲伸长率减小,卷曲弹性回复率增加,卷曲模量增加;在温度100～120℃且张力较小的条件下进行热处理时,PET/PTT纤维的单丝和复丝的卷曲弹性较好。
The corresponding rolled-up radius is thus determined.
结果表明,预应力柱壳总应变能有两个极小值,故柱壳存在两个稳定状态,通过计算得到了结构卷曲半径的大小。
The calculating formulae for critical curling angle α0, free curling radius ρ, curling interference radius ρe, the plastic condition of the tube edge crack ρp and the processing force applied during inversion.
研究了翻管过程所经历的几个典型瞬时状态,从理论上导出锥形模翻管由扩口→卷曲→翻卷变形模式的转化条件,并经实验修正,从而提出了模具的卷曲临界角a_0、自由卷曲半径ρ、卷曲干涉半径ρ_e、管端开裂的塑性条件ρ_塑和翻管工艺力P_(min)等用于现实工程的计算式。
By constructing a metal cutting model using slip-line field theory, chip curling radii are predicted theoretically in orthogonal cutting processes.
通过采用滑移线场理论，建立了一种正交切削模型，使用这一模型，从理论上预测了切屑卷曲半径。