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在敲击法测定高压电瓷动弹性模量中,本文给出一种修正方法。应用这种修正方法计算出园形截面试样在各种纵横比下的修正系数。为说明修正的有效性,一方面用矩形截面试样测定动弹性模量,另一方面用静态电测法测杨氏模量。结果表明,经过改进的敲击法测定的动弹性模量与电测法测试结果极为接近,相差约4%。还探讨高压电瓷动弹性模量的分布以及动弹性模量和强度的相互预测。曲线拟合和重复性试验表明,高压电瓷动弹性模量服从复合型威尔分布。并且,在均值意义下,高压电瓷动弹性模量和强度相互预测具有满意的精度。
In the knocking method for the determination of dynamic elastic modulus of high voltage electric porcelain, a correction method is given in this paper. This correction method is used to calculate the correction factor for the round section specimen at various aspect ratios. To illustrate the effectiveness of the correction, on the one hand, the dynamic modulus of elasticity was determined with rectangular section specimens, and on the other hand, the Young’s modulus was measured with static electrical measurements. The results show that the dynamic elastic modulus measured by the improved knocking method is very close to the electrical test results, with a difference of about 4%. The distribution of high-voltage electric porcelain dynamic elastic modulus and the mutual prediction of dynamic elastic modulus and strength are also discussed. Curve fitting and reproducibility tests show that the dynamic elastic modulus of high-voltage electric porcelain follows the composite Weir distribution. And, in the mean sense, the high-voltage electric porcelain dynamic elastic modulus and strength mutual prediction have satisfactory accuracy.