The calculational model was based on the 3D progressive damage theory,which can simulate the whole process of the composite laminates failure due to quasi-static pressure.
该计算模型基于有限元程序的三维逐渐损伤理论对层板的静压入全过程进行模拟,对逐层逐个单元的损伤进行判断,可以模拟任意角度、铺层厚度的层板在递增载荷下的逐渐损伤破坏过程。
The method uses the 3D progressive damage theory and analysis technique.
该方法应用三维逐渐累积损伤理论和分析技术,对层合板的冲击以及冲击后含损伤的层合板在压缩载荷下损伤扩展的全过程进行分析,分析中没有对冲击后层合板的损伤状态做人为假设,而是把冲击后层合板的预测损伤直接用于剩余压缩强度研究,从而不仅提高了最终失效载荷的预测精度,而且避免了为获得冲击后损伤状态参数所进行的大量试验,同时开发了模拟程序,该程序可以预测任意铺层角度、铺层厚度的层合板受外物冲击以及冲击后的损伤状态及在压缩载荷下的逐渐损伤破坏过程和最终失效载荷。
A three-dimensional parametric progressive damage model has been developed by integrating damage mechanisms for composite laminates containing an open hole subjected to static tensile loading.
针对面内静拉伸纤维增强复合材料含中孔层合板,发展了参数化三维逐渐损伤模型。
Three states of progressive failure were defined.
定义了三种逐渐破坏状态,利用Hoffman准则,考虑单层板的破坏对于刚度的影响,确定壁板的后屈曲承载能力。
This paper introduces the construction layout for the earth and rock projects,which is concluded by the practice,its main thought is got from using increasingly approximating method and straight line interpolation.
本文介绍土石方工程开挖和填筑轮廓线的放样方法,是在实际工作中总结出来的,主要思想方法是采用试算逐渐逼近和直线插值的思想方法获得,放样时只在施工现场测算而不需绘图,可达到快速、准确的要求。