In performing ecap , a material is subjected to intense plastic straining by pressing a sample repeatedly through a die containing two channels , with equal cross - sections , intersecting at an angle . equal channel angular processing of the medium carbon steel ( 0 . 45 wt . % Ecap变形是使试样通过横截面相等并成一定交角的两通道的模具中而产生强烈的塑性变形的一种变形方法。最近人们运用ecap变形方法成功地使低碳钢及珠光体钢组织超细化，关于这方面的研究已引起了人们的广泛关注。
We use bezier - shaped displacement reference curves to determine the new position of the vertices on the deforming surfaces . the proposed approach is fast and robust , and can support real - time interactive mesh editing and handle arbitrary meshes thanks to re - sampling and subdivision operations 这种变形方法计算快速便捷，可以方便地集成到现有曲面造型系统中，结合重新采样以及曲面细分等技术，这种曲面造型方法可以应用在任意拓扑结构的网格曲面编浙江大学硕士学位论文摘要辑上。
The results of case a and case b were about the same , thus it was displayed that modifying structure did not cause the bursting under low pressure but the damages of the structure . second , an analytical model was developed to assess the critical buckling problem of near surface interlaminar rectangular defects in the cylindrical part of srmcs under axis and interior pressure loads . the relationships between critical strain value and the parameters of geometry and radius of cylindrical were discussed 在最大压力为水检压力的作用下，应用有限元计算出壳体的整体变形以及不同部位的各种应力(不同应力分量)和位移分量，与试验结果均比较吻合，证明采用大变形方法分析壳体宏观应力和变形是合理的， a壳体与b壳体的应力、变形情况基本相同， b壳体发生低压爆破不是由于结构参数的调整造成，而是由于各种试验导致的累积损伤造成的。
