无裂纹的 meaning in English

flawless
leakless

3d numerical simulation of finete element method ( fem ) program is used to calculate and analyse the distribution of stress and strain during hydrobulging , the ovality of single - curvature polyhedron after being hydrobulged while the dimension of polar plate of single - curvature polyhedron without the flaw of imaginary crack changes
摘要利用三维数值模拟方法，对假想无裂纹的单曲率多面壳体模型上极板尺寸发生变化时胀形过程中应力应变的分布、胀形结束后多而壳体的不圆度等进行了计算和比较。