直裂纹 meaning in Chinese
vertical crack
Examples
- The first fundamental problem of the crack and hole in the infinite plane
无限大平面孔洞下直裂纹的第一基本问题的数值解法 - A dynamic fracture analysis of center - cracked brazilian disc specimens under mixed mode diametric impact loading
径向冲击中心直裂纹巴西圆盘的复合型动态断裂分析 - Disc specimens have great application in testing the mechanic properties of rock , such as the cracked chevron notched brazilian disk ( ccnbd ) and the cracked straight - through brazilian disc ( cstbd ) used in testing rock fracture toughness , the brazilian disc and the flatted brazilian disc ( fbd ) used in testing rock tensile strength
圆盘类试样在岩石的力学性质测试中有着广泛的应用。如应用于岩石断裂韧度测试的人字型切槽巴西圆盘( ccnbd ) ，中心穿透直裂纹巴西圆盘( cstbd ) ，应用于岩石抗拉强度测试中的巴西圆盘试样和平台巴西圆盘( fbd )等试样。 - The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks , detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack , a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading . the distributions of tz are minutely studied in the forward section of the cracks . strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions
全文主要研究内容和学术贡献如下: 1 .针对一般三维裂纹端部场应力约束准确解析的困难,对均匀拉伸载荷作用下各向同性弹性板中穿透厚度中心直裂纹、半椭圆表面裂纹和1 / 4椭圆角裂纹进行了大量详细的全场应力三维有限元分析,首次全面分析了非穿透裂纹端部场三维影响区范围,给出了不同形状三维裂纹前沿离面应力约束因子tz的数值解,并结合k场平面解给出了非穿透裂纹端部应力场k - tz双参数描述。