断裂

Combining with the mechanics theory of yield and fracture of metal in classical mechanics and fracture mechanics,crack formation criteria of ductile metal in stress triaxiality space is deduced by studying fracture stress field in root of notched bar made by ductile metal.

结合经典力学和断裂力学对金属屈服和断裂解释的力学原理，通过对延性金属刻痕杆刻痕根部断裂应力场分析，推导了延性金属在应力三轴空间的微观裂纹形成准则。

Combining mechanics theory of yield and fracture of ductile metal in classical strength theory with microcosmic fracture mechanics,and by studying fracture stress field in root of notched bar made of constructional steel,the author brought forward loci equation of constructional steel in stress triaxiality space.

结合古典强度理论和微观断裂力学对金属屈服和断裂解释的力学原理，通过对结构钢深槽刻痕杆刻痕根部微观断裂应力场的数值模拟，导出了结构钢在应力三轴空间的屈服轨迹方程。

Experimental results demonstrate that when the tensile speed is fast, longitudinal volume electrical resistance decreases with the increasing of the stress, before the rupture the electrical resistance decreases to the most low, the moment the sample rupture, the electrical resistance increases suddenly. when the tensile speed is slow, longitudinal volume electrical resistance decreases with the increasing of the stress during the tensile prophase, before the rupture, the big surging of the electrical resistance occurres.

结果表明，CFRP复合材料在受力过程中，当拉伸速度较快时，试样的体积电阻随应力增加持续降低，在试样断裂前降至最低，但在试样断裂瞬间急剧增加；当拉伸速度较慢时，拉伸前期的电阻随应力增加不断降低，在断裂发生前电阻发生较大幅度的振荡。

Underground hydrothermal communicate with deep heat source near Huangzhuang-Gaoliying discordogenic fault. After abundantly absorbing the deep heat, some of it continue to travel to the base rock in the deep of the plain and some of it travel and becomes occurrence along Daliushu-Huluhe fault, which is held up at Asuwei-Xiaotangshan fault, and then drain along the carbonate rock karst fissure, ascend to the surface and thus the Xiaotangshan hot spring comes into being.

地下热水在黄庄—高丽营深大断裂附近与深部热源沟通，充分吸收深部热量后，一部分继续向平原区深部的基岩储层运移，一部分沿大柳树—葫芦河断裂和碳酸盐岩地层向北部运移、赋存，在阿苏卫—小汤山镇断裂处遇阻，沿碳酸盐岩岩溶裂隙排泄，上升至地表，形成小汤山温泉。

Starting from the study on 8 typical, open and sealed faults in Yanqi Basin, by using integral seismic-geologic methods, such as fault stress analytical method and fault smearing method, it is found out that the critical values of the fault as it is vertically and horizontally opened and sealed are 0.3333 MPa and 5 MPa respectively. It is pointed Out that because times and vertical and strike positions of the fault are different, the fault seal properties are different.

从焉耆盆地所开展的8条比较典型的开启或者封堵的断裂的研究入手，利用地震地质综合研究的方法―"断面应力分析法"和"断面物质涂抹法"，发现该盆地内的断裂在横向上和垂向上开启或者封堵时的"临界值"分别为0.3333和5 MPa，指出断裂的封堵性因其形成的时间、垂向上所在的部位和走向上所在的位置等方面的不同而不同。

Extraction and enhancement of alteration information and signature of freezing melting zone are also introduced in detail.

根据断裂构造(包括线性断裂、环状和弧形断裂构造)、地层、冻融带及蚀变带的解译，总结了西天山地区金矿成矿环境和成矿条件。

3The microcosmic analysis of drill pipes: Through comparison metallographic analysis of drill pipes, this paper finds out the ultimate reason which its" performance are difference, then uses SEM to analyze drill pipes and studies crack and acanthopore, measures local chemistry component and the influence that Shot-peened to performance of drill pipes in it"s inside thickening transitional region, measures microcosmic rigidity of drill pipes.

本文的创新点：(1)提出了钻杆失效的过程和概念模型，即内表面缺陷-解理断裂-裂纹疲劳扩展-过载断裂，为解决钻杆失效分析中存在的困惑(各项基本检测参数基本合格，刺穿和断裂仍有发生)提出了分析方法和手段。

The method is to use glutamate with certain concentration to induce DNA injury of PC12 cell line and observe the effect of agmatine on DNA fragment and mitochondrial function simultaneously.

在用一定浓度的谷氨酸诱导PC12细胞DNA断裂的同时，观察胍基丁胺对其DNA断裂和线粒体功能的影响，发现胍基丁胺能明显减轻谷氨酸诱导PC12细胞DNA断裂并能改善线粒体功能。

Jianchaling gold deposit belongs to the epithermal low temperature hydrothermal deposit with the auriferous mineralization strongly associated with the ultra basic rock,and the fault F 45 1 is acknowledged as main controlling structure.

煎茶岭金矿床是属于与超基性岩有密切成因关系的浅成低温热液型矿床，主控断裂为 F4 51 ，与 F4 51 断裂相关的次级断裂和张性裂隙构造是最重要的容矿构造。

The characteristics and influencing factors of various ductile fracture criteria were compressively analyzed. Ductile fracture criteria built on the theoretical basis of Lemaitres continuous medium damage-mechanics was chosen, and materials constants used in the ductile fracture criteria were calculated through the Role of Mixture.

综合分析了各种韧性断裂准则的特点及其影响因素，选择了在连续介质损伤力学Lemaitre的理论基础上建立的韧性断裂准则，应用混合法计算出了韧性断裂准则中的材料常数。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。