Insitu tensile tests with special designed SEM have been conducted to trace the whole process of crack initiation and propagation induced by inclusion in ultrahigh strength steel. 采用扫描电镜原位观测法,跟踪观察了航空用超高强度钢中长方型夹杂物导致裂纹萌生与扩展的微观行为。
Experiments were conducted to examine the process of nugget initiation and growth. 试验考察了熔核的形成和长大过程。
Using the method of ALE arithmetic of LS-DYNA to simulation the formation process and the initiation process of shelled explosive of shaped charge jet. 利用非线性有限元程序LS-DYNA中的ALE算法对聚能射流的成型、冲击引爆带壳炸药作用过程进行了数值模拟研究。
An integrated approach has been used to analyze the whole process of damage initiation and development for composite laminates under the impact loading as well as the tensile loading after impact, in which the 3D progressive damage theory was applied. 应用三维逐渐累积损伤理论和分析技术对层合板的冲击及冲击后含损伤的层合板在拉伸载荷下损伤扩展的全过程进行分析。
Mathematical Models for the Stabbing Process in Stab Initiation 针刺起爆中针刺过程数学模型的建立
According to this model, we have simulated the process of shock initiation and detonation wave propagation of PBX 9404 by means of a one dimensional characteristic code. 利用一维特征线程序模拟该炸药的冲击波起爆过程和爆轰波传播过程。
However, as an instantaneous and instable phenomenon, it still suffers from the typical rock failure process& the initiation, propagation and coalescence of micro-fracture. 但岩爆作为一种失稳破坏现象,尽管其发生过程短暂,但仍然经历了孕育、发生和发展这一岩石破裂所具有的共同特征。
The whole metal crack monitoring process, including crack initiation, propagation and fracture, has been studied based on PVDF, which shows obvious advantages of fast response and area monitoring. 利用聚偏二氟乙烯(PVDF)压电薄膜响应快、可用于面监测的独特优点,对金属构件的裂纹萌生与扩展、断裂全过程进行了监测实验研究。
The micro process of crack initiation and propagation in H68 brass with low stock fault energy was observed by in situ tensile test in TEM. 采用透射电镜动态拉伸、原位观察研究了低层错能合金H68黄铜断裂的微观过程。
The process of crack initiation and propagation was observed through replication, and the effect of grain size on the behaviour of short fatigue cracks was studied. 应用复型技术监测了短裂纹形成与扩展过程,研究了晶粒尺寸对短裂纹行为的影响.结果表明:裂纹形成几乎贯穿于整个疲劳过程;
Based on the process of microcracking from the initiation, stable growth to unstable growth of microcracks, the formation of main cracks and their further development are studied, and the corresponding constitutive relations of the damaged medium and fracture propagation criteria are established. 文中从损伤材料中微裂纹等缺陷的拉裂扩展过程,研究宏观断裂的形成与发展,并由此建立了相应的本构关系和断裂判据。
In the stage from spikelet initiation to flowering ( the middle stage), Cd toxicity mainly reflected on inhibition of the process of spikelet initiation and development. 幼穗分化至抽穗期(中期)主要抑制幼穗的分化与发育过程;
Tooth morphogenesis is a series of process including the initiation of organogenesis and the regulation of structures. 牙齿形态发生包括一系列决定器官发育启始和结构调控的过程。
The feature of the deformation and fracture of PET and PAN fibers being in tension in specimen chamber of a scanning electron microscope were observed and the micrographys revealing the process of crack initiation and development and failure of the fibers Were photographed. 在扫描电子显微镜样品室中拉伸PET和PAN纤维,动态观察了纤维的形变和断裂行为,用照片记录了裂缝发生、发展和纤维最终断裂的过程。
Lagrange method was used to simulate the process of condensed explosive initiation by percussion. Axisymmetric and 3D nonlinear finite element models were established. 对凝聚炸药撞击起爆过程进行了Lagrange算法的数值模拟,建立了二维轴对称及三维非线性有限元模型。
On this foundation we will melt conference control process, the control process of initiation and joining, depict detailed meeting model. 在此基础上本文将进一步细化会议流程,分析各会议元素的基本功能,详细描述会议的发起、注销、加入等控制过程,刻画出详尽的会议模型。
The fracture procedure is a whole process of crack initiation, crack propagation and final fracture. 材料断裂过程为裂纹萌生、扩展和最后断裂过程,组织及实验条件对材料断裂有较大影响。
Effect of Different Deoxidization degrees in steel-making process on PITTING INITIATION susceptibility 炼钢脱氧程度对钢材点蚀诱发敏感性的影响
The new type initiation for the shaped charge of torpedo are studied, the theory and the action process of the initiation has been fully described. 对鱼雷聚能战斗部的新型起爆技术进行了理论分析和原理描述,介绍了鱼雷聚能战斗部新型起爆方式的结构和作用过程。
The process of initiation and extension of crack were in situ observed with plate and foil specimens in SEM and TEM. 在SEM、TEM下原位观察了板状和薄膜状合金试样中裂纹产生及扩展的动态过程。
Positions and process of fatigue crack initiation in welded construction 焊接结构中疲劳裂纹形成位置与过程
A metallographic investigation was made to follow the dynamical process of the initiation and propagation of hydrogen induced delayed cracking ( HIDC) toward a charged modified WOL specimen made of high strength Al alloy. 用恒位移试样跟踪观察了铝合金在电化学充氢和应力腐蚀条件下氢致裂纹的产生和扩展过程。
The micro process of crack initiation and propagation in austempered ductile iron has been investigated by scanning electron microscope with a micro tensile stage. 用扫描电子显微镜及微拉伸台对奥氏体-贝氏体球墨铸铁裂纹萌生、扩展的微观过程进行了跟踪观察。
The process of shock initiation of the explosive energetic fragment was studied. 全文开展的主要工作和主要结论如下:1对爆炸型含能破片冲击起爆过程进行了研究。
The deposition of lipoprotein into intima is the fundamental process in the initiation of atherosclerosis and the mechanisms of which is still unknown. 动脉内膜下脂质沉着是AS形成初期的一个必经过程,其机制仍不清楚。
MFC is involved in recruitment of the ternary complex ( TC) and recognition of the correct start codon. It plays a critical role in the process of translation initiation. MFC在真核生物蛋白质翻译起始过程中起重要作用,主要参与蛋白质重起始过程中二元复合物(TC)的招募和AUG起始密码子的正确识别。
The use of stress theory is difficult to describe the real process of fracture initiation and propagation accurately and reasonably. 运用应力场理论难以准确合理地描述裂缝真实的启裂扩展过程。
In this dissertation, the reaction rate of Insensitive High Explosives ( IHE) in the process of shock initiation and the constitutive relationships of overdriven detonation products are mainly introduced. 本文主要介绍了钝感炸药的冲击起爆过程化学反应速率以及超压爆轰产物状态本构关系。
This process could be divided between initiation and progression stage. 简单的划分这一演化过程,可以分为起始期和发展期两个阶段。
After proto-oncogene neul in the ovary was knocked down, there was a significant change in the expression of genes related to neul signal pathway ( i.e. Cln3) during the process of the initiation of primordial follicle growth. 敲减卵巢中原癌基因neu1后,导致与neu1信号通路相关基因Cln3在原始卵泡启动生长过程中表达发生显著变化。