microcracks相关论文
Effect of neodymium on the formation of the craters generated on the Al-17.5Si alloy surface treated
Now days high current electron beam(HCPEB)is an important tools for modification of materials surface,but microcracks an......
A THEORY OF EFFECTIVE THERMAL CONDUCTIVITY FOR MATRIX-INCLUSION- MICROCRACK THREE-PHASE HETEROGENEOU
本文通过对荣华二采区10...
There are favorable exploration prospects in igneous rock reservoirs.However,problems of borehole instability occur freq......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Particulate TiC reinforced 17-4PH and 465 maraging stainless steel matrix composites were processed by conventional powd......
Steel reinforced TiC composites are an attractive choice for wear resistance and corrosion resistance applications. TiCr......
A THEORY OF EFFECTIVE THERMAL CONDUCTIVITY FOR MATRIX-INCLUSION- MICROCRACK THREE-PHASE HETEROGENEOU
The effective thermal conductivity of matrix-inclusion-microcrack three-phase heterogeneous materials is investigated wi......
Computer experiments were performed on simulated polycrystalline material samples that possess locally anisotropic micro......
某型号履带式液压挖掘机在装配过程中个别履带螺栓发生断裂。通过宏观形貌观察、扫描电镜形貌分析、能谱元素分析、金相组织检测、......
为了研究糙米受机械力时应力裂纹的生成扩展机理,采用TMS-PRO质构仪分别测定心白、腹白、无垩白糙米的压缩力学特性,并对试验前和......
为提高氧化镁陶瓷抗热震性和烧结性能,以高纯纳米氧化镁为主要原料,高纯纳米氧化钇粉为添加剂,聚乙烯醇为结合剂,制备了氧化镁陶瓷......
借助扫描电镜(SEM)原位拉伸观察了纯钼退火态纤维状组织断裂过程中裂纹萌生与扩展的动态变化过程,对其微观断裂特征进行了研究.结......
目的对比分析不同托槽粘结剂脱粘前后釉质微裂纹的变化。方法收集因正畸需要拔除的新鲜前磨牙90颗,将其分为两组,每组45颗,第一组:......
用边界元方法定量地计算出骨料离主裂纹尖端的位置、弹模比、骨料与基质交界面微裂纹的长度等对混凝土断裂性能的影响,从而把骨料增......
为了研究经过预烧的红柱石粗颗粒对莫来石-刚玉耐火材料抗热震性的影响,将20%(w)的未经预烧或分别经1300、1400、1500、1600℃保温......
通过单轴压缩试验和细观损伤特征量化试验,对经历20、100、300、450、600℃五种温度循环后的四川锦屏大理岩试样的宏观力学性质及......
通过对砂岩进行加温三轴试验,分析了超声波速度与应力的关系,根据实验结果,提出了一种以横波速度最大值评价砂岩试件微裂纹开始产生时......
在陶瓷与金属或陶瓷与陶瓷(采用金属中间层)的连接过程中,陶瓷与金属的热膨胀系数等性质存在差异而产生的残余热应力是连接接头强......
分析了推进剂内部初始裂纹在机械冲击载荷作用下的扩展以及与反应气体产物相互作用. 利用I、II型裂纹扩展、推进剂分解化学动力学......
Impact-induced damage to jointed rock masses has important consequences in various mining and civil engineering applicat......
In this study,morphological and microstructural analyses were conducted on net-shaped microcracks appearing on the surfa......
在地质流体研究领域,流体包裹体面(Fluid Inclusion Plane-FIP)作为能将地质流体的活动与特定构造和岩浆作用相联系的一种手段,正......
本文结合我国某新型号机枪枪管的研制工艺,对涂层微裂纹组态、控制因素及其与破坏模式的关系进行研究.鉴于微裂纹的纳米级宽度,本......
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对连续体损伤力学在微裂纹屏蔽问题中应用的J积分守情理假设提出质疑,用理论分析和电算实践证明了远场J积分在微裂纹损伤区中的再分配......
In the last decade a New Geophysics has been proposed,whereby the crust and uppermost~400 km of the mantle of the Earth ......
采用细观力学方法提出一个岩石各向异性损伤和渗流耦合的细观模型。其中,岩石的损伤由裂纹的状态变量来表示,损伤演化通过裂纹扩展......
采用微裂纹扩展域的概念,准确地描述了岩石中微裂纹的损伤状态,解决了任意复杂加载路径下的岩石损伤演化问题.用有效场方法来计算......
和所有人造的结构材料一样,骨在重复载荷作用下也会发生疲劳断裂.近年来,在骨疲劳损伤领域的研究已取得较大发展.本文综述了骨疲劳......
This paper presents a new description for brittle solids with micro-cracks under plane strain assumption.The basic idea ......
This paper presents a new description for brittle solids with micro-cracks under plane strain assumption.The basic idea ......
混凝土结构的尺寸效应是近几十年来一个十分重要的研究领域.应用材料破坏过程分析软件MFPA2D,把混凝土视为水泥沙浆、骨料及两者间......
本文研究了在 ZrO_2量为17~78mol%(15~75vol%)的 ZrO_2/Al_2O_3复合材料中 ZrO_2颗粒的分布、晶型以及 Al_2O_3与嵌在 Al_2O_3晶粒内......
在单向压缩应力状态下岩石微观断裂过程及微裂纹演化的试验研究结果的基础上,采用现代非线性科学的分岔、混沌和自组织理论,对微裂......
本文对一凸轮的表面裂纹进行了分析。渗碳后表层残余奥氏体含量过高级网状碳化物导致该凸轮在精磨过程中出现了磨削裂纹,本文还提出......
泥页岩中存在丰富的微孔隙及微裂隙,这些微孔隙及微裂隙是泥页岩的存储空间与流通通道,对页岩气开采有着重要的意义。用氩离子抛光制......
本文对65Mn钢带在制作直缝焊管时出现开裂的原因进行了分析。采用金相显微镜和扫描电镜对开裂部位和未开裂部位试样的组织、断口形......
This study develops a mesoscopic framework and methodology for the modeling of microcracks in concrete. A new algorithm ......
本文通过起裂源粒子的特征和尺寸分布、裂源处显微组织和残留裂纹的尺寸分布情况,研究了C-Mn钢和两种焊缝金属的Charpy V,COD和预......
本文从腐蚀角度讨论了广石化炼油厂脱硫制硫车间吸收塔(T203)产生微裂纹的原因是硫化氢应力腐蚀开裂(SSCC)。......
We identify two interrelated but independent species of microcracks with differentorigins and different distributions. O......
通过解析和数值的方法研究了二维微裂纹体有效模量和有效导电系数之间的关联.针对二维含有任意取向和平行的微裂纹介质,通过基于象......
基于一组实验结果 ,讨论了岩石标本的非均匀性 (预存微裂纹和宏观裂纹 )对声发射时空分布的影响 .对比分析表明 ,预存微裂纹的存在......
In order to better understand the fatigue mechanisms of steel structures working under high temperature, a multi-scale f......
An analysis of polymer materials behavior under cutting forces load was presented.The analysis was accomplished taking i......
The microfractures and natural fractures studies have a great significance in the hydrocarbon accumulation exploration a......
By using the concept of domain of microcrack growth(DMG),themicromechanisms of damage in quasi-brittle materials subject......
A THEORY OF EFFECTIVE THERMAL CONDUCTIVITY FOR MATRIX-INCLUSION-MICROCRACK THREE-PHASE HETEROGENEOUS
The effective thermal conductivity of matrix-inclusion-microcrack three-phase heterogeneousmaterials is investigated wit......
本文针对相变颗粒增韧陶瓷基复合材料中存在大量微裂的现象,分析了微裂纹产生的原因,利用作者改进的等效平杂理论,研究了相变陶瓷中微......
利用细观力学的Eshelby和Mori-Tanaka理论,考虑纤维和微裂纹之间的相互作用,研究了定向分布微裂纹的演化规律及其对材料力学性能的影响,分析了纤维体积份......