Circumferential Crack(周向裂纹)研究综述
Circumferential Crack 周向裂纹 - Circumferential cracks in the host pipe were also successfully spanned under water pressure and pipe bending. [1] Two types of micro-cracks including axial crack and circumferential crack, which both could happen in the reality operations, are considered. [2] Due to the centrosymmetric structure of the flexible annular disk, two typical cracks are studied in this paper; one is radial crack parallel to diameter, including radial closed crack (RC-crack) and radial opening crack (RO-crack); the other one is vertical crack perpendicular to diameter, including circumferential crack (CF-crack) and tangential crack (TG-crack). [3] , the droop-like cracking in the thickness and at the vicinity of hole, the wrinkling in peak-to-valley with partial cracking on the peaks, and the circumferential cracking. [4] Field transfer matrix is developed for straight pipeline conveying fluid, and point transfer matrix is derived for circumferential cracks damage based on spring hinge model, which could estimate the equivalent rotational stiffness by local flexibility coefficient method. [5] 658 GW cm−2, the single layer fragmentation, multiple layer fragmentation, circumferential crack, and radial cracks occur in that sequence. [6] Heat exchanger tubes in industrial pressure vessels typically require periodic inspection, and detection of circumferential cracks is one of the foremost issues. [7] For indented ice sheet bending failures, analytical ice load models have been developed by assuming a radial-before-circumferential cracking pattern. [8] For the tests above the ballistic limit, the plug fracture in the front plate of the RSW specimen could be caused by the thinning-induced necking in the BM near the HAZ, while the plug fracture in the rear plate of the RSW specimens may be consist of the circumferential cracking from the rear surface and the bending fracture of the hinged part of material. [9] The macroscopic and mesoscopic analyses reveal that the failure mechanism of WIZ under complicated unloading stress paths lays in the accumulation and propagation of axial and circumferential cracks and fractures, as well as pervasive particle breakage, with the intergranular fractures, transcrystalline fractures, and the shear scratches on a meso level. [10] The formation of circumferential cracks and higher porosity are the major issues of this process. [11] First, based on the J-integral and displacement extrapolation methods, the stress intensity factors of thin-walled cylindrical shells with circumferential cracks and compound cracks are studied using linear elastic fracture mechanics, respectively. [12] In thermal power generation equipment, circumferential cracking in boiler tubes due to thermal cycling is a problem. [13] % alumina resulted in the formation of circumferential cracks followed by lower plate fracture at low loading levels, and joints tested at higher loading magnitudes promoted pull-out fracture mode in nugget zones. [14] Piping system elbow study is the most important part in all fields of hydrocarbons transportation which presents the behaviour of circumferential crack at elbow extrados. [15] The fatigue life curve and fatigue limit were predicted by assuming that the notch was equivalent to a circumferential crack. [16] By comparing orifices with different shapes, it was found that the discharge from the circumferential crack was most sensitive to the main pipe flow velocity. [17] The failure is in the form of circumferential cracks in the vicinity of the weld. [18] The reason for the failure of this batch pipe is that, a large number of circumferential cracks appear on the outer wall of the pipe under the external force dominated by the bending stress, which reduced the overall internal pressure performance and caused the leakage failure of the pipe line. [19] Under small break condition, the circumferential cracks are safer than axial cracks. [20] Cracks, including radial and circumferential cracks, will appear on the surface of the glass material after the head impacts on the windshield. [21] Motivated by this need, the current paper focuses on the bending failures of a semi-infinite ice sheet, with a breaking pattern of radial before circumferential cracking. [22] The fracture of the Stellite coating samples mainly occurred in the light zone, which was caused by the formation and growth of circumferential crack and radial crack under high temperature and pressure conditions. [23] The results show that the circumferential crack of the convection tube belongs to fatigue fracture. [24] This study proposed a long-range non-destructive pipe inspection approach using linearly-polarized circular TE11 mode microwaves, enabling rapid detection of both axial and circumferential cracks on the inner surface of a metallic pipe. [25] Combining with the detection data of multiple highway tunnels in the field, the different types of tunnel cracks are divided, and the classification numerical statistics method is used to obtain that the number and length of annular cracks in highway tunnel cracks are significantly higher than those of the other two kinds of cracks, and the longitudinal cracks in tunnel crack cracking degree are greater than the circumferential cracks and the inclinded cracks. [26] In this paper, the optical method of transmitted caustics is extended to study the stress singularity at the tip of a circumferential crack in a PMMA cylindrical shell. [27] During the nanoindentation, it is noticed that the circumferential cracking and delamination occur in the coating and interface, respectively. [28] 5 μm) were adopted to better simulate the real crack, where both axial and circumferential crack were considered. [29] Experiments are performed on artificial defects on the cladding tube of real control rods to simulate short-circumferential grooves (SCGs), sliding wears (SWs), and circumferential cracks (CCs). [30]在水压和管道弯曲的作用下，主管的周向裂缝也成功跨越。 [1] 考虑了实际操作中可能发生的轴向裂纹和周向裂纹两种类型的微裂纹。 [2] 由于柔性环盘的中心对称结构，本文研究了两种典型的裂纹；一是与直径平行的径向裂纹，包括径向闭合裂纹（RC-crack）和径向张开裂纹（RO-crack）；另一种是垂直于直径的垂直裂纹，包括环向裂纹（CF-crack）和切向裂纹（TG-crack）。 [3] ，厚度和孔附近的下垂状开裂，峰谷起皱，峰部有部分开裂，周向开裂。 [4] 建立了直管输送流体的场传递矩阵，基于弹簧铰链模型推导了周向裂纹损伤的点传递矩阵，该矩阵可以通过局部柔度系数法估计等效旋转刚度。 [5] 658 GW cm-2，依次出现单层碎裂、多层碎裂、周向裂纹和径向裂纹。 [6] 工业压力容器中的换热器管通常需要定期检查，而圆周裂纹的检测是最重要的问题之一。 [7] 对于锯齿状冰盖弯曲失效，分析冰载荷模型已通过假设径向-前-圆周开裂模式来开发。 [8] 对于弹道极限以上的试验，RSW 试样前板的塞子断裂可能是由于 HAZ 附近 BM 的减薄引起的颈缩引起的，而 RSW 试样后板的塞子断裂可能是由后表面的圆周开裂和材料铰接部分的弯曲断裂。 [9] 宏观和细观分析表明，WIZ在复杂卸载应力路径下的破坏机制在于轴向和周向裂纹和断裂的积累和扩展，以及普遍的颗粒破碎，包括沿晶断裂、穿晶断裂和剪切划痕。中观水平。 [10] 周向裂纹的形成和较高的孔隙率是该过程的主要问题。 [11] 首先，基于J积分法和位移外推法，分别采用线弹性断裂力学研究了具有周向裂纹和复合裂纹的薄壁圆柱壳的应力强度因子。 [12] 在火力发电设备中，由于热循环导致锅炉管的周向开裂是一个问题。 [13] % 氧化铝导致形成圆周裂纹，随后在低载荷水平下下板断裂，并且在较高载荷量下测试的接头促进了熔核区的拉出断裂模式。 [14] 管道系统弯头研究是油气输送各个领域中最重要的部分，它展示了弯头外周环向裂纹的行为。 [15] 通过假设缺口相当于周向裂纹来预测疲劳寿命曲线和疲劳极限。 [16] 通过比较不同形状的孔口，发现环向裂缝的排放量对主管流速最为敏感。 [17] 失效的形式是焊缝附近的圆周裂纹。 [18] 该批管失效的原因是，在以弯曲应力为主的外力作用下，管外壁出现大量周向裂纹，降低了整体内压性能，造成管件泄漏失效。管道。 [19] 在小断裂条件下，周向裂纹比轴向裂纹更安全。 [20] 头部撞击挡风玻璃后，玻璃材料表面会出现裂纹，包括径向裂纹和圆周裂纹。 [21] 受这种需要的启发，目前的论文重点关注半无限冰盖的弯曲失效，在圆周开裂之前具有径向断裂模式。 [22] Stellite涂层试样的断裂主要发生在轻区，这是由于高温高压条件下圆周裂纹和径向裂纹的形成和扩展所致。 [23] 结果表明，对流管的周向裂纹属于疲劳断裂。 [24] 本研究提出了一种使用线性极化圆形 TE11 模式微波的远程无损管道检测方法，能够快速检测金属管道内表面的轴向和圆周裂纹。 [25] 结合现场多条公路隧道的检测数据，对隧道裂缝的不同类型进行划分，采用分类数值统计方法得出，高速公路隧道裂缝中环状裂缝的数量和长度明显高于隧道裂缝的数量和长度。另外两种裂缝，隧道裂缝开裂程度的纵向裂缝大于环向裂缝和倾斜裂缝。 [26] 本文将透射焦散的光学方法扩展到研究PMMA圆柱壳环向裂纹尖端的应力奇异性。 [27] 在纳米压痕过程中，注意到涂层和界面分别发生了圆周开裂和分层。 [28] 采用 5μm) 更好地模拟真实裂纹，其中考虑了轴向和周向裂纹。 [29] 对真实控制棒包壳管上的人工缺陷进行了实验，以模拟短周向凹槽 (SCGs)、滑动磨损 (SWs) 和周向裂纹 (CCs)。 [30]
stress intensity factor
In this paper, mode I stress intensity factors (SIFs) are calculated numerically by finite element software ANSYS, for a single semi-elliptical circumferential crack on a thick cylinder. [1] By evaluating the evolution of the radial and circumferential cracks, we find that maximum stress intensity factor for the radial crack is larger than the circumferential crack, both for internal and external cracks, which indicates that the radial crack is more dangerous than the circumferential crack for a cylindrical anode. [2] The computed Mode-I stress intensity factor and the measured fracture load are used to quantify the geometry factor for different depths of spiral crack in cylindrical specimens following Benthem’s circumferential crack solution approach. [3] In this study, the strength evaluation method of bonded round bar with adhesive layer is proposed by using the stress intensity factor of the circumferential crack near the interface and the circumferential interface crack in the bonded round bar. [4] In this study, the stress intensity factors of the circumferential crack near the interface and the circumferential interface crack are analysed by the crack tip stress method. [5]本文采用有限元软件 ANSYS 对厚圆柱上的单个半椭圆环向裂纹进行数值计算，以计算 I 型应力强度因子 (SIF)。 [1] 通过评估径向和周向裂纹的演变，我们发现径向裂纹的最大应力强度因子大于周向裂纹，无论是内部裂纹还是外部裂纹，这表明径向裂纹比周向裂纹更危险。圆柱形阳极。 [2] nan [3] 本研究利用粘结圆棒界面附近环向裂纹的应力强度因子和粘结圆钢的周向界面裂缝，提出了带胶层粘结圆钢强度评价方法。 [4] 本研究采用裂纹尖端应力法分析了界面附近环向裂纹和环向界面裂纹的应力强度因子。 [5]
thermo mechanically induced 热机械诱导
Two types of thermo-mechanically induced cracks were observed; radial cracks formed during heating and circumferential cracks that are formed during cooling. [1] This works aims at eliminating the formation of thermo-mechanically induced circumferential cracks in metallized through-glass via (TGV) substrates, aided by fundamental understanding the root cause for their formation. [2] This work aims at understanding and eliminating thermo-mechanically induced circumferential cracks that form during cooling for a 400 °C annealed copper (Cu) through-glass via (TGV) with a mean outer diameter of观察到两种类型的热机械致裂纹；加热过程中形成的径向裂纹和冷却过程中形成的圆周裂纹。 [1] 这项工作旨在消除金属化玻璃通孔 (TGV) 基板中热机械诱发的圆周裂纹的形成，这有助于从根本上了解其形成的根本原因。 [2] 这项工作旨在了解和消除平均外径为 <inline-formula> <tex-math notation ="乳胶">47 美元。 [3]
Wall Circumferential Crack
The purpose of this study is to investigate bending moment and the axial load capacity of a pressurized pipe suffering from a through-wall circumferential crack repaired by a composite sleeve. [1] To extend the range of validity of parameter ‘T’ as a function of ‘q’, experimental results of six piping components with through-wall circumferential crack made of SA333 Grade 6 steel tested earlier were also used similarly. [2]本研究的目的是研究受压管道的弯矩和轴向承载能力，该管道遭受了复合套管修复的穿墙周向裂纹的影响。 [1] 为了扩展参数“T”作为“q”函数的有效性范围，同样使用了先前测试的由 SA333 6 级钢制成的六个具有贯穿壁周向裂纹的管道组件的实验结果。 [2]
Induced Circumferential Crack 诱发周向裂纹
This works aims at eliminating the formation of thermo-mechanically induced circumferential cracks in metallized through-glass via (TGV) substrates, aided by fundamental understanding the root cause for their formation. [1] This work aims at understanding and eliminating thermo-mechanically induced circumferential cracks that form during cooling for a 400 °C annealed copper (Cu) through-glass via (TGV) with a mean outer diameter of这项工作旨在消除金属化玻璃通孔 (TGV) 基板中热机械诱发的圆周裂纹的形成，这有助于从根本上了解其形成的根本原因。 [1] 这项工作旨在了解和消除平均外径为 <inline-formula> <tex-math notation ="乳胶">47 美元。 [2]
circumferential crack near
In this study, the strength evaluation method of bonded round bar with adhesive layer is proposed by using the stress intensity factor of the circumferential crack near the interface and the circumferential interface crack in the bonded round bar. [1] In this study, the stress intensity factors of the circumferential crack near the interface and the circumferential interface crack are analysed by the crack tip stress method. [2]本研究利用粘结圆棒界面附近环向裂纹的应力强度因子和粘结圆钢的周向界面裂缝，提出了带胶层粘结圆钢强度评价方法。 [1] 本研究采用裂纹尖端应力法分析了界面附近环向裂纹和环向界面裂纹的应力强度因子。 [2]