Gotowe bibliografie tematyczne / Local thinning

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Gotowa bibliografia na temat „Local thinning”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Local thinning"

Ahn, Seok Hwan, Kum Cheol Seok, and Ki Woo Nam. "Characteristics of Strength and Deformation of Inner/Outer Local Wall Thinned Straight Pipes." Key Engineering Materials 353-358 (September 2007): 559–62. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.559.

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The experimental and the analysis for effects of circumferentially local wall thinning on the fracture behavior of pipes were carried out. Local wall thinning for experimental was machined on the outside of pipes in order to simulate the metal loss due to erosion/corrosion. In addition, the pipes with local wall thinning on the inside were carried out FE analysis, and it made a comparative study with that of outside. Failure mode could be classified into ovalization, local buckling and crack initiation depending on the thinned length and thinned ratio. Three-dimensional elasto-plastic analyses

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Ge, Lei, Qiu Chen, Shuai Wang, et al. "Enhancement Mode Ga2O3 Field Effect Transistor with Local Thinning Channel Layer." Crystals 12, no. 7 (2022): 897. http://dx.doi.org/10.3390/cryst12070897.

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β−Ga2O3 field−effect transistors (FETs) were fabricated with and without local thinning to change the threshold voltage. A 220 nm Ga2O3 layer was mechanically exfoliated from a Cr−doped gallium oxide single crystal. Approximately 45 nm Ga2O3 was etched by inductively coupled plasma to form the local thinning. The threshold voltage of the device with etched local thinning increased from −3 V to +7 V compared to the unetched device. The effect of the local thinning was analyzed by device simulation, confirming that the local thinning structure is an effective method to enable enhancement−mode Ga

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Takahashi, Koji, Kotoji Ando, Akihiko Kato, Yusuke Kimura, Masakazu Hisatsune, and Kunio Hasegawa. "OS12W0350 Fracture strength of tee pipe with local wall thinning." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS12W0350. http://dx.doi.org/10.1299/jsmeatem.2003.2._os12w0350.

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Tada, Naoya, and Manabu Nohara. "Evaluation of semi-ellipsoidal wall thinning on back surface of plate by direct-current potential difference method." International Journal of Structural Integrity 6, no. 6 (2015): 714–24. http://dx.doi.org/10.1108/ijsi-11-2014-0062.

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Purpose – Local wall thinning is one of serious problems in aged power generating plants. As the thinning grows inside the pipes, it is difficult to detect and evaluate it from the outer surface of pipe. The purpose of this paper is to evaluate the method of semi-ellipsoidal wall thinning geometry on the back surface of flat plate by direct-current potential difference method (DC-PDM) was proposed as a preliminary research for the pipe wall thinning evaluation. The evaluation was performed for the potential difference numerically obtained by finite element method and the results were discussed

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Bo Dinh, Hong. "Proposed Equation of Maximum Principal Stress for Feedwater Heater Tubes with Circumferential Hoop Flaw Defect." International Research Journal of Innovations in Engineering and Technology 09, no. 05 (2025): 489–94. https://doi.org/10.47001/irjiet/2025.905055.

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Feedwater heater tubes with local wall-thinning defects are often found in the heat exchangers of thermal power plants. One of the most typical local wall-thinning shapes is circumferential hoop flaw defect. Determining the maximum stress acting on the tube with a circumferential defect is essential to ensure the safe operation of the heat exchange system before the tube can be failure due to stress concentration at the local thinning.

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Xu, Bing Ye, Ying Hua Liu, Xian He Du, and Gang Chen. "Numerical Limit Load Analysis of Pipelines with Local Wall-Thinning." Key Engineering Materials 626 (August 2014): 482–88. http://dx.doi.org/10.4028/www.scientific.net/kem.626.482.

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Local wall-thinning, which can be found frequently on the surfaces of pipelines, may not only reduce the load-carrying capacities of pipelines, but also cause serious industrial accidents. In this paper, through a large number of computational examples, the effects of axial, circumferential, small area and large area local wall-thinning with different sizes on load-carrying capacities and failure modes of pipelines under both internal pressure and bending moment were investigated and evaluated. By data fitting, an engineering computational formula for plastic limit loads of pipelines with loca

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Xue, Ji Lin, Chang Yu Zhou, and Jian Peng. "Creep Stress Analyses Affected by Load Properties on P91 Pipe with Local Wall Thinning under High Temperature." Materials Science Forum 704-705 (December 2011): 1304–9. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.1304.

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The local wall thinning defect is very normal on pipes in power plants, which may result in stress redistribution of the pipes during the service process at elevated temperature. For the purpose of understanding the stress redistribution and strain accumulation of pipes with local wall thinning affected by load properties under creep condition, three groups of models were calculated, using three-dimensional elastic-plastic finite element analyses (FEA) based on FEA codes ABAQUS. In this study, the pipes has an identical defect of local wall thinning, the load properties and values are changed.

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Park, Jong Ho, Joon Hyun Lee, Gyeong Chul Seo, and Sang Woo Choi. "Application of Laser-Generated Ultrasound for Evaluation of Thickness Reduction in Carbon Steel Pipes." Key Engineering Materials 321-323 (October 2006): 743–46. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.743.

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In carbon steel pipes of nuclear power plants, local wall thinning may result from erosion-corrosion or flow-accelerated corrosion(FAC) damage. Local wall thinning is one of the major causes for the structural fracture of these pipes. Therefore, assessment of local wall thinning due to corrosion is an important issue in nondestructive evaluation for the integrity of nuclear power plants. In this study, laser-generated ultrasound technique was employed to evaluate local wall thinning due to corrosion. Guided waves were generated in the thermoelastic regime using a Q-switched pulsed Nd:YAG laser

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Nakagawa, Yuki, Ken-Ichiro Mori, and Tomoyoshi Maeno. "Prevention of Local Thinning and Springback in Hot Stamping of Thin Sheets." Key Engineering Materials 716 (October 2016): 487–93. http://dx.doi.org/10.4028/www.scientific.net/kem.716.487.

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In hot stamping of thin quenchable steel sheet, local thinning, springback and hardness of stamped parts were investigated. The sheets having 0.6, 1.0 and 1.6 mm in thickness were heated at 900 °C by a furnace and hot-stamped into a hat shape. Local thinning around the bottom corner of the hat-shaped part for a thickness of 0.6 mm was considerably remarkable in comparison with those above 1.0 mm in thickness. Local thinning was relieved for a transfer time of 15 s from the furnace because of the uniformity of the temperature distribution. In addition, the springback was prevented above 5s.

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Rehman, Noor, Asif Latif, Malik Muhammad Hashim, et al. "Fruit Thinning Enhances Yield and Quality of Local Apple Fruit (Malus domestica Borkhausen) var. Gaja in Pakistan." Philippine Agricultural Scientist 103, no. 1 (2020): 66–72. https://doi.org/10.62550/db30049019.

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The apple tree usually has heavy fruit set but to improve the individual fruit size, apple growers reduce the number of fruits by thinning. The present study was carried out to assess yield and quality of apple fruit as influenced by fruit thinning. The experiment was carried out in a randomized complete block design (RCBD), with two factors, viz. time of thinning (factor 1) and amount of thinning (factor 2). Factor 1 included thinning after 2 wk of fruit set and 4 wk after fruit set; Factor 2 included one fruit per cluster, two fruits per cluster, three fruits per cluster, and four fruits per

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Rozprawy doktorskie na temat "Local thinning"

Qadir, Manzoor. "Stress and fatigue analysis of pressurised vessel-nozzle intersections with and without local wall thinning." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27648.

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Pressure vessel and piping systems are essential components of all power plants. After long-term service, metallic components in plants will experience wear, leading to wall thinning. Severe thinning will affect the structural integrity, and thus a capability is required to assess the thinned components. The greatest weakening is normally near the intersection of two components. In this work, the finite element method is used to determine the remaining structural capacity of components which have been subjected to local wall thinning. The work is divided into two main parts; a stress analysis

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Gabelle, Jean-christophe. "Analyse locale et globale de l'hydrodynamique et du transfert de matière dans des fluides à rhéologie complexe caractéristiques des milieux de fermentation." Thesis, Toulouse, INSA, 2012. http://www.theses.fr/2012ISAT0023/document.

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La production d’éthanol à partir de biomasse lignocellulosique est reconnue comme une des voies possibles de réduction des émissions de gaz à effet de serre et de remplacement partiel des énergies fossiles. Pour être compétitif, la production d'enzymes à bas coûts est nécessaire. Ces enzymes sont produites par le champignon filamenteux Trichoderma reesei, qui présente, à forte concentration, un comportement fortement rhéofluidifiant pouvant entrainer des limitations de mélange et de transfert de matière lors du changement d'échelle. Dans ce travail, il est proposé de compléter les données de l

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Części książek na temat "Local thinning"

Liu, Zhi-Yong, Kai-Chun Chiu, and Lei Xu. "Local PCA for Strip Line Detection and Thinning." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45063-4_2.

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Kim, Kyoung Min, Buhm Lee, Nam Sup Choi, Gwan Hee Kang, Joong Jo Park, and Ching Y. Suen. "Gray-Scale Thinning Algorithm Using Local Min/Max Operations." In Document Analysis Systems VII. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11669487_6.

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Du, X., Y. Liu, and J. Zhang. "High Temperature Limit Analysis of Pressure Vessels and Piping with Local Wall-Thinning." In Advances in Direct Methods for Materials and Structures. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59810-9_12.

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Kim, Jong Hyun, Joong Hyuk Ahn, Seok Pyo Hong, Yun Jae Kim, and Chi Yong Park. "Effect of Local Wall Thinning on Maximum Load Carrying Capacities of Elbows under Bending." In The Mechanical Behavior of Materials X. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.517.

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Ahn, Seok Hwan, Kum Cheol Seok, and Ki Woo Nam. "A Study on Experimental Evaluation for Fracture Behavior of Carbon Steel Pipes for High Pressure Service with Local Wall Thinning." In The Mechanical Behavior of Materials X. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.1349.

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Sun, Shanshan, Deqianga Zhou, Noritaka Yusa, and Haicheng Song. "An Eddy Current Method to Evaluate Local Wall Thinning of Carbon Steel Pipe." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2020. http://dx.doi.org/10.3233/saem200005.

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This paper proposes to evaluate the local wall thinning of carbon steel pipe using an eddy current method. Firstly, the feature signals are determined by correlation analysis of the signals and the wall thinning sizes. Subsequently, the models for estimating the residual wall thickness rt is constructed using Gaussian process regression (GPR). Finally, the applicability of the models to the evaluation of local wall thinning is verified by simulation and experiment.

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Cheng Weiying, Kamiyama Yoshinori, and Tsukada Keiji. "Magnetic Flux Leakage Testing for Defect Characterization." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2016. https://doi.org/10.3233/978-1-61499-639-2-126.

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As a further study on the low-level magnetized magnetic flux leakage testing, numerical simulations and measurements were conducted to investigate the influence of liftoff variation, applicability of the approach to local thinning and material characterization. The results showed that by magnetizing a test object to a low strength level and acquiring the weak magnetic flux leakage signals by a highly sensitive magneto-impedance sensor, local thinning and the change of magnetic property can be detected.

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Bag, Soumen. "A Nearest Opposite Contour Pixel Based Thinning Strategy for Character Images." In Advances in Multimedia and Interactive Technologies. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1025-3.ch006.

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Thinning of character images is a big challenge. Removal of strokes or deformities in thinning is a difficult problem. In this paper, we have proposed a nearest opposite contour pixel based thinning strategy used for performing skeletonization of printed and handwritten character images. In this method, we have used shape characteristics of text to get skeleton of nearly same as the true character shape. This approach helps to preserve the local features and true shape of the character images. The proposed algorithm produces one pixel-width thin skeleton. As a by-product of our thinning approa

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Yamamoto Toshihiro, Uchimoto Tetsuya, and Takagi Toshiyuki. "An ECT Probe with Widely Spaced Coils for Local Wall Thinning in Nuclear Power Plants." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-750-5-241.

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Currently, local wall thinning on the inner surface of a pipe is evaluated mostly by ultrasonic thickness measurement from the outer surface of the pipe in nuclear power plants in Japan. However, it has been pointed out that there are two major issues of this evaluation method. Firstly, this method is not able to evaluate local wall thinning from the top of a reinforcing plate that covers the outer surface of a pipe because this two-layer structure hinders the propagation of ultrasound. Secondly, because ultrasonic thickness measurement of a pipe wall is conducted at certain intervals on the o

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Xie Shejuan, Takagi Toshiyuki, Uchimoto Tetsuya, and Chen Zhenmao. "Quantitative Non-Destructive Testing of Local Wall Thinning Defect Based on an Efficient Simulator of Pulsed Eddy Current Testing Signals." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2012. https://doi.org/10.3233/978-1-60750-968-4-257.

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In this paper, an efficient numerical simulation solver for pulsed eddy current testing (PECT) signals was developed, and based on this the quantitative non-destructive testing of local wall thinning defect in pipes of nuclear power plants (NPPs) was conducted. First, a frequency domain summation method combined with interpolation strategy was proposed and implemented based on finite element method with edge element for the PECT simulation. Comparison of numerical results and experimental results verified the efficiency of the developed simulation solver for PECT signals. Second, a self-differ

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Streszczenia konferencji na temat "Local thinning"

Arlt, Norbert, Winfried Heimann, and Thomas Ladwein. "Performance of Nickel Alloy Weldments in a High Nitrogen Superaustenitic Stainless Steel in Oxidizing Chloride Environments." In CORROSION 1991. NACE International, 1991. https://doi.org/10.5006/c1991-91198.

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Abstract The corrosion behaviour of nickel-base alloys and high alloyed stainless steels was investigated in the unwelded and welded state in a simulated chlorine dioxide bleached pulp washer environment. Laboratory tests were performed under electro-chemical control as well as in a solution with a defined ClO2-concentration at free corrosion potential. Nickel-base alloys in unwelded condition were prone to general thinning. Stainless steels with a very high resistance to pitting and crevice corrosion behaved quite sufficient. Nickel base alloys welded either autogenously or with nickel base f

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Nasrazadani, S., A. Bastola, and N. Gupta. "Flow Accelerated Corrosion of Welded Small Bore a106 Carbon Steel Pipe." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05980.

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Abstract Horseshoe pit formation and wall thinning due to flow-accelerated corrosion of high-pressure turbine extraction pipes was studied in this investigation. The corroded pipes from extraction line of a power plant show extensive pitting in the vicinity of socket-welded joints. Pitted surfaces were characterized for damaged surface morphology and pits distribution. Corroded pipes experienced severe pitting in flow downstream in the vicinity of weld joints where decrease in local pit size and increase in pit density were observed at locations a way from the weld joints.

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Onuki, Shoma, and Masaki Mitsuya. "Simplified Method for Seismic Assessment of Buried Pipeline With Local Wall Thinning." In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-105706.

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Abstract This study proposed a seismic assessment formula for pipes with wall thinning subjected to cyclic axial loading assuming seismic motion. Cyclic loading experiments using pipes with wall thinning were conducted to study the deformation and failure behavior. Two deformation modes were observed: buckling and bending deformations at the point of wall thinning. In the buckling mode, the buckling deformation at wall thinning progressed in accordance with the number of cyclic loading; finally, plastic instability occurred due to elephant foot buckling at full pipe cross-section. In the bendi

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Peng, Jian, Changyu Zhou, and Qiao Dai. "Interaction and Assessment of Multiple Local Wall Thinning Defects." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97110.

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The safety assessment of pipes with multiple local wall thinning defects (LWTs) is systematically investigated by finite element analyses (FEA) with special attention to the interaction of multiple LWTs. It is interesting that the arrangement of LWTs (axial arrangement and circumferential arrangement), the load condition (pure pressure, pure bending and complicated load) and the relative depth play important roles in the interaction of multiple LWTs. The effective stress area and critical stress can be used to explain their influences. Moreover, existing assessment methods of multiple LWTs in

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Morita, Ryo, Fumio Inada, Michiya Sakai, Shin-ichi Matsuura, Shigenobu Onishi, and Mitsuo Kugimoto. "Evaluation of Local Thinning Shape by LDI for Seismic Safety Evaluation of Piping System." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57318.

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For seismic safety evaluation of piping system with local thinning surface by liquid droplet impingement erosion (LDI), hybrid seismic tests were conducted to the piping with a locally-thinned elbow. In this paper, a method for predicting the thinning shape by LDI on the elbow is developed. To determine the thinning shape by LDI, droplet behavior at the elbow is calculated for various flow conditions and geometries. With the calculation of the collision point and velocity for each droplet, collision frequency and average collision velocity on the elbow are estimated. Then, the thinning shape o

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Urabe, Yoshio, Koji Takahashi, and Kotoji Ando. "Low Cycle Fatigue Behavior and Seismic Assessment for Elbow Pipe Having Local Wall Thinning." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25612.

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One of the concerned technical issues in the nuclear piping under operation is pipe wall thinning caused by flow accelerated corrosion. Recently it has been reported that the elbow section is more suspicious on pipe wall thinning by erosion-corrosion. Some researchers including authors have been studied static and fatigue strength of elbows with local wall thinning. However, still more experiment and analysis data are needed to clarify the technical issues. Accordingly, further experiments and their evaluations were carried out by the authors. This paper presents the influences of size and loc

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Kim, Jin Weon, and Chi Yong Park. "An Experimental Study on the Evaluation of Failure Behavior of Pipe With Local Wall Thinning." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1258.

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The pipe failure tests were performed using 102mm-Sch.80 carbon steel pipe with various simulated local wall thinning defects, in the present study, to investigate the failure behavior of pipe thinned by flow accelerated corrosion (FAC). The failure mode, load carrying capacity, and deformation ability were analyzed from the results of experiments conducted under loading conditions of 4-point bending and internal pressure. A failure mode of pipe with a defect depended on the magnitude of internal pressure and axial thinning length as well as stress type and thinning depth and circumferential a

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Inoue, Ken, Koji Takahashi, Kotoji Ando, Seok Hwan Ahn, Ki Woo Nam, and Kunio Hasegawa. "Finite Element Analysis on the Failure Behavior of Straight Pipe With Wall Thinning." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2718.

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Monotonic four-point bending tests were conducted using straight pipe specimens 102 mm in diameter with local wall thinning in order to investigate the effects of the depth, shape, and location of wall thinning on the deformation and failure behavior of pipes. The local wall thinning simulated erosion/corrosion metal loss. The deformation and fracture behavior of the straight pipes with local wall thinning was compared with that of non wall-thinning pipes. The failure modes were classified as local buckling, ovalization, or crack initiation depending on the depth, shape, and location of the lo

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Kim, Jong-Hyun, Chang-Sik Oh, Joon-Hyuk Ahn, et al. "Finite Element Based Plastic Loads for Elbows With Local Wall Thinning." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26219.

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Based on systematic three-dimensional (3-D), large strain FE limit analyses using elastic-perfectly plastic materials, this paper quantifies the effect of local wall thinning on plastic behaviors and TES (twice-elastic-slope) plastic loads for 90° elbows under in-plane bending. The thinning geometry is assumed to be rectangular rather than circular, but the nonlinear geometry effect is fully considered. Results from systematic analyses lead to simple approximations for TES plastic loads, covering a wide range of elbow and thinning geometries.

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Takahashi, Koji, Satoshi Tsunoi, Takumi Hara, et al. "Low Cycle Fatigue Behavior of Elbow Pipe With Local Wall Thinning." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61427.

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Low cycle fatigue tests were conducted using 100A elbow specimens with local wall thinning. Local wall thinning of 50% of the nominal pipe wall thickness was machined on the inside of elbow in order to simulate erosion/corrosion metal loss. The local wall thinning areas are located at three different areas, called extrados, crown and intrados. The elbow specimens were subjected to cyclic in-plane bending under displacement control without internal pressure. When the local wall thinning was located at intrados, fatigue life was the shortest. In addition, three-dimensional elastic-plastic analys

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Raporty organizacyjne na temat "Local thinning"

Newton, B. Talon, Ethan Mamer, Peter ReVelle, and Hector Garduno. Sacramento Mountains Watershed Study - The effects of tree thinning on the local hydrologic system. New Mexico Bureau of Geology and Mineral Resources, 2015. http://dx.doi.org/10.58799/ofr-576.

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Krivoi, Kallmeyer, and Baranyak. L52199 Nopig Metal-Loss Detection System for Non-Piggable-Pipelines. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0011343.

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This project investigated and upgraded the digital filtering used to interpret NoPig displacement data. This upgrade should allow the system to be used on long seam welded pipes. Limited laboratory testing was performed to show the improvement on ERW pipe. The NoPig method is a non-destructive testing method for unpiggable pipelines which uses above ground measurements for detecting and sizing wall thickness anomalies like corrosion. The method uses an applied current containing several distinct frequencies between two points on a pipeline up to 1 km apart. The resultant magnetic field is meas

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Leis, Brian, Xian-Kui Zhu, and Tom McGaughy. PR-185-133739-R01 Quantifying Re-Rounding in Pipeline Damage Severity Models. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011479.

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The objective of this work was to quantify re-rounding effects on mechanically damaged pipelines. This was done to determine if curvature suffices to identify where the effects of re-rounding are localized. It also was done to establish a framework that could be calibrated through subsequent analysis as an input to guidelines for damage severity assessment. Recognizing the expanding role of ILI and related in-the-ditch evaluation tools to help size and characterize damage, brief consideration was also given to ongoing work within the PRCI Nondestructive Evaluation (NDE) Program. This was done

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Chauhan, Vinod. L52307 Remaining Strength of Corroded Pipe Under Secondary Biaxial Loading. Pipeline Research Council International, Inc. (PRCI), 2009. http://dx.doi.org/10.55274/r0010175.

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Corrosion metal-loss is one of the major damage mechanisms to transmission pipelines worldwide. Several methods have been developed for assessment of corrosion defects, such as ASME B31G, RSTRENG and LPC. These methods were derived based on experimental tests and theoretical/numerical studies of the failure behavior of corroded pipelines subjected only to internal pressure loading. In the vast majority of cases, internal pressure loading will be the main loading mechanism on the pipeline. However, there may be instances when pipelines could also be subjected to significant loading from the env

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