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| 1 | Numerical Analysis of Deteriorated Sub-sea Pipelines under Environmental Loads显示文摘The significant point is the bidirectional interaction technique in FSI analysis while investigating subsea corrosion effect. By this way, pipe environment is accurately modelled and fluid effects are also considered. The effect of external corrosion defects on structural behaviour of a pipeline is studied by creating a nonlinear numerical model based on the finite element method according to ABAQUS analysis program. Corrosion losses of sections are obtained from experimental results and applied to the model. Numerical model is formed by a span of sub-sea pipeline that is subjected to environmental loads. Seismic and wind-generated irregular wave loads are considered as environmental loads. Irregular wave is represented with equivalent eight regular waves via FFT. The pipe is modelled according to two different types which are non-corroded(intact) and corroded(deteriorated) to demonstrate corrosion effects on it. The visible type of corrosion in marine environment is named ‘pitting' corrosion, in which the material loss is locally interpenetrated over the surface. By considering this situation, the corroded and non-corroded pipes are modelled as 3D solid elements. The main point is revealing how the subsea corrosion affects the structural behaviour of pipelines on the basis of implementation of experimental results to a model structure due to changes of stresses and displacement. | GüCüYEN Engin | 2015 | Chinese Journal of Mechanical Engineering2015，28，6： | 7 |
| 2 | A Study on 3D FE Simulation Method of NC Bending Process of Thin-walled Tube显示文摘The numerical control (NC) precision bending process of thin-walled tube is on e of advanced plastic forming processes with high efficiency, forming precision, strength/weight ratio and low cost, thus it is playing more and more important role in manufacturing parts in aerospace and automobile industries. However, the determination of parameters crucial to make sure tube parts qualified is heavil y experience-based and involves repeated trial-and-errors in practice, which makes the production efficiency reduce drastically and does not fulfill the deve lopment of high technology. With quick development of computer technology and gr adual perfect of plastic forming theory, computer numerical simulation based on finite element method (FEM) has become one of important tools of researching and developing plastic forming technology. Development trend of NC precision bendin g process of tube is simulating its forming process by FEM. Because NC tube bend ing is of 3D nature, it is of great importance to analyze the forming mechanism and find out the influence law of forming parameters on forming process in the N C precision bending process of thin-walled tube quantitatively by 3D FE simulat ion. Based on the rigid-plastic finite element method (FEM) principle, a 3-dimens ional (3D) rigid-plastic FE simulation system named TBS -3D (tube bending simu lation by 3D FEM) for the NC bending process of thin-walled tube has been devel oped, a reasonable FEM model has been established. By use of this FEM simulation system, a NC bending process of thin-walled has been simulated. And deformed m eshes under different bending stages, stress distribution along bending directio n, relationship between maximal wall thickness changing ratio and bending angle have been obtained. And then some forming laws of NC tube bending obtained are a s follows: (1) NC bending process make tube elongate to some extent; (2) Charact eristic of stress distribution is that the outer area is undergoing tensile stre ss, the inner area is undergoing compression stress, and stress neutral layer mo ves close to the inner area, which is in good accordance with the practice; (3) Maximal wall thinning ratio in the outer tensile area changes only a little with increase of bending angle, and maximal wall thickening ratio in the inner compr ession area increases linearly with bending angle. The above results show that 3 D FE simulation is an important and valid tool of analyzing NC bending process o f tube, this research is beneficial for the practical tube bending process, and it may serve as a significant guide to the practice of the relevant processes. | ZHAN Mei 1, YANG He 1, JIANG Zhi-qiang 2, ZHAO Zhen-son g 1, LIN Yan 1 (1. College of Materials Science and Engineering, Northwestern Polytech nical University, Xi’an 710072, China 2. Xi’an Heavy Machinery Research Institute, Xi’an 71003 2, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 3 |
| 3 | Injection molding of micro-porous titanium alloy with space holder technique显示文摘The powder space holder(PSH) and powder injection molding(PIM) methods have an industrial competitive advantage because they are capable of the net-shape production of micro-sized porous parts.In this study,micro-porous Ti6Al4V alloy(Ti64) parts were produced by the PSH-PIM process.Ti64 alloy powder and spherical polymethylmethacrylate(PMMA) particles were used as a space holder material.After molding,binder debinding was performed by thermal method under inert gas.Debinded samples were sintered at 1250oC for 60 min in a vacuum(10-4 Pa) .Metallographic studies were conducted to determine densification and the corresponding microstructural changes.The surface of sintered samples was examined by SEM.The compressive stress and elastic modulus of the micro-porous Ti64 samples were de-termined.The effects of fraction of PMMA on the properties of sintered micro-porous Ti64 alloy samples were investigated.It was shown that the fraction of PMMA could be controlled to affect the properties of the Ti alloy. | Gülsah Engin Bülent Aydemir H.zkan Gülsoy | 2011 | Rare Metals2011，30，6： | 3 |
| 4 | A Mathematical Model on Vacuum Chamber of a Multifunctional RH-degasser显示文摘A 3D-mathematical model was developed for the simulation of gas flow, combustion and heat convection in RH vacuum chamber. Under different conditions, the influences of the Kawasaki Oxygen Top Blowing system (KTB) on the gas flow, chemical reactions and temperature distributions were calculated based on the model. The optimum position of the lance is suggested for the RHKTB degassing process. | Yisheng Chen, Youduo He, Daqiang Cang, Zongze Huang 1) Institute of Metallurgical Engineering, UIST, Baotou 014010, China 2) Metallurgy School, University of Science and Technology Beijing. Beijing 100083. China 3) Technical Centre, Baoshan Iron & steel G | 2001 | Journal of University of Science and Technology Beijing2001，8，4： | 2 |
| 5 | THREE-DIMENSIONAL MODELLING OF HYDRODYNAMICS AND WATER QUALITY IN COASTAL WATERS显示文摘THREE-DIMENSIONALMODELLINGOFHYDRODYNAMICSANDWATERQUALITYINCOASTALWATERS￥ShenYong-ming(DepartmentofCivilEngineering,DalianUniv... | Shen Yong-ming(Department of Civil Engineering, Dalian University of Technology, Dalian 116023,P.R.China)Darryl G Murphy(Environmental Studies, Hydraulics Research Wallingford Ltd, Wallingford,Oxfordshire, OX10 8BA,U.K.) ) | 1995 | Journal of Hydrodynamics1995，7，3： | 2 |
| 6 | Imaging of extrapulmonary tuberculosis 显示文摘 | Engin G Acunas B Acunas G | 2000 | Radiographics2000，20，2： | 1 |
| 7 | Combined cyclectomy-trabeculectomy procedure for refractory glaucoma显示文摘 | Engin G Yilmazli C Engin KN | 2004 | Ophthalmic Surg Lasers Imaging2004，35，6： | 1 |
| 8 | Respirometric kinetic parameter calculations of a batch jet loop bioreactor treating leachate and oxygen uptake rate estimation by DTM显示文摘 | Ince M Yildiz F Engin G O | 2008 | Journal of Hazardous Materials2008，153，3： | 1 |
| 9 | Ammonia and urea excretion rates of juvenile Australian short-finned eel (Anguilla australis australis) as influenced by dietary protein level显示文摘 | Engin K Carter C G | 2001 | Aquaculture2001，194，12： | 1 |
| 10 | Imaging of extrapulmonary tuberculosis显示文摘 | Engin G Acunas B Acunas G | 2000 | Radiographics2000，20，2： | 1 |
| 11 | Revised slope loss equation 显示文摘 | McCool D steepness K Brown factor for Transactions of the Biological Engineers L C Foster G R the universal soil American Society | 1987 | of Agricultural and1987，30，5： | 1 |
| 12 | Anger and alexithymic characteristics of the patients diagnosed with insomnia:a control group study显示文摘 | Engin E Keskin G Dulgerler S | 2010 | J Psychiatr Ment Health Nurs2010，17，8： | 1 |
| 13 | Gastrointestinal lymphoma: a spectmm of fluoroscopic and CT findings 显示文摘 | Engin G Kommn U | 2011 | Diagn Interv Radiol2011，17，3： | 1 |
| 14 | Arsenic related hearing loss in miners显示文摘 | Gülin G?k?en Kesici ?lhan ünlü Arzu Ba?türk Top?u Ceylan Demir Bal Engin Tutkun ?mer H?n? Y?lmaz | 2016 | American Journal of Otolaryngology--Head and Neck2016，，1： | 1 |
| 15 | Fish meal replacement by plant and an- imal by - products in diets for the Australian short - finnedeel, Anguilla australis australis (Richardson) 显示文摘 | Engin K Carter C G | 2005 | Aquaculture Research2005，36，5： | 1 |
| 16 | Transscleral fixation of a single - piece hydrophilic foldable acrylic in- traocalar lens 显示文摘 | Taskap ih M Gulkilik G Engin G | 2007 | Can J Ophthalmol2007，42，2： | 1 |
| 17 | US versus conventional radiography in the diagnosis of sternal fractures显示文摘 | Engin G Yekeler E Guloglu R | 2000 | Actu Radiol2000，41，3： | 1 |
| 18 | Precancerous lesions of oral mucosa显示文摘 | Yardimci G Kutlubay Z Engin B | 2014 | World J Clin Cases2014，12，12： | 1 |
| 19 | Restoring endoplasmic reticulum function by chemical chaperones: an emerging therapeutic approach for metabolic diseases显示文摘 | Engin F Hotamisligil G S | 2010 | Diabetes Obes Metab2010，122，： | 1 |
| 20 | Intractable epistaxis related to cavernous carotid artery pseudoaneurysm : treatment of a case with covered stent 显示文摘 | Celil G Engin D Orhan G | 2004 | Auris Nasus Larynx2004，31，3： | 1 |
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