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| 1 | Numerical Investigation of Penetration in Ceramic/Aluminum Targets Using Smoothed Particle Hydrodynamics Method and Presenting a Modified Analytical Model显示文摘Radius of ceramic cone can largely contribute into final solution of analytic models of penetration into ceramic/metal targets.In the present research,a modified model based on radius of ceramic cone was presented for ceramic/aluminum targets.In order to investigate and evaluate accuracy of the presented analytic model,obtained results were compared against the results of the Florence’s analytic model and also against numerical modeling results.The phenomenon of impact onto ceramic/aluminum composites were modeled using smoothed particle hydrodynamics(SPH)implemented utilizing ABAQUS Software.Results indicated that,with increasing initial velocity and ceramic thickness and decreasing support layer thickness,the radius of ceramic cone decreases;this ends up increasing residual velocity of the projectile and penetration time and extending the area across which the pressure is distributed.These findings indicate enhanced levels of target energy absorption and the required energy for bending and tensioning the target.As such,it can be observed that,at the same thickness and areal density,the ceramic target has its efficiency enhanced with increasing ceramic thickness and decreasing the support layer thickness.Finally,the results revealed that the associated data with SPH confirm the modified analytic model at higher accuracy than the Florence’s analytic model. | Ehsan Hedayati Mohammad Vahedi | 2017 | Computer Modeling in Engineering & Sciences2017，，3： | 8 |
| 2 | 鸟撞过程中撞击位置与撞击姿态对风扇叶片损伤影响研究显示文摘为研究鸟撞风扇叶片过程中撞击位置及撞击姿态对风扇叶片瞬态冲击响应的影响,通过CT扫描建立光滑粒子流体动力学(smooth particle hydrodynamics,SPH)绿头鸭模型,根据相对速度原则对五个撞击位置和十五种撞击姿态的旋转风扇-鸟体撞击过程进行模拟。获得了撞击位置及撞击姿态对叶片不同位置应力响应及位移响应的影响规律。结果表明:在鸟撞叶片过程中叶片前后叶根以及前后缘易发生应力集中,在撞击过程中该区域最易发生损伤变形,且前叶根要比后叶根受到的应力更大,更易发生损伤变形;鸟撞击2/6叶高位置时,叶片受到的撞击力、叶根处及前缘处应力最大;Y-135°、Y-270°、Y-315°、Z-135°及Z-315°撞击姿态下前叶根受到的等效应力最大,Z-135°撞击姿态下后叶根受到的等效应力最大,Y-270°撞击姿态下前缘接触处位移最大。研究结果对航空发动机风扇叶片抗鸟撞设计及适航评估具有参考价值。 | 郭鹏 刘志远 张桂昌 Reza Hedayati 张俊红 | 2021 | 振动与冲击2021，40，12： | 6 |
| 3 | Effects of different periods of renal ischemia on liver as a remote organ显示文摘AIM:To assess the hepatic changes after induction of different periods of renal ischemia. METHODS:Rats were subjected to either sham operation or ischemia (30,45 and 60 min) followed by 60 min reperfusion. Liver and renal functional indices were measured. Hepatic glutathione (GSH) and ferric reducing antioxidant power levels and the concentration of interleukin (IL)-10 and tumor necrosis factor (TNF-α) were evaluated. Portions of liver and kidney tissues were fixed for histological evaluation. RESULTS:Forty-five minutes renal ischemia followed by 60 min reperfusion caused significant changes in liver structure and a significant reduction in renalfunction. These rats showed a significant decrease in liver GSH,as well as a significant increase in TNF-α and IL-10 concentrations. These results demonstrated that renal ischemia caused changes in liver histology,function,oxidative stress and inflammatory status,which led to a reduction in hepatic antioxidant capacity. With 30 min ischemia,the magnitude of these changes was less than those with 45 or 60 min ischemia.CONCLUSION:A minimum of 45 min ischemia is needed to study the effects of renal injury on the liver as a remote organ. | Mehri Kadkhodaee Fereshteh Golab Maryam Zahmatkesh Rana Ghaznavi Mehdi Hedayati Hossein Ali Arab Seyed Naser Ostad Manoocher Soleimani | 2009 | World Journal of Gastroenterology2009，15，9： | 5 |
| 4 | 撞击位置与风扇转速对鸟撞过程的影响显示文摘鸟撞航空发动机风扇叶片严重威胁航空发动机的运行安全.对绿头鸭进行CT扫描,通过光滑粒子流体动力学(SPH)法建立绿头鸭真实鸟模型.将真实鸟模型及传统鸟体简化模型撞击平板仿真结果与Wilbeck真实鸟撞击平板试验结果对比,验证了真实鸟模型的准确性.对比分析了鸟撞静止风扇叶片与鸟撞旋转风扇叶片条件下鸟体及风扇叶片的瞬态冲击响应;选取836 r/min、1984 r/min、3344 r/min及3772 r/min 4个典型风扇转速研究了风扇转速对鸟撞过程的影响;分别选取1/6、2/6、3/6、4/6、5/6叶高位置为撞击位置,研究了撞击位置对鸟撞过程的影响.结果表明:叶片旋转对撞击过程中鸟体被切割块数、单个鸟块质量及受冲击叶片数量有直接影响,不考虑叶片旋转条件下的接触力、叶根应力、前缘应力等值明显低于考虑叶片旋转条件,使得对叶片应力及损伤预估偏保守,不利于叶片强度设计,因此在研究鸟撞过程中对叶片旋转运动应予以考虑.836 r/min转速下鸟体与叶片相互作用方式与其他转速有明显区别,836 r/min转速下鸟体动能减小,其他转速下鸟体动能增加,且鸟体动能增量随转速增大而增大;836 r/min转速下前缘应力峰值要大于1984 r/min转速,其他转速下,前缘应力峰值随转速增加而增大;接触力、叶根应力随转速的增大而增大.随撞击高度的增加,在撞击点相对速度及叶片扭转角共同作用下,接触力、鸟体动能增量、叶根应力峰值、鸟体动能、叶片前缘应力均呈先增大后减小趋势,撞击3/6叶高位置时前缘峰值应力及鸟体动能增量最大,撞击4/6叶高位置时叶根峰值应力及接触力最大. | 张俊红 刘志远 戴胡伟 Reza Hedayati 袁一 张桂昌 | 2020 | 天津大学学报(自然科学与工程技术版)2020，53，5： | 4 |
| 5 | Predicting the yield of pomegranate oil from supercritical extraction using artificial neural networks and an adaptive-network-based fuzzy inference system显示文摘 | J. Sargolzaei A. Hedayati Moghaddam | 2013 | Frontiers of Chemical Science and Engineering2013，7，3： | 2 |
| 6 | Dialysis-related carnitine disorder 显示文摘 | Hedayati SS | 2006 | Semin Dial2006，19，4： | 1 |
| 7 | A method for placement of DG units in distribution networks 显示文摘 | Hedayati H Nabaviniaki S A Akbarimajd A | 2008 | IEEE Transactions on Power Delivery2008，23，3： | 1 |
| 8 | AxiUary artery cannulation for cardiopulmonary bypass reduces cerebral micro- emboli 显示文摘 | Hedayati N Sherwood JT Schomish SJ | 2004 | J Thorac Cardiovasc Surg2004，，3： | 1 |
| 9 | A robust distributive approach to adaptive power and adaptive rate link scheduling in wireless mesh networks显示文摘 | Kian Hedayati Izhak Rubin | | 0，，01： | 1 |
| 10 | The clinical presentation and operative man-agememt of nodular and diffuse substernal thyroid disease显示文摘 | Hedayati N Mc Henry CR | 2002 | Am Surg2002，68，3： | 1 |
| 11 | Radiographic evaluation of the shoulder 显示文摘 | Goud A Segal D Hedayati P | 2008 | Eur J Radio2008，68，1： | 1 |
| 12 | Isolation,identification and multipotential differentiation of mouse adipose tissue-derived stem cells显示文摘 | Taha MF Hedayati V | | 0，，： | 1 |
| 13 | Review on transarterial chemoembolization in hepatocellular carcinoma: Palliative, combined, neoadjuvant, bridging, and symptomatic indications显示文摘 | Thomas J. Vogl Nagy N.N. Naguib Nour-Eldin A. Nour-Eldin Pramod Rao Alborz Hedayati Emami Stefan Zangos Mohamed Nabil Ahmed Abdelkader | 2008 | European Journal of Radiology2008，，3： | 1 |
| 14 | Axillary artery cannulation for cardiopulmonary bypass reduces cerebral microemboli显示文摘 | Sherwood JT Schomisch SJ | 2004 | J Thorac Cardiovasc Surg2004，128，3： | 1 |
| 15 | Nonplanar fracture propagation from a horizontal wellbore: experimental study显示文摘 | Abass H H Hedayati S Meadows D L | 1996 | Old Production dr Facilities1996，11，3： | 1 |
| 16 | Ball milling preparation and characterization of poly (ether ether ketone)/surface modified silica nanocomposite显示文摘 | HEDAYATI M SALEHI M BAGHERI R | 2011 | Powder Technology2011，207，1： | 1 |
| 17 | Application of fuzzy sets and fuzzy soft sets in hypermodules 显示文摘 | AMERI R NOROUZI M HEDAYATI H | 2013 | RACSAM2013，107，2： | 1 |
| 18 | Effect of zinc supplementation on triglyceride, cholesterol, LDL, and HDL levels in zinc-deficient hemodialysis patients显示文摘 | Roozbeh J Hedayati P Sagheb MM | 2009 | Ren Fail2009，31，9： | 1 |
| 19 | A method for placement of DG units in distribution networks显示文摘 | Hedayati H Nabaviniaki SA Akbarimajd A | 2008 | IEEE Transactions on Power Systems2008，23，3： | 1 |
| 20 | Death or hospitalization of patients on chronic hemodialysis is associated with a physician-based diagnosis of depres- sion显示文摘 | Hedayati SS Bosworth HB Briley LP | 2008 | Kidney Int2008，74，： | 1 |
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