最大切應變 的英文怎麼說
中文拼音 [zuìdàqiēyīngbiàn]
最大切應變
英文
maximum shear strain-
3. on the present deformation condition, the cementite in pearlitic steel has more severe plastic deformation capability t - he max shear strain up to 1. 9. 4
C方式ecap變形條件使珠光體鋼65mn中的滲碳體可以表現出很強的塑性變形能力? ?觀察到的最大切變形達到1 . 9的等效真應變。Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義Relating closely to the main problem of the high sidewall and wide span underground cavities excavation stability of xiluodu hydroelectric project, the evolution characters of geo - stress field in deep - cutting gorge and the whole features of the stress field, strain field and plastic failure zone around the underground chambers after excavation are studied systematically in the dissertation, based on a great deal of data gathered in field investigation and taking the flac3d v2. 0 software as basic computation tools. meanwhile, in the course of research, the new methods of dynamic numerical simulation are summarized and applied. furthermore, the effects of rock mass qualities, initial geo - stress field and excavation procedure on surrounding rock mass stability are discussed
本文緊密結合溪洛渡水電工程大跨度、高邊墻復雜地下廠房洞室群，施工開挖過程中和開挖后圍巖穩定性研究這一重大課題，在詳盡的野外地質調查工作和對大量基礎地質資料的整理與分析基礎上，以目前國際工程地質界公認的最新通用軟體flac ~ （ 3d ） 2 . 0版作為基本計算工具，從整個壩區地應力場的研究開始，通過動態數值模擬分析這一新的模擬思路，系統地研究了深切峽谷區地應力場多階段的特徵和演變規律，進而對左、右岸地下廠房洞室群開挖全過程中圍巖應力場、變形場和塑性破壞區的變化特徵，進行了全過程動態數值模擬研究，並詳細討論了圍巖質量、初始地應力場、施工開挖順序對大型地下洞室群圍巖穩定性的影響。The principal stress value arised alteration, the magnitude of stress closed to 25 ~ 32mpa, its influence scope was within the scope outside of tunnel opening 10 ~ 15 meter, maximum tense focused at vault and middle of floor about half meter. shearing stress focused at corner of vault and wall, always been sheared
主應力量值也發生了較大改變，壓應力可達25 32mpa ，其影響范圍在隧道邊墻外10 15m ；拉應力集中在拱頂和底板中部約0 . 5m范圍內，最大可達10mpa ；在拱腰和墻腳常為剪應力集中區，易發生塑性剪切破壞。On the base of milling ball interaction during milling process, the powder height of each collision can be calculated. if the impact of milling ball takes as hertz elastic collision, the maximum real strain and the maximum tangential strain are obtained as follows, e, . , ln [ h, / ( h0 ? vrcos6 / 2 ) ] = vrsin6 / h0 ? / q, t2rt2 / 2om ~ h, j where s, p, v are maximum real strain, the maximum tangential strain, friction coefficient and the velocity of milling ball
對球磨過程中磨球相互作用作了一些假設后，可以計算出每次碰撞所獲得粉末體高度值；將磨球的碰撞作為hertz彈性碰撞，碰撞時的速度分解為法向速度和切向速度得出粉末的最大真應變和最大切應變為湖南大學材料物理與化學專業碩士論文r 。The dynamic parameters of the asphalt concrete can be obtained through dynamic triaxial test, combined with the cunli chen ' s studying results, discovering that the dynamic stress - strain relationship obeys the hyperbolic model well, and t he maximum dynamic modulus edmax and the maximum shear modulus gdmax increasing along with the decreasing of the temperature and the increasing of consolidation ratio kc
通過振動三軸試驗獲得瀝青混凝土材料的動力參數，並結合西安理工大學陳存禮老師的研究成果。發現動應力與動應變的關系較好地符合雙曲線規律，最大動模量e _ （ dmax ）和最大剪切模量g _ （ dmax ）隨著溫度的降低、圍壓和固結比kc的增大而增大。When a ferromagnetism items is under the application of stress, the phenomenon that the tangential component of magnetic leakage field has maximum value and that the normal component of magnetic leakage field changes polarity and acquires zero value at the stress concentration zone will take place
鐵磁性工件在受到應力作用時，在應力集中處會有漏磁場的切向分量出現最大值、同時法向分量改變符號且過零值點的現象。The static triaxial test of two engineerings shows that the breaking strength of asphalt concrete declines significantly as the temperature rises and the strain increases noticeably when breaking. increase in the asphalt content leads to decrease in tangent modulus and cohesion, but the internal friction angle tends to increase. increasing confining stress results in the augment of the maximum stress and the ultimate value of volumetric strain
兩個實際工程的靜三軸變形與強度試驗表明，隨著溫度升高瀝青混凝土破壞強度明顯降低，破壞時應變明顯加大；瀝青含量的增加會導致切線模量和凝聚力降低，但內摩擦角趨于增加；周圍壓力增大會導致最大應力_ d增大，其體變壓縮極限值也越大。Based on the continuous damage theory, considering the shear effect, the high - order shearing, flexural and in - plane deformation coupling model is built ; through the nonlinear fem analysis of rc beams strengthened with frp, the damage theory and damage course is researched ; compared with experiment results, it shows that the model is effective ; the fem analysis software is prepared to provide simple and effective method for the engineering application ; using the soft the frp strengthened beams before and after damage is modeled so as to provide the theory base for engineering application
摘要基於連續損傷理論，考慮膠層的剪切效應，建立frp加固鋼筋混凝土梁的高階剪切彎曲及面內變形耦合模型，編制了有限元分析的軟體，進行非線性有限元分析；通過與已有的試驗結果進行對比，證明該模型的簡單，有效性；利用該軟體對未加固混凝土梁，初始進行加固的混凝土梁以及最大拉應變達到極限值時進行加固的混凝土梁等幾種情況進行數值模擬。Statistically, it makes a quantitive analysis on the evolvement of the country economic structure in xi ' an city, the economic benefit of the changes in industry structure, the effect on labor resource collacation in industry structure and the effect of the increasing income of countrymen in industry structure changes, which discloses a rule of the industry structure evolvement in country. the putting forward of the non - agriculture industry in country, especially the rapid increase in country industry will promote the rise of the country industry level for a long term. the country industry structure influences a lot the increase of the farmer ' s income which is also affected by agriculture structure and planting structure, but less. the non - agriculture industry plays a main role in the increase of farmer ' s income. for the low level of the townlization and industrialization, developing industry, construction and commercial in country is very feasible to resolve the problem of spare labors in country. it is strengthening labors transferring and reducing the modulus of labor over the infield that farmers income could be kept increasing. after a theoretical analysis and twenty years practise in the regulation of country economy structure after the reform and opening policy in xi ' an, a new thought of regulating country economy structure in xi ' an is put forward that a strategic regulation must be taken in country economy structure and the agriculture structure must be optimized. moreover, an expanding agriculture must be developed and transfer the spare labors in country effectively. so the government function during the regulation of country economy structure is transferred to : the first one, making the stress policy in the regulation of country industry structure. 2ndly, strengthening the force in regulating country industry structure ; 3rdly, making a plan on the regulation of country industry structure ; 4th promoting the optimizition and upgree of industry relying on sci - tech progress ; 5th enhancing the townlization and optimizing the country industry structure ; last one, improving the quality of labors in full scale
本文在概述經濟結構理論的基礎上，第一次系統地研究了西安市農村經濟結構調整，用數據統計的方法，定量、定性地分析了西安市農村經濟結構演變的軌跡，分析了產業結構變動的經濟效益、產業結構勞動力資源配置效應、產業結構變動的農民收入增長效應，揭示了農村產業結構演變的規律。提出農村非農產業，尤其是高速增長的農村工業，對促進農村產業水平的提升起著長?推動力的作用；農民收入增長直接受農村產業結構的影響最大，農業產業結構、種植業結構對農民收入有影響，但作用不可高估；非農產業是農民增收的主要支撐力量，解決農村余勞動力在城鎮化、工業化水平不高的情況下，切實可行的選擇是在農村發展工業、建築業、商飲業等非農產業；農民收入要保持快速增長態勢必須加大農村勞動力轉移力度，減少耕地承載勞動力的系數。通過理論分析，結合西安市改革開放后20多年的農村產業結構調整的實踐，提出了西安市農村產業結構調整的發展思路及目標、原則，明確指出了政府在農村經濟結構調整過程中的職能轉變的重要方面：一是制定農村產業結構調整的傾斜政策，二是加大對農村產業調整的投入力度，三是制定產業結構調整的規劃，四是依靠科技進步促進產業優化和升級，五是加快城鎮化過程，優化農村產業結構。Author thinks that the direction of the maximum plastic distortion along a constant radius around the crack tip may be considered as the direction of shear - mode fracture ( named pmax - criterion ) and the load when located shear band prongs the ligament in the front of crack tip is regarded as the limited load of shear - mode fracture. ( 3 ) the fad ( fracture assessment diagram ) of titled crack is proposed based on achievements of mesomechanics about i - ii complex ductile fracture of metal, and the titled crack is classified two kinds : void - mode fracture is assessed by fracture assessment curve, and shear - mode fracture by limited load. ( 4 ) using a fe program based on plantle - ressue theory to calculate some mesomechanical parameters, a flange joint structure of a high pressure vessel ( design pressure 31. 4mpa and the thickness of the hemispherical head is half of that of shell. ) is analyzed to determine whether the structure under operation pressure is safe or not, forecast the mode of potential invalidation and argue for the rationality of design of the structure
試件的整體斷裂為剪切型，但在試件芯部裂尖鈍化區中部出現了韌窩型啟裂並有一定的擴展，說明局部較高的應力三軸度也會使韌窩型機制得以發展，但是不改變試件整體的剪切型斷裂模式；對韌性斷裂的剪切模式的細觀機理做了一定的探討，並且提出了含裂紋構件剪切型斷裂的宏觀判據：認為裂紋前方的集中剪切帶中與裂紋尖端等半徑處最大有效塑性應變出現的方向可以作為裂紋剪切斷裂的方向（可簡稱為_ （ pmax ）準則） ，集中剪切滑移帶貫穿裂紋前方承載韌帶時的載荷可以作為極限載荷；本文運用金屬韌性斷裂細觀力學在一復合型韌性斷裂方面的研究成果，採用失效評定圖的形式，提出了傾斜裂紋的安全性評定方法的基本框架。Rises but other parameters do n ' t almost vary. at of mrs based on composites is lower than that of mrs based on carbonyl iron, declines with the content of atpu increasing but the rising rate with h improves. with the content of spanso increasing, at declines, but the rising rate falls, and y max heightens
復合粒子的、 、隨著atpu用量的增加均降低，且頻散特性也有較大的變化，而隨著span80用量的增加，增加，其它參數基本不變；復合粒子組成的mrs的磁致剪切應力較羰基鐵粒子有很大的降低，隨atpu用量的增加降低，但隨h增加的速率提高，最高剪切速率_ （ max ）增加，而隨著span80用量的增加增加，但隨h增加的速率降低， _ （ max ）提加。In order to adapt the audit environment change, enhance the ability of the auditor to assess the risk and discover the fraud, in october, 2003, the international audit assurance standard board ( iaasb ) has carried on a series of significant revision to the present audit risk criterion. the great change and core conten of this revision has determined the new audit risk model, namely audit risk equals significant misstatement risk multiplying inspection risk. chinese institution of certified public accountant has rivised and issued new audit risk standard according to the the new international audit risk standard on february 15, 2006, at the same time begins to applying the new audit risk model, which helps to improve the auditor ’ ability to discover the significant misstatement of financial statement. therefore, the most urgent question needed to solve is to how to correctly understand and apply the model in the audit practice
為了適應審計環境的變化，從根本上提高審計人員評估風險和發現舞弊的能力， 2003年10月，國際審計與鑒證準則委員會（ iaasb ）對現行審計風險準則進行了一系列的重大修訂，本次修訂的最大變化和核心內容就是確定了新的審計風險模型，即審計風險=重大錯報風險檢查風險。中國注冊會計師協會根據國際審計和鑒證準則委員會發布的新的國際審計風險準則於2006年2月15日修訂和發布了我國新的審計風險準則，同時啟用新的審計風險模型，以提高注冊會計師發現財務報表重大錯報的能力。因此，在審計實務中如何正確理解和應用該模型成為當前我們迫切需要解決的問題。These results demonstrate that the effect of improving the bearing load of structure is very good by strengthening the member of eccentricity compression under pre - stress. the ultimate bearing capacity of strengthened column is closely related to the eccentricity distance. in the condition of eliminating the lagging strain of angle iron, the magnitude of pre - stress putting on the angle iron has litter impact on the ultimate bearing capacity of structure
偏心受力構件的有限元計算結果表明：預應力法加固偏心受力構件，其對結構承載力的提高效果顯著；加固柱的最大承載力與柱的偏心距有密切關系；在消除角鋼應變滯后的條件下，對角鋼施加預應力的大小對結構最終承載力無明顯影響。Based on the theory of fracture mechanics, the relation between the critical stress intensity factors for v - notch kc and the plane strain crack toughness k10c and the brittle fracture criterion of the maximum circumferential stress for single and double stress singularity with the v - notch problems are proposed. experiments were carried out using two kinds of v - notched specimens made out of plexiglas to verify this brittle fracture criterion
本文基於斷裂力學原理，推導出了型切口的臨界應力強度因子k _ c與材料的平面應變斷裂韌度k _ （ 10c ）之間的關系，給出了平面單奇異性和雙奇異性型切口問題的最大周向應力脆性斷裂準則，並用有機玻璃板材加工了兩種型切口試樣，進行了實驗驗證。The framework and results of this study is thus summarized as follows : 1. analyzing the effect of the nonlinear parameters on seismic response. so far the g / g _ max - ( transient dynamical shear modulus over the maximum shear modulus vs. shear strain ) and the - ( equivalent shear hysteretic damping ration vs. shear strain ) curves are widely employed in the experimental method in studying soil dynamic property, supposing under equiamplitude cyclic load
目前，人們利用實驗手段分析土體動力特性時給出的最基本的描述量是g g _ （ max ） ?曲線（等效動剪切模量與最大動剪切模量的比值隨應變幅值變化的曲線）及?曲線（等效剪切滯回阻尼比值隨應變幅值變化的曲線） 。We should not hold forth about transition until all the necessary political and economic conditions are present and until it is advantageous and not detrimental to the overwhelming majority of the people throughout china
不到具備了政治上經濟上一切應有的條件之時，不到轉變對于全國最大多數人民有利而不是不利之時，不應當輕易談轉變。Abstract : focused on the metal plastic forming of valve bodies for power plant boiler, a new process named “ shear extrusion ” is described in this paper. the numerical simulation analysis is carried out by using the 3 - d deform software to predict the distribution of velocity, stress, strain and temperature fields during the forming process and the flow law of metal. then the numerical simulation results are testified by simulative experiment. finally, large - size valve bodies have been successfully formed by the screw press
文摘:針對電站鍋爐用大型截止閥體的製造新工藝? 「剪切擠壓」 ，利用數值模擬的方法對剪擠工藝進行研究，得到了成形過程中速度、應力、應變及溫度場等的分佈及金屬流動規律，並通過物理模擬實驗進行了驗證，進而為獲得閥體剪擠製造的最佳成形工藝參數提供可靠依據。As an example, under the windshear conditions depicted in the figure below where there is a windshear event of 15kt at 3 mile final and a microburst event of 30kt at 1 mile final, the consolidated windshear alert based on the first encounter, maximum intensity principle will be
下圖例子顯示跑道進場3海里處出現了15海里小時風切變的事件，於1海里處同時出現- 30海里小時的微下擊暴流。根據"首次相遇位置最大強度"的準則，風切變預警應為：Second, on the base of large scale integer building model tests, anti - seismic property of structure of multi - rib panel is analyzed, and is contrasted with the property of the masonry structure. the research reveals that buildings in structure of multi - rib panel make shear deformation mainly, whose failure process is similar to the single composite panel and the tests result shows that, contracted to masonry structure, carrying capacity of buildings in this structure is 1. 5 times and deformation capacity is about 3 times. in addition, thanks to the lower self - weight, the seismic response of the buildings is far lower than masonry structure
研究表明：多層密肋壁板結構房屋以剪切變形為主，破壞過程與單塊墻板相似；復合墻板與后澆隱型框架連接成整體結構，協同工作；傳統的底部剪力法適用於本結構體系的抗震計算；試驗結果還表明，該結構房屋最大承載能力是磚混結構的1 . 5倍，變形能力是磚混結構的3倍左右，而房屋自重比砌體結構減少1 4以上，地震反應遠低於砌體結構。分享友人