裂紋容限 的英文怎麼說

中文拼音 [lièwénróngxiàn]
裂紋容限 英文
crack tolerance
  • 裂 : 裂動詞[方言] （東西的兩部分向兩旁分開） open
  • 紋 : 名詞（花紋; 紋縷兒） lines; veins; grain
  • 限 : Ⅰ名詞（指定的范圍; 限度） limit; bounds Ⅱ動詞（指定范圍, 不許超過） set a limit; limit; restrict
  1. The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks, detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack, a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading. the distributions of tz are minutely studied in the forward section of the cracks. strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions

    全文主要研究內容和學術貢獻如下: 1 .針對一般三維裂紋端部場應力約束準確解析的困難，對均勻拉伸載荷作用下各向同性彈性板中穿透厚度中心直裂紋、半橢圓表面裂紋和1 / 4橢圓角裂紋進行了大量詳細的全場應力三維有限元分析，首次全面分析了非穿透裂紋端部場三維影響區范圍，給出了不同形狀三維裂紋前沿離面應力約束因子tz的數值解，並結合k場平面解給出了非穿透裂紋端部應力場k - tz雙參數描述。
  2. This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development. its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror, analyze glass cutting principle, design specisl - use grinding wheel structure, select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid, look for the technological parameters such as the optimal acid concentration and etching time etc. ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and

    本論文的研究主要是瞄準國家高技術對大口徑輕型鏡的戰略需求而開展的。主要研究內容是：根據光學玻璃的物理與化學性能，選擇輕型鏡坯材料；用有限元法對鏡子的變形進行分析、計算，找出變形規律，優化設計400mm輕型平面鏡、 450mm輕型球面鏡鏡體結構；分析玻璃切削原理，設計專用磨輪結構，選擇合理工藝技術參數，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學玻璃機理，尋找最佳酸濃度、腐蝕作用時間等工藝參數，實現400mm平面鏡減重孔應力與微裂紋的消除；討論分離器加工原理和工藝技術特點，完成400mm平面輕型鏡面形加工。
  3. The following conclusions are gained : ( 1 ) the located shear band prongs the ligament near the top crack tip and the structure may occur shear - mode fracture at the angle of 155 ? to crack when load is 87. 92mpa ; the mode of fracture of the flange joint structure is not possible to be void - mode ; ( 2 ) it is proved that loading and then unloading repeatedly can not increase the possibility of invalidation of the structure when the times of loading and unloading are not too more when load is operating pressure ; the structure is safe when the vessel is operating ; ( 3 ) in the fe model of the thesis, not considering the influence of water pressure test which is in the process of fabrication of vessel in fe results in larger deviation in analysi

    得出了以下結論：在8792mpa的載荷下筒體一封頭連接結構處的集中剪切帶貫穿韌帶，可能發生沿與原裂紋線成155 「角方向剪切型斷裂；筒體一封頭連接結構不可能發生韌窩型斷裂； （ 2 ）在工作壓力下進行次數不多的反復加、卸載，結構不會破壞，也不會喪失安定性：結構在工作狀態下是安全的； m在本文的彈塑性有限元模擬計算中，對于裂紋尖端進行力學分析時，不考慮壓力容器製造過程中水壓試驗的影響，將導致計算結果出現較大的偏差； （ 4 ）筒體完全屈服時的載荷為92石3mpa ，封頭完全屈服時載荷為86
  4. Further more, the tic pinned at the tips of the crack and impeded the crack propagation

    此外，還有tic雜質顆粒對于裂紋的釘扎。材料具有一定的損傷容限。
  5. Then an integrated application program including some functional modules such as residual strength analysis, crack growth analysis, principle structure elements database management, material properties database management etc, with friendly interfaces and favorable windows styles, is developed by using these classes. finally all of the typical structures described in the " damage tolerance design handbook " have been analyzed

    在此基礎上研製了具有友好界面和良好windows風格的損傷容限分析與評定應用程序，並完成了《設計手冊》中給定的全部典型開裂結構的實例化，實現了對這些結構的裂紋擴展分析和剩餘強度分析。
  6. As it is difficult to obtain the accurate analytical solutions for the stress constraints of general 3d cracks, we have conducted systemically detailed researches on the out - of - plane stress constraint by finite elements ( fe ) and proposed a two - parameter description of non - through thickness 3d crack fields. several problems in damage tolerant design were also investigated based on continuum mechanics and probability theory

    三維應力約束對精確預測結構破壞不可缺少，因此，本文採用三維有限元等方法基於連續介質力學、概率論等理論，對典型三維裂紋尤其是非穿透裂紋系統深入地開展了三維應力約束理論計算、三維裂紋端部應力場描述以及結構三維損傷容限設計的研究。
  7. Considering the influence of material original flaw, the thesis gave the 4 # 125t crane of no. 3 steel - making plant of maansan steel co. for example to analyze the designing and remaining life of the crane ' s girder by using damnification limits design method. the method was based on the theory of rupture dynamics and the principle of disrepair - security

    本文以馬鋼第三煉鋼廠4 # 125t鑄造起重機主梁下蓋板大面積可見裂紋情況為例，考慮材料初始裂紋的影響，在斷裂力學理論和破損?安全設計原則的基礎上，採用損傷容限設計法來重新計算鑄造起重機的設計壽命；並對正在服役的鑄造起重機計算其剩餘壽命，為鑄造起重機的安全運行提供了較可靠的理論依據。
  8. The fem model was accurate and effective by using submodel and error estimation technique that ensured the reliability of calculation and analysis. the thesis got the measure of critical flaw and designing life of the girder. in addition, the thesis calculated the remaining life of the girder while the flaw reaching 150mm

    結合有限元分析結果和損傷容限設計方法，本文計算了馬鋼第三煉鋼廠4 # 125t鑄造起重機主梁下蓋板的臨界裂紋尺寸，及初始裂紋為0 . 5mm時主梁的設計壽命，並估算了在裂紋尺寸達到150mm時主梁的剩餘壽命。
  9. As the damage tolerance technique has being widely and deeply adopted in the design and life prediction of aircraft structures, the development of high performance and more suitable software used in damage tolerance design and assessment is more urgent. while at the same time the existing domestic software is not well suitable for requirements in engineering

    隨著損傷容限技術在飛機結構設計和壽命評估中的廣泛採用，研製高性能且實用的損傷容限分析與評定軟體系統越來越迫切，而國內現有的損傷容限分析軟體經實踐證明其性能和適用性不能很好滿足工程需要，特別是結構剩餘強度和裂紋擴展分析程序。
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