mesomechanics 中文意思是什麼
mesomechanics
解釋
細觀力學尺度約為01-
Physical mesomechanics and computer - aided desing of materials. novosibirsk, science, 1995, 320p
材料的物理技術及電腦輔助設計」 ，新西伯利亞科學出版社， （俄文） ， 1995年，共320頁。 -
Based on lots of experiments, by combining the progress in mesomechanics with fea computation and analysis, this thesis investigated many parameters " effect on crack with an arc - tip in plain mixed - mode fracture, and compared existing criteria for fracture initiation, fracture direction and fracture mode transition
本文主要的工作是在試驗的基礎上，結合細觀斷裂力學當前的研究進展，通過有限元計算和模擬分析，研究了平面復合型斷裂中各種力學參量對圓弧尖端裂紋斷裂的影響，比較分析了現有的起裂判據、斷裂擴展方向的判定方法以及斷裂模式的轉換條件。 -
In short, the analysis of arc - tip fracture shows that : the initiation of void - mode fracture can be judged by vgc criterion, or by j ". according to sx criterion ; fracture direction of void - mode fracture can be determined by ctod and peak value line of stress triaxiality. the mesomechanics mechanism of shear - mode fracture need further study, and analysis found direction of plastic belt is consistent with the direction of shear - mode fracture
綜上所述，本文通過對圓弧尖端裂紋的分析表明：對于韌窩型斷裂的起裂，可以依據-復合型斷裂的sx準則按照i ~ 1來預測起裂載荷，也可用v _ （ gc ）判據來預測起裂載荷，二者結果相近；對于韌窩型斷裂的斷裂角，用ctod矢量方向和三軸度脊線方向判斷均和試驗結果基本。 -
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。 -
In the present thesis, the mesomechancisms of two different fracture modes of metals has been analyzed by mesomechanics methods
已有的研究表明，局限於宏觀斷裂力學范圍之內的研究難以取得突破性的進展。 -
Ductile structural ceramics. part 14 in : “ physical mesomechanics of heterogeneous media and computer - aided desing of materials ”. cambridge interscience publishing, 1998
陶瓷的可塑結構」 ，第14部分在: 」材料的多相介質物理技術及電腦輔助設計」 ，劍橋世界科學刊物。 1998年。 -
The theoretical and applied research results for mesomechanics, theories of strain gradient, polar continuum mechanics, nonlocal continuum mechanics and basic laws are discussed one by one in the present paper
分別論述了細觀力學、應變梯度理論、極性連續統力學、非局部連續統力學及基本定律和原理在理論和應用方面的研究成果。 -
Whereas block element of interface element method ( iem ) could be arbitrary shape, the interfaces between block could describe the phenomenons of slip and crack, analysis of mesomechanics of concrete applying iem is appropriate. the model and arithmetic of iem is introduced in the paper
鑒于界面元離散模型中的塊體元可以為任意形狀，塊體元交界面的界面又能描述滑移或開裂現象，將其應用於混凝土多相材料的細觀力學行為分析及其對宏觀性能的影響是很合適的。
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