band shell 中文意思是什麼
band shell
解釋
貝形露天舞臺-
In this paper, it is proposed as a new mechanism that when a solidifying billet is in the stirring zone during continuous casting of steel, a thin steel shell is formed in front of the freezing interface, which results in a white band with a negative segregation followed by a positive one
作者提出了一個新的機制來解釋白亮帶的形成原因，即正在凝固的連鑄鋼坯位於攪拌區時，在凝固前沿形成一個薄殼，由此導致先發生負偏析，緊隨其後又發生正偏析的白亮帶。 -
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。 -
Core - shell nanocomposite particles, as attractive building blocks of advanced functional materials, have important applications in such areas as photonic band gap materials, microwave absorbing materials, electrorheological ( or magnetorhelogical ) fluids, catalysis and biology, etc
摘要核殼納米復合粒子具有許多不同於單組分膠體粒子的獨特的光、電、磁、催化等物理與化學性質，是構築新型功能復合材料的重要組元，在光子帶隙材料、微波吸收材料、電磁流變液、催化劑和生物等領域有重要應用。
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