裂紋鈍化 的英文怎麼說
中文拼音 [lièwéndùnhuà]
裂紋鈍化
英文
crack blunting-
One reasonable explanation is that etching removes and blunts microcracks.
有一種合理的解釋是說腐蝕能夠去掉並鈍化微裂紋。The results show that the thermal fatigue cracks after forming propagate preferentially in the hard phase, and the propagation of crack is stoped and dulled when it meet steel basic phase
結果表明:萌生后的熱疲勞裂紋優先在硬質相中擴展，遇到鋼基體相后受阻、鈍化。In the resin matrix composite materials filled with fsmf, the load is undertaken by the grain of fsmf and the resin matrix. the grain of fsmf restricts the deformation of the resin matrix, so the strength is improved. furthermore, the grain of fsmf can consume the energy of strain and controls the crack expand, so build up toughness
在fsmf填充樹脂復合材料中，載荷是由fsmf顆粒和樹脂基體共同承擔的， fsmf顆粒以機械約束方式限制樹脂基體變形，從而產生強化； fsmf顆粒可以引發銀紋和剪切帶等損傷消耗應變能，並通過鈍化和釘扎機制阻礙裂紋的擴展，從而產生增韌。This paper, applying the electro - deposition technology, analyzes and studies the crack - blunting method of cfrc by finite element simulation ( fes ) and experiment
本文利用電沉積技術對碳纖維增強混凝土的裂紋尖端實施鈍化，從有限元模擬和實驗兩個方面分析研究了混凝土裂紋的止裂方法。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。The results indicate that the mechanisms to improve the toughness of the multipiayer composite include the crack deflection along the metal interfaces, the crack divarication and passivation, the ductile - phase bridging, stretched, sliding friction, pull - out and interface delamination
對其增韌機制分析表明， tz - 3y20a mo疊層材料主要包括裂紋偏轉、裂紋并行擴展、裂紋分叉鈍化以及橋接、滑動摩擦、拔出、小塊脫落等增韌機制。The cfrc sample is always ruptured in the place where materials weakly resist outside force, and because the cracks " or damages " distribution of cfrc is random, bending strength of cfrc takes on dispersed
本文最後採用weibull統計理論對裂紋鈍化后的cfrc的抗彎強度進行了評價，通過最弱環原理解釋了weibull模數的力學意義以及它與cfrc材料中裂紋的關系。The results of whole experiment indicate that applying electro - deposition technology will be an effective method of blunting crack tip and healing crack
從整個試驗所得的效果來看，將來應用電沉積技術來鈍化甚至愈合混凝土的裂紋是一種行之有效的方法。The research work of the thesis include mainly : ( 1 ) observe a phenomenon which the two fracture modes are simultaneously found near crack tip of a four - point - bend specimen when the ratio of m / q is close to 3. 0mm, criteria m / q, when the fracture mode of four - point - bend specimen transits from void - mode to shear - mode. intensely location plastic distortion is observed in the front of crack tip and the macro - fracture of the specimen with the same m / q belongs to shear - mode fracture
本文主要在以下幾個方面取得了一定的進展：通過四點彎試件的斷口和切片試驗，觀察到裂紋尖端同時存在兩種斷裂機制? ?在兩種斷裂模式相互轉化的臨界狀態附近，裂紋前方既有鈍化和延伸區中的空穴形核擴張，又有銳化角前劇烈的集中剪切變形。分享友人