macro crack 中文意思是什麼
macro crack
解釋
大裂隙-
According to fractal propagation characteristics of fatigue crack, it defines structure fatigue fractal damage variables and sets up the structure fatigue damage fractal evolution mode which macro and micro are consistent
採用分形維數定義了結構疲勞分形損傷變量，根據疲勞裂紋的分形擴展特點，建立了宏細觀統一的結構疲勞損傷分形演化模型。 -
The macro - mechanical properties ( the elastic constants ) of the fractured rocks can be connected with the micro - parameter of crack ( crack number density )
這個模型將微觀隨機參數（裂紋數密度）與非均勻裂縫介質的宏觀性質（彈性常數）直接聯系起來。 -
It is very important to study the correlation of cyclical strain on the side of hole with fatigue life cycle for understanding the material damage and micro - crack initiation, and for preventing macro - crack initiation and propagation
研究孔邊循環應變與疲勞循環次數的相關性，對于研究材料損傷及微裂紋的產生，預防宏觀裂紋的產生及擴展具有十分重要的意義。 -
This paper sets about studying room - temperature fracture mechanisms of tial - based alloys of fully lamellar and duplex microstructures through the measurements of mechanical properties, in - situ observations of fracture surfaces and finite element method ( fem ) calculations, the measurement of macro - parameters, the observations of fracture surface and fem calculations on notch specimens ( 4pb ) and pre - crack specimens ( 3pb ), detailed observations of configuration changes at pre - crack tips in metallographic cross sections of specimens unloaded at various applied loads and fem calculation
本文通過光滑試件機械性能的測定，原位拉伸試件的表面觀察、相應的斷口觀察及有限元計算；缺口彎曲宏觀參數的測定、斷口觀察及其有限元計算；裂紋彎曲參數的測定、裂紋卸載試樣剖面的觀察及其有限元模擬與計算研究了tial基合金全層組織和雙態組織的室溫斷裂機理。 -
In regard of the effect on stress intensity factor, a macro - element method to calculate stress intensity factor is simplified to analyze the variety of the stress intensity factor under different crack eccentricity ratio
對于偏心裂紋應力強度因子，在計算方法上有效地簡化了文獻[ 5 ]中提出的大單元有限元計算模型，並且用於分析裂紋偏心度對于應力強度因子的影響。 -
According to analyze experimental data of flexural toughness test of synthetic macro - fiber reinforced concrete, based on astm and jsce method, a new flexural toughness evaluating method is first proposed, it may well and truly reflect toughen and crack arrest of synthetic macro - fiber
通過對粗合成纖維混凝土抗彎韌性試驗數據的分析，基於美國astm及日本jsce方法，提出了粗合成纖維混凝土抗彎韌性新評價方法，該韌性評價方法能夠準確地反映粗合成纖維的阻裂增韌效果。 -
Synthetic maro - fiber is a new type reinforcement material that appeared in the last of 20th century. when compared to steel fiber and synthetic micro - fiber, the synthetic macro - fiber offers a large number of advantages : ( 1 ) light ; ( 2 ) evenly distributed ; ( 3 ) erosion resistance ; ( 4 ) obviously improves the impact resistance, flexural toughness, fatigue and seismic properties ; ( 5 ) resistance for early crack ; ( 6 ) prominent advantage in shotcrete
粗合成纖維興起於20世紀末，它是一種新型的增強增韌材料，相對于鋼纖維、細合成纖維，它具有明顯的競爭優勢: （ 1 ）質輕; （ 2 ）無腐蝕; （ 3 ）易於均勻分散; （ 4 ）顯著提高混凝土的韌性、抗沖擊、抗疲勞、抗震防爆性能; （ 5 ）可以提高塑性混凝土的早期抗裂性能; （ 6 ）在噴射混凝土中具有顯著的優勢。 -
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。 -
The failure of concrete is caused by the formation, growth and confluence of crack, then creating the macro cracks in concrete
研究表明混凝土的開裂，首先起源於骨料和砂漿的粘結界面，進而發展至砂漿中。
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