crack velocity 中文意思是什麼
crack velocity
解釋
斷裂速度-
A new expression of fatigue crack propagation velocity
一種帶可靠性的疲勞裂紋擴展速率表達式 -
3 the design theories of cooling pipe of play down internal temperature of mass concrete about diameter, length, arrange method, rate of flow, current velocity, reduce heat time, temperature disparity to in and out, reduce heating result etc. 4 the theory of influence about concrete internal temperature and concrete crack because of transform of mixture ratio and pulverized fuel ash sophisticate quantity
西安建築科技大學博士生論文一;一;一一『一一一3降低大體積混凝土內部溫度常用的冷卻水管的管徑、長度、布置方法、水流量、流速、降溫時間、進出水口的溫差、降溫效果等的設計計算理論。 4配合比及摻加料對混凝土內部溫度和混凝土開裂的影響理論。 -
This work include : in order to demarcate chemical kinetic model inwhich organic matter generate oil and gas, constant velocity, rising temperature thermal modeling experiment is designed ; in order to demarcate chemical kinetic model inwhich oil crack into gas, isothermic thermal modeling experiment inwhich oil crack into gas is designed ; in order to establish chemical kinetic model inwhich family constituents in oil ( saturated hydrocarbon, arene, non - hydrocarbon, bitumen ) change into gas, isothermic or constant velocity jsothermal modeling experiment is designed
這一工作包括：為標定有機質成油、成氣的化學動力學模型，設計進行了恆速升溫熱模擬實驗；為標定油成氣的化學動力學模型，設計進行了等溫的油裂解成氣的熱模擬實驗；為建立油中各族組分（飽和烴、芳烴、非烴、瀝青質）成氣的化學動力學模型，進行了恆溫或恆速升溫模擬實驗。 -
Through the statistic and analysis of rock core crack, sonic wave velocity test, microcosmic structure of core slice observation by electron microscope, core strength test to the sampled damaged slope rock mass, it indicates that the damage degree of smooth blasting to slope rock mass has no obvious relation with blasting scale but with the line density of explosive filling and the strength of the rock in damaged area decreases evidently
通過受損邊坡巖體取樣巖芯裂隙的統計分析、聲波速度測試、巖芯切片微觀結構的電鏡觀察及巖芯的強度試驗，發現光面爆破對邊坡巖體的損傷程度與爆破規模無明顯關系，而與光爆孔的線裝藥密度有關，損傷區巖石的強度明顯降低。 -
Abstract : based on the hypotheses of three - piece straightening curve. it isverified that the method for using little deformation condition was true with accurate solution of three - piece straightening curve. the mechanics behavior of slab was analyzed in regard to the creep properties of high temperature slab. the results show that the strain, the strain velocity and the stress varied so smoothly that the inner crack was prevented. technical renovation is carried on by adjusting the displacement of rolls and by using the accurate solution of three - piece straightening curve
文摘:基於三段矯直曲線應變速率的假設，通過計算三段矯直曲線的精確解，驗證了使用小變形條件的正確性;考慮高溫鑄坯蠕變性能，對鑄坯的力學行為進行了分析，得出了使用三段矯直曲線方法，鑄坯應變速率、應力及應變在矯直區內變化較為平緩，可有效避免鑄坯內裂紋的形成;使用本文三段矯直曲線精確解，調整輥列位置，可進行連鑄機的在線技術改造。 -
In the second part of chapter two, the form and classification of crack is discussed in detail, reducing the formulae of the crack ' s spread velocity, controlling the forward spreading of the cracks based on the theory of rupture mechanics
在該章的第二節中，對起重機金屬結構的裂紋形式和分類進行比較詳細的描述，同時應用斷裂力學的知識，推導出裂紋擴展速度公式，控制裂紋的進一步擴展。 -
How to calculate the velocity of crack growth and how to get the life time of a structure with a nonlinear viscoelastic crack are attractive problems
如何預測裂紋的擴展速度、預測材料的壽命成為引起廣泛關注的問題。 -
The effects of water ratio, crack, strain and temperature on the acoustic wave velocity in granite samples were investigated systematically by means of tico, an ultrasonic concrete tester
摘要應用超聲波混凝土測試儀（ tico ） ，系統研究了含水率、裂紋、應力和溫度對花崗巖內波速傳播的影響。 -
This author discusses the application of multi - electrode resistivity imaging method and refraction survey to find out the crack and structure in the country rock, to classify the rock according to the wave velocity, and to offer corresponding geological data for engineering design in the anjin highway exploration
摘要在安景高速公路初勘階段，利用高密度電法及地震折射波物探方法，查明隧道圍巖裂隙、構造發育情況，根據波速對圍巖分類，配合鉆探為工程設計提供相應的基礎地質資料。 -
Along with increase of pressure, the parameters such as velocity, amplitude, main frequency and quality factor of seismic wave change big gradually, while change very weakly with the change of temperature. through testing research for artificial crack and pore model, we conclude that crack density, azimuth, opening and the change of pore have obvious influences on speed, amplitude, attenuation ( or quality factor ) and main frequency of seismic wave etc. but, seismic wave dynamic characteristics are more evident than its kinematical characteristics for the change of crack and pore parameters. therefore, it offers reliable experiment foundation for detecting crack and pore by seismic wave kinematical characteristics ( such as amplitude, attenuation and main frequency etc. )
通過對人工裂縫和孔洞模型的超聲波實驗研究，可以認為：裂縫密度、方位、張開度和孔洞密度的變化對縱橫波的速度、振幅、衰減（或品質因子q ）和主頻率等參數均有明顯的影響，但裂隙參數的變化對地震波動力學特徵參數（振幅、衰減、主頻率等）的影響遠遠大於對運動學特徵參數（速度等）的影響，這為利用地震波的振幅、衰減和主頻率等屬性參數進行裂縫和孔洞特徵的檢測提供了可靠的實驗基礎。
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