ctod 中文意思是什麼

ctod 解釋
龜裂端開口位移
  1. Research about ctod and its components 8 ", " shows that the direction angle of ctod vector is identical with the fracture angle of void - mode fracture, which is obtained through experiments, and it is also identical with the result got by peak value line of stress triaxiality. besides, 8 i " was compare with vgc as criterion for initiation of void - mode fracture

    對裂紋尖端張開位移ctod及其張開型分量~ 1和剪切型分量~ 11的分析表明，在試件發生韌窩型斷裂時，按照圓弧裂紋中ctod矢量的垂直方向預測的斷裂角與試驗測得的斷裂角符合較好，與三軸度脊線預計的結果也比較一致。
  2. Because both of ctod and j - integral can be used to evaluate structure security, there must be a relationship between them, this paper probes the relationship between ctod and j - integral along with their critical value c and jic on the basis of the fruits from the original

    由於ctod和j積分都可以作為結構安全評定的參數，它們之間必然存在著一定的聯系，本文在前人研究成果的基礎上，對ctod和j積分及其特徵值_ c和j _ （ c ）的關系進行了探索。
  3. According to the recorded full process fracture curve, the paper calculated and compared the fracture toughness ( kic ), the fracture energy ( gf ) and crack tip opening displacement ( ctod ) of the different strength grade boulder concrete and crushed stone concrete, it is found that the maximal load ( fmax ) and the fracture toughness ( kic ) of boulder concrete and crushed stone concrete increase when the strength of them increases, so does the fracture energy of boulder concrete, but the fracture energy of crushed stone concrete does n ' t obviously increase when it ' s strength increases. the crack tip opening displacement ( ctod ) of all specimens chang less when the strength of concrete increases, so it is concluded that the location of the axle in the ligament of the specimens is relatively stable

    根據記錄的全曲線，計算了不同強度等級的卵石混凝土、碎石混凝土的斷裂韌度k _ （ ic ） 、斷裂能g _ f以及裂縫的尖端開口位移ctod ，比較了不同強度等級卵石混凝土及碎石混凝土的斷裂韌度k _ （ ic ） 、斷裂能g _ f以及裂縫的尖端開口位移ctod的關系，發現卵石混凝土、碎石混凝土的荷載峰值fmax 、斷裂韌度k _ （ ic ）隨強度增加而增加，卵石混凝土的斷裂能g _ f隨強度增加而呈增加趨勢，碎石混凝土的斷裂能g _ f隨強度增加變化趨勢平直，增勢不明顯。
  4. Crack tip opening displacement, ctod

    裂尖張開位移
  5. The second order regressive polynomial was determined by the curve and the value of ctod was estimated furthermore

    可以使一組沒有規律的數據，成為一條光滑的曲線。
  6. Ctod ( crack tip opening displacement ) and j - integral are two important parameters in elastic - plastic fracture mechanics

    Ctod （ cracktipopeningdisplacement ）和j積分是彈塑性斷裂力學研究方法中的兩個重要參數。
  7. Fracture mechanics toughness tests - method for determination of kic, critical ctod and critical j values of welds in metallic materials

    斷裂機械韌性試驗.第2部分:金屬材料焊接的kdownidownc值臨界ctod值和臨界j值的測定方法
  8. Aiming at the deficiencies in the ctod criterion applied to analysis of critical crack propagation, a new fracture criterion is established

    針對ctod準則在混凝土壩裂縫失穩擴展分析中的不足，提出了一種裂縫失穩擴展新判據。
  9. The failure of evaporate - self vessel was analyzed by means of chemical composition analysis, mechanical property testing, ctod determination, micrographic and sem inspection

    摘要採用化學成分分析、力學性能試驗、宏微觀檢驗等方法對自蒸發器材質和裂紋成因進行了分析。
  10. With the method of accumulation in the gray theory, a group of experiment data of crack tip opening displacement ( ctod ) at different temperatures was accumulated two times, and then the data became a smooth curve

    摘要把不同溫度下的裂紋張開位移（ ctod ）試驗數據，用灰色理論中的累加方法，進行二次累加。
  11. The test data and finite element calculation data were compared, moreover, the ctod value from the experiment and the j value from the experiment and finite element calculation were related

    本文把試驗數據和有限元計算數據進行了比較，並且用曲線擬合的方法，把試驗ctod值和j積分值及試驗ctod值和有限元計算j積分值聯系起來。
  12. This paper elaborates ctod and j - integral completely beginning with the basic concept of the two parameters, moreover, it performs an easy review to the relationship between them along with the computational methods and experimental means respectively

    本文從ctod和j積分的基本概念入手，對這兩個參數進行了全面闡述，並且對它們之間的關系問題以及各自的計算方法和試驗方法做了簡單的回顧。
  13. Ctod is not a direct and close parameter for stress - strain field, so it is still difficult to define and measure ctod, but because it can be used to solve the engineering problems effectively, it is widely used in the field of engineering

    Ctod不是一個直接而嚴密的應力、應變場參量，其確切定義和直接測量還存在困難，但由ctod法得到的一些經驗公式能有效地解決工程實際問題，因而得到工程界的廣泛應用。
  14. 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。
  15. By comparing the fracture toughness ( kic ), the fracture energy ( gf ) and the crack tip opening displacement ( ctod ) of the same strength grade concrete, it is found that the values of the fracture toughness ( kic ), the fracture energy ( gf ) and the crack tip opening displacement ( ctod ), tested by three - point - bending method and wedge - split tensile method approach, so it is proved that the fracture toughness ( kic ), the fracture energy ( gf ) and the crack tip opening displacement ( ctod ) are related to its own properties such as material, specimen size, and crack size, but unrelated to the test - method

    通過比較三點彎曲法和楔入劈拉法測定的相同強度等級混凝土的斷裂韌度k _ （ ic ） 、斷裂能g _ f以及裂縫的尖端開口位移ctod ，發現兩種試驗方法測定的斷裂韌度k _ （ ic ）斷裂能g _ f以及裂縫的尖端開口位移ctod的數值接近，從而證明混凝土斷裂韌度、斷裂能、 ctod的值僅與材料、試件尺寸、裂縫尺寸等試件自身的性質有關，而與試驗方法無關。
  16. An additional experiment is performed, and the weld specimens and heat effected zone specimens of dh36 steel are researched, through which the outcomes from the formulas of the standard and from other formulas is compared, which demonstrates the validity of standard test means for ctod and j - integral

    另外還進行了一個附加試驗，對具有不同尺寸的dh36鋼的焊縫試樣和熱影響區試樣進行了研究，將本文所用標準中公式的計算結果與其它經驗公式的計算結果進行了對比，進一步證明了ctod和j積分標準試驗方法的有效性。
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