裂紋伸展 的英文怎麼說

中文拼音 [lièwénshēnzhǎn]
裂紋伸展 英文
crack growth
  • 裂 : 裂動詞[方言] （東西的兩部分向兩旁分開） open
  • 紋 : 名詞（花紋; 紋縷兒） lines; veins; grain
  • 伸 : Ⅰ動詞（展開） stretch; extend Ⅱ名詞（姓氏） a surname
  1. The results of quantitative analysis showed that the pre - tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient, and consequently decreased the fatigue resistance of the part with mechanical damage

    定量分析表明：預拉伸變形降低了疲勞裂紋擴展門檻值，提高了裂紋擴展系數，從而使管線在機械損傷的部位疲勞抗力降低。
  2. Pent notch tensile test to measure the resistance to slow crack growth of polyethylene materials for pipe and fitting products

    管和管件用聚乙烯材料耐慢速裂紋伸展的測定的缺口拉伸試驗
  3. The cracks extend along the matrix / strengthening - phases interfaces and form the cleavage steps and tear ridges. there appear some very small dimples on the fracture surfaces of the directionally solidified samples, which come from the nb - based solid solution particles in the big plates of the strengthening phases, but no dimples on the fracture surfaces of the as - cast sample. it can be concluded from above results that niobium - niobium silicide based in - situ composites ( rmics ) with a uniformly orientated microstructure can be produced by the ebfzm with high temperature gradient, and their mechanical properties can be increased

    隨著抽拉速率的提高和硅化鈮強化相間距與尺度的減小，材料的室溫拉伸強度和斷裂韌性均有提高， _ b最高可達778 . 4mpa ， k _ （ ic ）達到了46 . 3mpa ? m ~ （ 1 / 2 ） ；試樣的拉伸斷口基本表現為脆性解理斷裂的花樣，裂紋沿基體強化相界面繞過強化相進行擴展，在裂紋擴展方向存在解理臺階，並形成撕裂棱。
  4. Nanocrack might nucleate at a crack tip or in the dfz. in the thicker area, a ribbon thin area or a zigzag thin area might be formed by slip

    金屬薄膜拉伸過程中，微裂紋可以在主裂紋頂端連續形核擴展，也可以在無位錯區中不連續形核擴展。
  5. Fatigue experiments were performed to obtain the fatigue lifetime under the different loading. the parameters for law of the fatigue crack growth were obtained by crack growth experiments. in order to study the fatigue characteristics at high temperature, creep tests were also done

    本文對多種典型焊接試件開展了諸多的試驗研究工作：進行單軸靜載拉伸試驗以確定構件的強度；進行疲勞壽命試驗以測得疲勞壽命曲線；進行疲勞裂紋擴展試驗以獲得試件的疲勞裂紋擴展規律paris公式；進行蠕變試驗以考察焊接試件疲勞持久特性；進行剩餘壽命試驗以獲得試件的剩餘壽命。
  6. The proposed model - beam - particle model is validated to simulate some routine tests of concrete which including uniaxial compressive test and uniaxial tensile test to prove that the numerical model can effectively to describe the complete failure process caused by the initiation, propagation and coalescence of cracks. the influence of the meso - mechanical properties to the macroscopic failure behavior is discussed in this paper. the proposed model is employed to simulate the dynamic failure process of concrete under impact loading, and analyse the failure behavior of concrete with different impacting velocity

    本文建立了混凝土的梁-顆粒數值模型，並利用該模型進行了混凝土在單軸壓縮和拉伸載荷作用下，混凝土從微裂紋的萌生、擴展、貫通直到宏觀裂紋產生導致破壞的全過程的數值模擬，探討了混凝土材料細觀結構對其宏觀力學行為的影響；利用該數值模型，模擬了鋼彈以一定的初始速率垂直侵徹混凝土圓板的動態過程，對計算結果進行了動畫顯示，並分析了不同鋼彈初始速率對混凝土圓板破壞形式的影響。
  7. Abstract : in this article, the optimization of surface crack detection of speed reducer gear was made using fuzzy set theory, the result show that the rotation magnetic field is the best way of surface crack detection and lots of extending surface fatigue cracks were found in practice

    文摘:採用模糊集的貼近度計算對齒輪表面探傷方法進行了優化選擇，表明旋轉磁場探傷是齒輪表面探傷的最佳方法，在實用中檢測出大量的正在延伸擴展的表面疲勞裂紋。
  8. Test results showed that the fatigue crack propagation rare increased with increasing the pre - tension deformation degree, especially at the near threshold section

    結果表明：隨著預拉伸變形量的增加，疲勞裂紋擴展速率提高，尤其是在裂紋擴展的近門檻區。
  9. In the present study, experimental investigations were carried out on the fatigue crack propagation characteristics of x60 pipeline steel after different degrees of pre - tension deformation ( 5 %, 10 %, 15 % )

    摘要用單邊裂紋試樣，研究了x60管線鋼經預拉伸變形量為5 % 、 10 %和15 %后的疲勞裂紋擴展特性。
  10. Based on investigating a large amount of documents, the fatigue crack propagation behavior of mg alloys am50 & az91 is studied in this paper, as well as the tensile mechanical properties at elevated temperature. micro - mechanics of tensile deformation and the fcpr are also investigated by sem & tem

    本文在查閱大量相關文獻基礎上，對az91 、 am50鎂合金的疲勞裂紋擴展特性和高溫拉伸力學性能進行了一定的研究。藉助于掃描電鏡和透射電子顯微鏡，分析了拉伸變形和疲勞斷裂的微觀機制。
  11. 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。
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