裂紋區域 的英文怎麼說
中文拼音 [lièwénqūyù]
裂紋區域
英文
slit region-
A craze is a thin platelike region.
小裂紋是一個類似薄片的區域。All cracks were detected in regions where such manually made weld passes existed.
所以檢查到的裂紋都位於有手工焊縫存在的區域。A reliability experiment of thermal aging was carried out for the two types of joints, scanning electron microscopy, energy dispersive x - ray spectrometer and micro x - ray diffractomer were adopted to investigate the interfacial evolution behavior of joints, and kinetics model of imc formation was established. the results show that imc growth follows the parabolic law as a function of aging time at certain aging temperature, imc growth is more sensitive to the aging temperature than the aging time, the activation energy of cu - al imc growth is 97. 1kj / mol and the major forming cu - al imc are cual2 and cu9al4, the activation energy of au - al imc growth is 40. 1kj / mol and the main au - al imc are au4al and au5al2, with au2al and aual at the interfacial periphery of joints, the rate of cu - al imc growth is about 1000 times slower than that of au - al imc, and kirkendall voids and cracks are easily appeared during thermal aging in gold ball bonds while voids and cracks are absent in copper ball bonds even after aging at 200 for 2900 hours and 250 for 169 hours
研究結果表明:金屬間化合物厚度與老化時間的關系符合拋物線法則,金屬間化合物的生長對老化溫度比老化時間更加敏感; cu - al金屬間化合物生長的激活能為97 . 1kj / mol ,老化后金屬間化合物呈層狀分佈,主要相為cual2和cu9al4 ; au - al金屬間化合物生長的激活能為40 . 1kj / mol ,主要相為au4al和au5al2 ,同時在界面周邊區域生成了au2al和aual ;老化過程中cu - al金屬間化合物生長速率比au - al金屬間化合物生長速率小103數量級;金絲球鍵合點200老化96小時出現了明顯的kirkendall空洞和裂紋,但銅絲球鍵合點200老化2900小時和250老化169小時都沒有形成空洞和裂紋。The nano diamond particle improve friction surface lubricate condition, mainly by the nano particle repair and inlay effection nanometer particle deposition in the friction contact region, fills the friction damage spot promptly, has the repair function, simultaneously prevents the crack from further development, achieves the goal of prolong fatigue life
納米金剛石微粒通過微粒修復作用和鑲嵌作用,改善摩擦表面的潤滑狀態。在摩擦過程中,納米微粒沉積在摩擦接觸區域,填補摩擦損傷部位,起到修復作用,同時阻止裂紋的進一步發展,延長了陶瓷球疲勞壽命。For special example, the closed form solutions for complex potentials in matrix and inhmogeneity regions are derived explicitly when interface containing single crack or rigid line, and the appropriate expressions of the electro - elastic field intensity factors at the tip of crack or rigid line are examined
作為特例,求出了界面含一條裂紋或剛性線夾雜時基體和夾雜區域復勢的封閉形式解;同時計算了界面裂紋和剛性線尖端應力和電位移場強度因子。At one time complex structure and area of weariness crack ( including whole suspension hollow axis of swivel, half suspension adopted axletree, substituting holistic grinding steel wheels for wheel - hoop compounded wheels, different wheel - axletree structure of different locomotives, different transmission chamfer machining step of axletresses and driven traction gear etc. ) centralizing make wave clutter and repeat to disturb recognition of real fault wave
同時,由於全懸掛空心軸、半懸掛抱軸承等復雜結構車軸的使用和整體碾鋼輪陸續替代輪箍組裝式車輪,各型機車輪軸結構不同,車軸加工臺階和過渡圓角不同,從動牽引齒輪與車軸採用過盈裝配等,在這些結構復雜且疲勞裂紋產生集中的區域,探傷時極易發生波形交織和重復,難以識別真正缺陷波。Positive electrode and negative electrode that execute spanning crack prevention are simulated as the source point and merged point, so the temperature field owing to the concentration of current around the crack tip is educed at the moment when the current is switch on
將實施跨越止裂時的正、負電極比擬為電流場中的源和匯,從而導出了在瞬間電流作用下,裂紋尖端附近區域因繞流而形成的溫度場。Therefore one of efficiency means to solve cracking problem of runners is to change distribution of welding residual stress of blades, to decrease welding residual tensile stress in the dangerous area of blades or even turn to compressive stress
因此,改變葉片焊接殘余應力的分佈狀態,降低葉片危險區域的焊接殘余拉應力峰值,甚至將危險區域的拉應力轉變為壓應力,是解決轉輪裂紋問題的有效途徑之一。When the stress at the tip of crack is inflicted on the m - type ferrite particle dispersed in matrix as a second particle, not only the toughness of composites will be pro ved because of the non - elastic area produced by the particle but also the strength change of magnetic field and the stress distribution in the structural ceramics will be detected by the strength of spontaneous magnetization varying while magnetic materials being pressed or drawn
這是因為當結構陶瓷中裂紋尖端的應力作用在彌散於基體內的鐵磁體二相粒子上時,鐵磁粒子不僅在裂紋尖端周圍產生的非彈性區域使復合材料的韌性提高;而且還能利用鐵磁材料在外應力作用下自發磁化強度發生變化的性質,通過測量復合材料在應力作用下磁場強度的變化,探測出結構陶瓷中的應力分佈情況。Brushed stripe coating to all areas such as corners. edges, welds. small brackets, bolts, nuts. rivet - s. and interstices, before spraying application of each coat, to ensure that these areas have at least the minimum specified film thickness
在塗抹新塗層前,應刷掉所有區域的麻紋,比如各角落、邊緣、焊接處、小托架、螺釘、螺帽、鉚釘和裂縫,保證這些區域至少達到價格的最低膜厚度。The periodicity fluctuating has been produced by pulse magnetic field so that there are periodic high temperature region exists in sintered body, it results in the symmetrical crack in sintered body of zro2
感生磁場的存在引起電場周期性的波動,在燒結體內產生不同的溫度區域,是造成燒結體內產生分佈均勻裂紋的主要原因。In order to get a finite element formulation to analyze singular heat flux fields, the weak form of basic equations and boundary conditions describing the 2d heat conduction eigenproblems is derived for the sectorial domains in the vicinity of the interfacial crack tip
摘要為得到用於分析奇異熱流密度場的高效的有限元列式,針對不同材料中界面裂紋尖端的扇形區域,推導出二維熱傳導特徵解問題的基本方程和邊界條件的弱形式。If there are high temperature gradient between cool liner and hot liner, compressive plastic strain appear at that transient time, which lead to gas film wall bearing high tensile stress at high temperature. high tensile stress is one of main reasons which destroy combustor
分析表明,起動過程中由於熱傳導滯后引發的溫度梯度可以導致火焰筒氣膜唇邊在起動瞬間發生較大的壓縮塑性應變,進而使得該區域在工作時承受較高水平的拉伸應力,高的拉應力會導致火焰筒萌生裂紋。The a vs t curves contain stable and unstable crack growth regimes of all studied materials
所有材料的熱震裂紋增加值( a )和熱震溫差( t )曲線包含穩定和非穩定兩個區域。Sum them up to two parts : develop non - elastic area around crack tip to improve nature toughness of the composites and induce bridge between crack by supplement
歸納起來可分為兩類:即通過在裂紋尖端周圍長生非彈性區域來增加材料的固有韌性和採用補強劑來引起裂紋橋聯。A core was removed from this area so that the crack surfaces could be examined.
從這一區域取樣芯,以便檢驗裂紋表面。分享友人