fatigue ratio 中文意思是什麼
fatigue ratio
解釋
疲勞比值-
Fiber reinforced plastic rebar ( frp ) is a new composite, which is composed of fiber acting as reinforced material, synthetic resin acting as matrix, and some adequate auxiliaries, and is formed through a pultrusion process and necessary surface process. it has a high strength to weight ratio, excellent non - corrosive characteristic, fatigue - resistant characteristic, strong designability and magnetic neutrality, so it can be used in the applications with special performance requirements or where reinforcing bars are subjected to severe chemical attack
纖維增強塑料筋是以纖維為增強材料，以合成樹脂為基體材料，並摻入適量輔助劑，經拉擠成型技術和必要的表面處理所形成的一種新型復合材料，具有比強度高、耐腐蝕性能好、可設計性強、抗疲勞性能好、耐電磁等獨特優點。 -
Critical fatigue reinforcement ratio of concrete beams reinforced by cold - rolled deformed steel bar
冷軋帶肋鋼筋混凝土受彎構件的疲勞界限配筋率 -
The influence of stress ratio on maximum crack width of specimens is obvious, and the larger the stress ratio is, the longer the fatigue life is, it can influence the mechanical property of specimens directly
應力比對試件梁的最大裂縫寬度影響顯著，應力比越大，疲勞壽命越長，直接影響試件梁在疲勞荷載作用下的性能。 -
Specimens ’ cracking load under dead - load, fatigue failure characteristic, fatigue life, deflection of span - centre, fatigue flexural rigidity, maximal crack width, development of cracks and strain of concrete and steel bars have been investigated. the influence of fatigue cycle characteristic, ratio of reinforcement, kinds of aggregate and concrete compressive strength on the specimens ’ fatigue behavior has been also investigated
對試件的靜載下開裂荷載、疲勞破壞特徵、疲勞壽命、疲勞荷載作用下的跨中撓度、截面疲勞抗彎剛度、裂縫開展情況及最大裂縫寬度、鋼筋及混凝土在循環荷載作用下應變等內容進行了研究，分析了疲勞循環特徵值、縱筋配筋率、骨料種類、混凝土抗壓強度等因素對試件疲勞性能的影響。 -
Studies on the fatigue crack propagation rate ( fcpr ) indicate that load ratio ( r ) has a great effect on the fcpr : the greater load ratio is, the higher the fcpr becomes, and the lower kth shows. compared with load ratio, the thickness of the specimen has a lower effect on the fcpr
對鎂合金的疲勞裂紋擴展特性的研究表明：載荷比r對鎂合金az91 ， am50裂紋擴展行為具有很大的影響。 r值越大，裂紋擴展速率越高，疲勞門檻值k _ （ th ）越小；試樣厚度t對鎂合金az91 、 am50穩態裂紋擴展速率的影響沒有r值那麼明顯。 -
There is a slight drop of the fcpr when the specimen s thickness increases. however, the thickness of the specimen exerts a great influence on kth and fatigue life ( n ) : the thicker specimen is, the higher fatigue life ( n ) becomes, and the greater kth shows. under control of the same conditions, the fcpr of am50 is not so high as that of az91. there are some correlations between load ratio ( r ) and the fatigue surface : when load ratio becomes great, small flat surfaces increase while dimples decrease
試樣厚度增大，穩態裂紋擴展速率略有減小。但是，試樣厚度影響試樣的疲勞壽命和門檻值：試樣越厚，疲勞壽命越長，門檻值越大；在試樣尺寸和加載條件相同的情況下， am50的疲勞裂紋擴展速率較az91小，疲勞壽命則比az91長。載荷比r影響試樣的斷口形貌：載荷比r越大，對應相同k值出的斷口小平面越多，韌窩越少。 -
According to our experimental investigations of varying load amplitude, it was found that the phenomena of fatigue crack growth retardation occurred for pmma material following a high overload cycle exerted among the regular constant amplitude load cycles, the ratio of peak value of overload to that of the regular cycles should be over at least 1. 35 to make the retardation taking effect. the experiment scheme for measuring the shutting - off ratio of overload ( defined as the overload ratio when da / dn < 10 - 7 / cyc. )
本文試驗分析了變幅載荷對裂紋擴展的影響，證實了有機玻璃也存在超載遲滯現象，通過金相觀察分析，提出超載遲滯的過程實際上是裂紋前緣萌生新的裂紋的過程的觀點，同時提出超載遲滯的合理的解析，並且給出超載遲滯比，為隨機載荷下疲勞擴展模型的建立提供了一個重要的參數。 -
Advanced composite is widely used in designing the structure of aircrafts, for it has some excellent performances such as excellent fatigue, high strength and stiffness ratio, etc
先進復合材料比強度、比剛度以及良好的抗疲勞特性等諸多優異性能為飛機結構工程設計實踐廣泛應用。 -
What is taken account of includes the effects of the material, geometrical shape, manner of loading, ratio of cycle stress, residual stress and short crack in weld toe on fatigue strength
該模型考慮了材料、幾何形式、荷載形式、應力比、尺寸效應、殘余應力及焊趾根部短裂紋等因素對疲勞強度的影響。 -
With the typical on - axis fatigue tests to get the relative s - n curves of unidirectional laminates, executed at certain stress ratio, it is possible to predict the fatigue life of multidirectional laminates subjected to cyclic stresses of different stress ratios. this would tremendously reduce test costs for laminate structures
考慮了層壓板中單向層面內多軸應力和平均應力的影響，在已知單向板在確定應力比下受典型單軸循環應力的s - n曲線的基礎上，預測任意鋪疊次序層壓結構在不同應力比的循環載荷下的疲勞壽命。 -
( 4 ) the stress level, stress ratio, loading frequency and failure probability, which determine the fatigue life of concrete, are served as the input of the neural network while the fatigue life as output. the nonlinear relations of them are described wih the structure of neural network
（ 4 ）把決定混凝土疲勞壽命的應力水平、應力比、加載頻率和破壞概率作為神經網路的輸入，以疲勞壽命作為網路的輸出，用網路結構描述它們之間的非線性關系。 -
By utilizing the finite element analytical calculation and impacting fatigue test, hybrid ratio and mode of hybrid of bicycle frame in hybrid fiber compound materials were determined, and the optimal design was carried out
利用有限元分析計算和沖擊疲勞試驗，確定了混雜纖維復合材料自行車車架的混雜比、混雜方式，並進行了優化設計。 -
By analyzing the influence of hemisphere pits with different dimension and ellipsoid pits with different aspect ratio on stress and strain distribution of lap joint, the possible propagation of fatigue crack was discussed, and the effects of localized pitting corrosion on the structural integrity of lap joints were discussed
通過分析不同尺寸的半球形蝕坑和不同長短半軸比值的半橢球形蝕孔應力應變分佈的影響，探討搭接件疲勞裂紋的可能擴展方向，討論局部孔蝕對搭接件結構完整性的影響。 -
By far the primary methods to improve the quality of cement concrete is to vary the ratio of differete conpound, but of effection is not evidently the tensile strength and toughness of soil stabilization with portland cement mixed fiber obtained is higher than those of the soil stabilization with portland cenment. adding polypropylene to cement concrete can increase the conrete pavement performance, improve the flexural fatigue property
目前，提高水泥路面使用品質的途徑之一就是通過改善水泥混凝土的配合比來提高水泥混凝土的各種路用性能，但是其實際使用效果並不是很顯著。採用在水泥混凝土中摻加纖維的方法可以獲得比普通水泥混凝土抗拉強度和韌性更高的纖維混凝土。從而大幅度的提高混凝土的彎曲疲勞等路用性能。 -
Moreover, the influence factors of stress ratio, intermittent time, loading order etc. to fatigue strength were discussed
另外，本文詳細分析了、加載順序、間歇時間、加工缺陷和安裝誤差等因素對疲勞強度的影響。
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