repeated strain 中文意思是什麼
repeated strain
解釋
疲勞應變-
The results also indicated that the virulence of the most ibdv field collected in recent years was between the typical very virulent and standard virulent strains. a very virulent strain gx8 / 99 of ibdv was studied for its mortality in spf chickens and commercial egg - type chickens at different age inoculated with bursal suspension of 20 - 2000 eld50 in repeated experiments
選擇致病性最強的來自廣西的gx8 99株，在對法氏囊懸液中病毒用雞胚半數致死量（ eld _ （ 50 ） ）定量測定后，在不同年齡的spf雞和商品代蛋用型塢多次重復地比較研究了該毒株的致病性。 -
In this dissertation, the effect of texture, heat - treatment, and hydrogen on the lcf behavior of zircaloy - 4 and the cyclic deformation behavior for zircaloy - 4, n18 alloy and n36 alloy have been investigated systematically using fully - reversed tension - compression loading under strain control ( r = min / max = - 1 ), while the evolvement of the friction and back stresses versus the number of repeated working cycles and the plastic strain amplitude has been studied, and the thorough discussion combined with the analysis result of fatigue sub - structure, friction and back stresses, and fatigue fracture has been given to the mechanism underlying the lcf behavior of alloys
本文採用對稱拉壓循環變形方法（ r _ = _ （ min ） _ （ max ） = - 1 ） ，系統研究了織構、熱處理狀態、氫對zr - 4合金低周疲勞性能的影響， zr - 4合金、 n18合金和n36合金的循環變形行為，並研究了摩擦應力、背應力隨循環周次、塑性應變幅的變化規律。結合疲勞亞結構和疲勞斷口的分析結果，深入探討了影響合金低周疲勞行為的作用機制。 -
It was demonstrated that the values of domain strain decreased while the rate in reduction of the domain strain lowered with larger n. combined the xrd with sem results, the non - fracture mechanism of the sample when pure electric fatigue was applied can be described as : at an earlier stage of electric fatigue, the high repeated incompatible strain led the major fracture mode for the fatigued sample to be of inter - granular. the ability of domain switching in a - - > c of the sample along with the direction of an applied electric field kept dropping, hence, reduced the domain strain
結合xrd和sem觀測，提出了純電疲勞作用下試樣不會發生斷裂的機理：電疲勞初始階段，試樣中的非協調高應變導致沿晶微裂紋，隨著微裂紋的增加，使得試樣沿外電場方向發生a c疇的能力不斷降低，從而導致疇變應變減小，當應變減小到一定程度時，將不足以在試樣中引起新的微裂紋或使原有微裂紋繼續伸長。
分享友人