peak value of stress 中文意思是什麼
peak value of stress
解釋
峰值應力-
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。 -
Hydraulic pile hammer is one of the pile driving machines that drive prefabricated piles into the ground in the construction of pile foundation such as construction, bridge, dock, etc. with the development of science and technology, the prefabricated pile driving machines evolve from block hammer, steam - hammer, diesel hammer to hydraulic hammer. hydraulic pile hammer is one of ideal prefabricated pile driving machines because it can adjust stress waveform, decrease stress peak value, prolong effectual action when it drives piles. hydraulic pile hammer is used widely and formed series in developed countries now
液壓打樁錘是用於建築、橋梁、碼頭等樁基礎施工中打入預制樁的樁工機械。隨著科學技術的進步，預制樁施工機械由落錘、汽錘、柴油錘，發展到了液壓打樁錘。用液壓打樁錘打樁，可以調整撞擊應力波波形，減小應力峰值，延長有效作用時間，是一種比較理想的預制樁施工機械，目前在發達國家已被廣泛使用，並形成了系列化。 -
Through analyzing bed ' s response to wave, in the condition that super - stratum is more hard and second - stratum is more soft in region of interest, super static interstitial hydraulic pressure amplitude die away rapidly between stratums, before in sight of boundary between hard and soft stratum, plane effective pressure increase to max. shear stress reach peak value when bed thickness is approximately 2. 7 meters, then it will decrease to the minimum on the place where the flexible soil has a common boundary with the rigidity, so the boundary is the most destroy plane on engineering. on the basis of reconnaissance in situ, in normal situation of sea, the structure slides to the basin along the boundary
通過對底床在波浪下的響應分析，對于研究區底床上層較硬而第二層較軟的情況，超靜孔隙水壓力幅值在層間交界處迅速衰減，在臨近硬、軟地層交界處前，水平有效應力增至最大，剪切應力在底床厚度大約2 . 7米左右達到峰值，然後減小，到硬、軟層土交界位置，達到最小，因此這個界面就是最容易發生破壞的工程軟弱面，現場勘查證明，即使在正常海況下，構築物也會沿坡以此交界面為滑動面，緩慢向「盆」底滑動。 -
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。 -
The thesis studied the change of stress triaxiality in the four - point curved beam made in 16mnr with arc - tip crack and its important effect. in the beam, the points of peak value of stress triaxiality distribute along a line, whose direction is well consistent with the fracture direction got by experiment when so > 3mm
在圓弧裂紋試件中，裂尖附近的三軸度較高的點呈脊線分佈，按照脊線分佈擬合計算得到的三軸度脊線夾角在偏心距so 3mm時與試驗測得的斷裂角符合較好，這種情況下試件發生的是韌窩型斷裂。 -
The computation results show that after reinforcing the soft and weak floor, the deformation of the surrounding rock of sides gets smaller, especially, that in the lower part of the sides decreases to a larger extent ; the size of plastic zones and the scope of strength - softening region in surrounding rock of sides become smaller ; the area that has an increase in the maximal principal stress in surrounding rock of sides shrinks, and the zones of peak - value of maximal principal stress approach the periphery of roadway
計算結果表明，加固軟弱底板後巷道兩幫圍巖變形量減小，尤其是巷道兩幫下部圍巖變形量減小幅度較大，兩幫圍巖塑性區范圍和軟化區范圍縮小，兩幫圍巖主應力升高區范圍縮小，主應力峰值區域更加靠近巷道周邊。 -
( 4 ) the practical measures show that : stress of pipelines accords with national demand and peak value of vibration decreases from 1mm to 0. 2mm, whereas the inherent frequency of each phase increased generally
改造完成後的實際測量表明：管道應力符合國標要求，振動峰值從1mm下降到0 . 2mm ，各階固有頻率普遍提高。
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