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hydrostatic tension
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  静水拉
     The maximum hydrostatic tension stress in the hydrided zircaloy-4 usually occurs in the region of the hydride-matrix interface, which is irrelevant to the loading path.
     不同加载路径下, Zr-4合金基体的最大静水拉应力区位于氢化物与基体的界面附近.
短句来源
     Higher speed, smaller feed and larger tool tip radius help to decrease hydrostatic tension in machined layers, which improves the surface integrity of the machined workpiece and eliminate residual stresses.
     结果表明:切削速度愈高,进给量愈小,刀具刀尖半径愈大,则工件加工层上的静水拉应力愈小,表面质量愈好;
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  “hydrostatic tension”译为未确定词的双语例句
     The void nucleation, growth, hydrostatic tension and material softening are discussed in the neck region.
     讨论了颈缩区空穴形核、扩张、静水应力以及材料软化的问题,初步揭示了空穴的演化过程和材料的破坏机理。
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  相似匹配句对
     The Tension of Home
     家园下的张力
短句来源
     Tension in Artwork
     浅谈张力在美术作品中的作用
短句来源
     The void nucleation, growth, hydrostatic tension and material softening are discussed in the neck region.
     讨论了颈缩区空穴形核、扩张、静水应力以及材料软化的问题,初步揭示了空穴的演化过程和材料的破坏机理。
短句来源
     (4) Hydrostatic test.
     (4) 液压试验。
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     injection:hydrostatic for 30 s;
     虹吸法进样 30s ;
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  hydrostatic tension
A series of hydrostatic tension tests are performed at room temperature to provide new insight into the progressive deterioration of the bulk stiffness.
      
Stress softening of elastomers in hydrostatic tension
      
In thick and thin joints, macroscopic plastic instability and hydrostatic tension respectively are the major causes of void growth and ductile fracture.
      
The experimental results are combined with the associated flow rule to show that the yield surface is asymmetric with respect to hydrostatic tension and compression.
      
The average hydrostatic tension and pressure stresses in soft and hard phases developed during monotonic loading make the soft phase harden and hard phase soften.
      
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The initiation of mixed-mode crack is usually determined by one of se-veral mixed-mode fracture initiation criteria. During the past two decades, the[G]_(max) criterion, [S]_(min) criterion and [σ_θ]_(max) criterion were presented one afteranother. It has been found that the [G]_(max) criterion, [S]_(min) criterion and [σ_θ]_(max)criterion are appropriate for the brittle fracture and penetrated crack. In 1986,Chen applied these criteria to the surface crack problems and found that thereare some defects in these...

The initiation of mixed-mode crack is usually determined by one of se-veral mixed-mode fracture initiation criteria. During the past two decades, the[G]_(max) criterion, [S]_(min) criterion and [σ_θ]_(max) criterion were presented one afteranother. It has been found that the [G]_(max) criterion, [S]_(min) criterion and [σ_θ]_(max)criterion are appropriate for the brittle fracture and penetrated crack. In 1986,Chen applied these criteria to the surface crack problems and found that thereare some defects in these criteria [1]. These defects are chiefly the followingones: (1) All these three criteria did not consider the effect of the small-scaleyielding at crack front. (2) They all considered just one factor of crack initiation and neglectedother complicated factors of crack initiation. To eliminate these defects, according to the micro-theory of fracture me-chanics, the appearance of fracture section and some known results, three frac-ture initiation criteria are proposed in this paper by using respectively thedilational strain energy density on the elastic-plastic boundary at crack front,the hydrostatic tension stress on the constant strain energy density plane aro-und crack-tip, and the plastic area size near crack-tip as the parameters underthe small-scale yielding condition. To test the three criteria proposed in this paper, the surface inclined cra-ck, which is most harmful in practice, is studied. In Ref. [1], because of somedifficulties, the calculations are very limited and only concerned with theoutside and deepest points of surface crack. But the interior points are alsovery important. So in this paper the calculations of some interior points alongthe surface crack front are done. By using the three criteria, the general ma-thematical expressions of the initiation angles (α_i~*、θ_i~*) and the critieal loadsQ_i~* at the arbitrary points of the semi-elliptical surface inclined crack aregiven. The initiation angles (α_i~*、θ_i~*) and the critical loads Q_i~* of LC4CS finitewidth plate with a semi-elliptical surface inclined crack under uniform tensionare calculated when the location angle φ is equal to 0°, 15°, 30°, 45°, 60°,75° and 90° and the inclined angle β is equal to 15°, 30°, 45°, 60°, 75° and90° respectively. The curves θ_i~*-φ,θ_i~*-γ, α~(1/2)Q_i~*/WBK_(Ie)-φ and α~(1/2)Q_i~*/WBK_(Ie)-β are plotted. The calculated results are discussed and compared with the results in Ref. [1] which are from the [G]_(max) criterion, [S]_(min) criterion,[σ_θ]_(max) criterion and experiments. All results show that the values from thenew three criteria are better than those from the old three criteria and agreewith ASTM standard completely [18]. So the authors conclude that the newthree criteria proposed in this paper are more practicable than the [G]_(max) cri-terion, [S]_(min) criterion and [σ_θ]_(max) criterion.

本文以裂纹前缘弹塑性分界面上的体积应变能密度、等能量密度面上的三轴张力和塑性区尺寸为参数,提出了小范围屈服条件下的三个复合型表面裂纹起裂准则;推出了表面裂纹前缘任意点的起裂角(α_i,θ_i)和起裂载荷Q_i表达式;计算了LC4CS板材上表面裂纹倾斜角β分别为15°、30°、45°、60°、75°和90°时裂纹前缘定位角(?)分别为0°、15°、30°、45°、60°、75°和90°各点的起裂角(α_i、θ_i)和起裂载荷Q_i;绘制了θ_4-β、θ-(?)、a~(1/2)Q_4/WBK_(Ie)-β和a~(1/2)Q_4/WBK_(Ie)-(?)曲线。将三个准则所得的计算结果进行了讨论并与文献[1]中[G]max、[S]min和[σa]max三个准则计算值和实验值进行了比较,本文所提出的三个准则较[G]max、[S]min和[σ_θ]max准则更符合实际。

Hydrogen induced cracking of 0.3% C,1% Cr, 1% Mn, 1% Si highstrength steel has been studied under simple mode Ⅰ, mode Ⅱ and (Ⅰ+Ⅱ) mixedmode loading conditions. After being hydrogen-charged in 1N H_2SO_4 solution, thematerial behaved hydrogen embrittlement in all the cases studied. The results showthat simple mode Ⅰ or mode Ⅱ loading are more susceptible to hydrogen embrittle-ment than (Ⅰ+Ⅱ) mixed mode. For explaining the experimental results, the effectsof hydrostatic tension as well as plastic deformation...

Hydrogen induced cracking of 0.3% C,1% Cr, 1% Mn, 1% Si highstrength steel has been studied under simple mode Ⅰ, mode Ⅱ and (Ⅰ+Ⅱ) mixedmode loading conditions. After being hydrogen-charged in 1N H_2SO_4 solution, thematerial behaved hydrogen embrittlement in all the cases studied. The results showthat simple mode Ⅰ or mode Ⅱ loading are more susceptible to hydrogen embrittle-ment than (Ⅰ+Ⅱ) mixed mode. For explaining the experimental results, the effectsof hydrostatic tension as well as plastic deformation ahead of crack tip has beendiscussed.

本文研究了30CrMnSiA高强钢在纯Ⅰ型、纯Ⅱ型和(Ⅰ+Ⅱ)复合型加载条件下的氢致开裂。实验表明,在1NH_2SO_4溶液中预充氢的试件在上述加载条件下均表现出氢致脆性。纯Ⅱ型氢致开裂门槛值K_(ⅡH)/K_(ⅡX)=0.27,与纯Ⅰ型门槛值K_(ⅠH)/K_(ⅠX)=0.29基本相同,而在K_Ⅱ/K_Ⅰ比值为0.27,0.4和0.81时,(Ⅰ+Ⅱ)复合型氢致开裂门槛值分别为0.36,0.41和0.37,表明纯Ⅰ型和纯Ⅱ型具有更高的氢脆敏感性。最后用自Ⅰ型加载向Ⅱ型过渡时,三轴张力和塑性变形程度这二个矛盾因素对氢致开裂的共同作用解释了上述实验结果。

The Gurson's constitutive model is investigated. Based on Gurson's constitutive model and large elastic\|plastic deformation, necking behavior of a round tensile bar is analyzed numerically. The void nucleation, growth, hydrostatic tension and material softening are discussed in the neck region. From the numerical results, it indicates that the developments of void and damage mechanism of material are revealed.

对Gurson本构方程作了初步的研究,并对圆柱光滑拉伸试件在颈缩阶段用Gurson本构方程做了大应变弹塑性有限元分析。讨论了颈缩区空穴形核、扩张、静水应力以及材料软化的问题,初步揭示了空穴的演化过程和材料的破坏机理。有限元分析的结果表明,颈缩阶段空穴长大聚合机理非常显著,而形核作用相对较弱。

 
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