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塑性耗散
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  plastic dissipation
     The results show that the plastic dissipation will be 1/3 of the input energy when plastic deformation occurs.
     结果结果表明:只要存在塑性耗散,耗散的能量就占外载输入能量的1/3。
短句来源
     Limit analysis and plastic dissipation power of landslides
     滑坡极限分析与塑性耗散功率
短句来源
     Based on increment loading & changeable rigidity method and using three-dimensional non-linear finite element method and the elasticity-plasticity damage constitutive relation, the law of the effect of three different by-stage excavation scheme for multi-step excavation process on the stress disturbing, the plastic dissipation energy, the plastic region and the displacement around opening had been simulated and analyzed, and the project of excavation orders had been optimized and there were important engineering value.
     基于增量荷载变刚度法,采用三维非线性弹塑性有限元方法与弹塑性损伤应力的本构关系,模拟分析了三种分期开挖方案多步开挖过程的围岩应力扰动、塑性耗散能、围岩塑性破坏区大小与洞周位移的变化规律,优化了分期开挖方案,具有重要的工程实用价值;
短句来源
     The non-differentiability of the plastic dissipation calculated through the Von-Mises yield function leads to convergence difficulties when using mathematical programming to solve upper bound limit analysis of pipe elbow.
     应用数学规划在对弯管进行极限上限分析时,使用Mises屈服函数所计算的塑性耗散功的不可微性可导致收敛困难。
短句来源
     This problem is avoided replacing the plastic dissipation by the strain energy of a ficticious elastic-plastic material with a nearly infinite Young modular.
     通过具有无穷大弹性模量的假想弹塑性材料的应变能代替塑性耗散功,这个问题可被解决。
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  “塑性耗散”译为未确定词的双语例句
     Scrubbing and rolling heat was main make up of plastic dissipative energy and elastic hysteresis energy.
     搓滚热量主要来源于搓滚过程中的塑性耗散能和弹性滞后能。
短句来源
     Dissipative Energy Based Description for Hardening and Its Application toNon-proportional Cyclic Plasticity
     塑性耗散功的强化描述及其应用
短句来源
     Dynamic plastic response of rectangular plates with plastic energy dissipation by membrane force
     计入膜力塑性耗散效应的矩形板塑性动力响应
短句来源
     Cyclic plastic dissipated energy and fractional dimension methods are applied to lifetime prediction of zirconium and zircaloy-4. A power relationship is obtained between plastic dissipated energy, fractional dimension and fatigue lifetime.
     分别采用循环塑性耗散应变能法和分形维数法预测了材料的疲劳寿命,与Cofin-Manson法类似,循环塑性耗散能、分形维数与疲劳寿命之间均满足指数关系。
短句来源
     In respect of energy dissipation, a considerable portion of the input energy is transferred as rigid-body motion of the rotational beam.
     在能量耗散方面,输入的能量并不全部转化为塑性耗散能,至少有一部分输入能量要转化为动能。
短句来源
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  相似匹配句对
     Dissipative Energy Based Description for Hardening and Its Application toNon-proportional Cyclic Plasticity
     塑性耗散功的强化描述及其应用
短句来源
     Limit analysis and plastic dissipation power of landslides
     滑坡极限分析与塑性耗散功率
短句来源
     THE CHARACTERS OF THE DISSIPATIVE STRUCTURE
     耗散结构的特征
短句来源
     Quantum Mechanics in Dissipative Systems
     耗散系统的量子力学
短句来源
     PLASTIC DEFORMATION IN STEELS
     钢的塑性形变
短句来源
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  plastic dissipation
The rolling of the substrates on rollers allows control of the plastic dissipation during substrate bending and prevents dissipation associated with substrate unbending.
      
Mechanical analysis shows that control of plastic dissipation in substrates remains effective, as long as the ratio of the plate thickness to the roller radius is large enough to prevent wound-up.
      
The higher the strain rate sensitivity is, the larger amount of the external work is transformed into plastic dissipation energy than into cohesive energy, which delays the cohesive zone rupturing.
      
In this case, the plastic dissipation energy decreases and the cohesive dissipation energy increases which accelerates the cohesive zones debonding.
      
It is shown explicitly in the case of mode III that solutions with logarithmic singularity produce negative plastic dissipation in the plastic reloading sector.
      
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The low cycle fatigue behaviors of zirconium and zircaloy-4 at room temperature, 400℃ and 600℃ have been investigated. The macroscopic stress response curves show that the cyclic deformation behavior of hexagonal zirconium and zircaloy-4 is characterized by three stages of cyclic hardening, saturation and cyclic softening. Hexagonal metals are sensitive to loading history, just like plane-slip materials. Cyclic plastic dissipated energy and fractional dimension methods are applied to lifetime prediction of...

The low cycle fatigue behaviors of zirconium and zircaloy-4 at room temperature, 400℃ and 600℃ have been investigated. The macroscopic stress response curves show that the cyclic deformation behavior of hexagonal zirconium and zircaloy-4 is characterized by three stages of cyclic hardening, saturation and cyclic softening. Hexagonal metals are sensitive to loading history, just like plane-slip materials. Cyclic plastic dissipated energy and fractional dimension methods are applied to lifetime prediction of zirconium and zircaloy-4. A power relationship is obtained between plastic dissipated energy, fractional dimension and fatigue lifetime. The deformation mechanism analysis shows that the possible deformation modes of zirconium and its alloys include prismatic, pyramidal and basal slipping, and twinning.

研究了室温、400℃和600℃下锆及锆4合金的低周疲劳行为,其循环应力响应曲线表明:锆及锆4均表现为循环初期硬化,随后饱和,再逐渐软化。与平面状滑移材料类似,密排六方金属锆的循环变形行为对加载历史敏感。分别采用循环塑性耗散应变能法和分形维数法预测了材料的疲劳寿命,与Cofin-Manson法类似,循环塑性耗散能、分形维数与疲劳寿命之间均满足指数关系。循环变形机理分析表明,密排六方金属锆的疲劳变形方式包括:柱面滑移、锥面滑移、基面滑移和孪生,且其宏观应力响应曲线对加载历史较为敏感。

Low cycle fatigue lifetime curves of zirconium and zircaloy-4 at room temperature and 400 ℃ were measured, respectively. Cyclic plastic dissipated energy and fractal dimension of fracture surfaces are selected as damage variable to evaluate the fatigue lifetime. The accumulated formula of plastic dissipated energy is established on the basis of considering cyclic deformation character of zirconium and zircaloy-4. The test results indicate that the relationship between cyclic plastic dissipated energy and fatigue...

Low cycle fatigue lifetime curves of zirconium and zircaloy-4 at room temperature and 400 ℃ were measured, respectively. Cyclic plastic dissipated energy and fractal dimension of fracture surfaces are selected as damage variable to evaluate the fatigue lifetime. The accumulated formula of plastic dissipated energy is established on the basis of considering cyclic deformation character of zirconium and zircaloy-4. The test results indicate that the relationship between cyclic plastic dissipated energy and fatigue lifetime fits power law. Fractal analysis of fracture surface shows that the relationship between fractal dimension and fatigue lifetime can be also expressed as power law. An empirical formula describing the relationship between dissipated energy, fractal dimension and fatigue lifetime, D ≈ 0.027 lnN f + 1.099 ≈0.120 lnWpf- 0.025, is obtained, and their physical mechanism is discussed thermodynamically.

测定了纯Zr及Zr—4合金在室温和400℃下低周疲劳寿命曲线分别选用循环塑性耗散应变能和疲劳断回表面分形维数作为疲劳损伤参量,根据Zr及Zr-4合金表现为循环硬化、饱和、再软化三阶段的特征,建立了不同变形阶段的累积塑性耗散应变能表达式结果表明,不同塑性应变幅下循环塑性耗散应变能与疲劳寿命之间满足指数关系疲劳断口表面分形分析表明:分形维数与疲劳寿命之间也满足指数关系循环塑性耗散能、分形维数与疲劳寿命三者之间的定量关系为:D≈0.027lnNf+1.099≈0.120lnWpt-0.025,并从热力学角度对其物理背景作了初步探讨

Fatigue tests and transmission electron microscope(TEM) observation were performed to examine the characterization of microplasticity developed during high cycle fatigue in 2Cr13 steel.The specimens were being elasticity deformation under three special cycle loads before fatigue crack initiation and elastic modulus were not being changed.The characterization of local microplastic deformation was observed in specimens at half fatigue life cycles.There were many kinks in parallel screw dislocations and some screw...

Fatigue tests and transmission electron microscope(TEM) observation were performed to examine the characterization of microplasticity developed during high cycle fatigue in 2Cr13 steel.The specimens were being elasticity deformation under three special cycle loads before fatigue crack initiation and elastic modulus were not being changed.The characterization of local microplastic deformation was observed in specimens at half fatigue life cycles.There were many kinks in parallel screw dislocations and some screw dislocation meshes existed in a crisscross configuration.Prismatic loops and gliding loops were formed and piled up around M\-3C or M\-2C carbides in some areas.Dislocation cells were formed at some areas at fatigue life cycles.TEM observation of tensile test of the specimens after half life fraction revealed the mechanisms of the crack initiation and propagation.Microcracks initiated at carbides and propagated along the cell walls or the lath boundaries.The local microplasticity dissipation during high cycle fatigue had brought about local damage in 2Cr13 steel.It needed a little plastic work for the cracks growth through these damage regions.Characterization of Microplasticity Da mage Developed during High Cycle Fatigue in

研究了2Cr13马氏体不锈钢高周疲劳载荷作用下微观塑性变形的演变过程。在三种选定循环载荷作用下,在疲劳裂纹萌生前试样一直处于弹性变形阶段,而且弹性模量基本不变。在1/2寿命时,普遍观察到局部微观塑性变形特征。有些板条内存在含扭折对的平行螺位错束或十字交叉网状位错组态,一些细长碳化物周围塞积了棱柱或滑移型位错环。达到疲劳寿命时,有些区域内形成位错胞状结构。经过高周疲劳实验的薄膜试样在透射电镜下进行动态拉伸原位观察结果表明,微裂纹易在细长碳化物处萌生,沿位错胞壁或板条界扩展后与主裂纹汇合。高周疲劳过程中局部微观塑性耗散造成一定程度的微观结构损伤,裂纹穿过这些区域只需消耗很少的塑性功

 
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