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时间相关载荷
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     The Related Research of Time Management Disposition
     时间管理倾向的相关研究
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     The time-dependent spectra of photoeleotron are calculated.
     计算了光电子的时间相关谱.
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     Time History of Spur Gear Root Stress under Moving Load
     移动载荷下齿根应力的时间历程
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  time-dependent load
Stochastic analysis for time-dependent load transfer in reinforced concrete columns
      
Delayed Fracture of a Laminated Viscoelastic Plate with a Through Crack under a Time-Dependent Load
      
The delayed fracture of a viscoelastic plate with a rectilinear mode I crack under a time-dependent load is studied.
      
Long-term failure of a layered viscoelastic composite material with a crack under a time-dependent load
      
This figure shows time-dependent load relaxation curves for each increasing load step from 5000 to 25 000 lb.
      


From the point of view of dynamical system, the stability of viscoelastic rectangular plates with the simply-supported edges on a viscoelastic foundation is studied. The creep critical load λcr and the instantaneous critical load λcs are calculated by means of Laplace transformation. Furthermore, the deflections for the linearized problem and non-linear problem are obtained respectively with the help of Laplace transformation and Galerkin method when the maximum value λ* of the time-dependent periodic load λ(t)...

From the point of view of dynamical system, the stability of viscoelastic rectangular plates with the simply-supported edges on a viscoelastic foundation is studied. The creep critical load λcr and the instantaneous critical load λcs are calculated by means of Laplace transformation. Furthermore, the deflections for the linearized problem and non-linear problem are obtained respectively with the help of Laplace transformation and Galerkin method when the maximum value λ* of the time-dependent periodic load λ(t) satisfies the condition λcr≤λ*≤cs.

根据动力系统的观点研究了四边简支粘弹性矩形板的稳定性.利用Laplace变换得到了蠕变临界载荷λcr和瞬时临界载荷λcs.同时采用Laplace变换和Galerkin方法计算了时间相关载荷λ(t)的峰值λ满足条件λcr<A<λcs时,线性和非线性问题的挠度随时间的变化规律.

There exists neither accurate solution nor universal engineering one for the creep fracture parameter of the elastic-power-law creep cracked body under unsteady creep condition. Establishing an EPRI engineering approach for the elastic-plastic fracture mechanics in the creep crack analysis, this paper has proposed the engineering estimation formulae for the transient crack tip J integral, C integral, far-field J integral and load-line displacement for the unsteady creep. The proposed engineering approach is...

There exists neither accurate solution nor universal engineering one for the creep fracture parameter of the elastic-power-law creep cracked body under unsteady creep condition. Establishing an EPRI engineering approach for the elastic-plastic fracture mechanics in the creep crack analysis, this paper has proposed the engineering estimation formulae for the transient crack tip J integral, C integral, far-field J integral and load-line displacement for the unsteady creep. The proposed engineering approach is validated by the finite element method for the single-edge-cracked plate of plane strain subjected to the time-dependent tension. The results show that in the whole range from the small-scale creep to the steady one, the proposed engineering solutions are well consistent with those by finite element method with the maximum deviation about 0.5%. Therefore, the proposed engineering approach exhibits a higher accuracy, at least from the engineering application viewpoint.

推广弹塑性断裂力学的 EPRI.工程分析方法用于蠕变裂纹分析,建立了弹性-幂律蠕变 材料裂纹体在非稳态蠕变条件下的J积分、C积分和载荷线位移的工程估算公式.以受均匀 拉伸的平面应变单边裂纹板为例,对若干种典型的时间相关载荷,与有限元解进行了比较、结 果表明,工程估算公式具有相当高的精度

 
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