Experimental studies on dynamic plastic buckling of circular cylindrical shells under axial impact

马宏伟,; 程国强,; 张善元,; 杨桂通,

doi:10.1007/bf02486155

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…The experimental results revealed the existence of two critical impact velocities that axisymmetric buckling or non-symmetric buckling modes occurred. These two critical impact velocities were also defined by Ming et al [10] and Hongwei et al [11], with similar studies to each other.…”

Section: Introductionmentioning

confidence: 84%

A numerical investigation of dynamic plastic buckling behaviour of thin-walled cylindrical structures with several geometries

Gümrük

2014

Thin-Walled Structures

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Section: Introductionmentioning

confidence: 84%

A numerical investigation of dynamic plastic buckling behaviour of thin-walled cylindrical structures with several geometries

Gümrük

2014

Thin-Walled Structures

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“…Currently, modal-based damage detection methods are widely studied as the global detection methods, such as frequency, mode shapes, flexibility matrix, curvature mode, strain mode, MAC, COMAC, ECOMAC and so on [1,2]. Vibration-based damage detection methods are especially attractive because they can realize online-global damage identification easily but avoid affecting the structural normal operation.…”

Section: Introductionmentioning

confidence: 99%

Structural Damage Detection of the Simple Beam Based on Responses Phase Space

Cheng¹,

Nie²,

Ma³

2012

AMR

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In this paper, the technology of attractor phase space in chaotic theory is introduced and applied in the structural damage detection. Firstly the phase plane is constructed with the displacement and acceleration responses. Using the changes of phase plane topology of intact and damaged responses, a new damage index is extracted, and the structural damage existence and severity are identified successfully. Since some of the state variables can not be measured, a method of phase space reconstruction is proposed using single dynamic response. The dynamic responses are directly displayed into phase space, realizing transforming the signals from time domain to space domain. Then using the reconstructed phase space, the damage is diagnosed. The results indicate that the phase space reconstruction method has good robustness to noise, and higher sensitivity compared with traditional modal-based methods. The phase space reconstruction method can calculate the value of the damage index using single dynamic response, so that a single sensor can monitor structural damage existence and severity.

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“…Initial cracks in the principle axis, which may be formed in the manufacturing process and during service, will propagate and grow under working conditions and may threaten the safety performance of the system, even cause failure. Early identification of cracks, before the propagation and causing failure, is therefore of great interest [1,2].…”

Section: Introductionmentioning

confidence: 99%

Identification of Crack Parameters in a Cantilever Beam under Uncertain End Conditions

Wang

Jing

Zhang³

et al. 2009

KEM

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The local effect of “softening” at the crack location can be simulated by an equivalent spring connecting the two segments of the beam. As modelling the crack, the non-perfectly rigid clamp is also simulated as a torsional spring of unknown stiffness. Combined with the Bernoulli-Euler theories of beam, the present model is applied to derive the characteristic equation of the cantilever beam under uncertain end conditions related to the crack parameters, namely, the location and the depth of the crack. Based on this characteristic equation, an accurate crack identification method is developed to identify the location and the depth of the crack by minimizing the difference between the analytical and experimental frequency values. The proposed approach is verified by two cantilever beam experiments under ideal boundary conditions and uncertain end conditions. It is found that the location and the depth of the crack can be worked out when at least three natural frequencies are known. For crack identification of the cantilever beam under uncertain end conditions, the identified crack location of the proposed approach is more accurate than the Narkis’ method. Furthermore, the crack depth can also be obtained by the present method.

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Experimental studies on dynamic plastic buckling of circular cylindrical shells under axial impact

Cited by 6 publications

References 5 publications

A numerical investigation of dynamic plastic buckling behaviour of thin-walled cylindrical structures with several geometries

A numerical investigation of dynamic plastic buckling behaviour of thin-walled cylindrical structures with several geometries

Structural Damage Detection of the Simple Beam Based on Responses Phase Space

Identification of Crack Parameters in a Cantilever Beam under Uncertain End Conditions

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