TY  - JOUR
AU  - Zhou, Yadong
AU  - Hang, Xiaochen
AU  - Wu, Shaoqing
AU  - Fei, Qingguo
AU  - Trišović, Nataša
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2546
AB  - The panel-type structures used in aerospace engineering can be subjected to severe high-frequency acoustic loadings in service. This paper evaluates the frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites (CMCs) under acoustic loadings. Firstly, the high-frequency random responses from the broadband random excitation will result in more stress cycles in a definite period of time. The probability density distributions of stress amplitudes will be different in different frequency band-widths, though the peak stress estimations are identical. Secondly, the fatigue properties of CMCs can be highly frequency-dependent. The fatigue evaluation method for the random vibration case is adopted to evaluate the fatigue damage of a representative stiffened panel structure. The frequency effect through S-N curves on random fatigue damage is numerically verified. Finally, a parameter is demonstrated to characterize the mean vibration frequency of a random process, and hence this parameter can further be considered as a reasonable loading frequency in the fatigue tests of CMCs to obtain more reliable S-N curves. Therefore, the influence of vibration frequency can be incorporated in the random fatigue model from the two perspectives.
PB  - Springer, New York
T2  - Acta Mechanica Solida Sinica
T1  - Frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites
EP  - 173
IS  - 2
SP  - 165
VL  - 30
DO  - 10.1016/j.camss.2017.03.010
ER  - 

@article{
author = "Zhou, Yadong and Hang, Xiaochen and Wu, Shaoqing and Fei, Qingguo and Trišović, Nataša",
year = "2017",
abstract = "The panel-type structures used in aerospace engineering can be subjected to severe high-frequency acoustic loadings in service. This paper evaluates the frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites (CMCs) under acoustic loadings. Firstly, the high-frequency random responses from the broadband random excitation will result in more stress cycles in a definite period of time. The probability density distributions of stress amplitudes will be different in different frequency band-widths, though the peak stress estimations are identical. Secondly, the fatigue properties of CMCs can be highly frequency-dependent. The fatigue evaluation method for the random vibration case is adopted to evaluate the fatigue damage of a representative stiffened panel structure. The frequency effect through S-N curves on random fatigue damage is numerically verified. Finally, a parameter is demonstrated to characterize the mean vibration frequency of a random process, and hence this parameter can further be considered as a reasonable loading frequency in the fatigue tests of CMCs to obtain more reliable S-N curves. Therefore, the influence of vibration frequency can be incorporated in the random fatigue model from the two perspectives.",
publisher = "Springer, New York",
journal = "Acta Mechanica Solida Sinica",
title = "Frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites",
pages = "173-165",
number = "2",
volume = "30",
doi = "10.1016/j.camss.2017.03.010"
}

Zhou, Y., Hang, X., Wu, S., Fei, Q.,& Trišović, N.. (2017). Frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites. in Acta Mechanica Solida Sinica
Springer, New York., 30(2), 165-173.
https://doi.org/10.1016/j.camss.2017.03.010

Zhou Y, Hang X, Wu S, Fei Q, Trišović N. Frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites. in Acta Mechanica Solida Sinica. 2017;30(2):165-173.
doi:10.1016/j.camss.2017.03.010 .

Zhou, Yadong, Hang, Xiaochen, Wu, Shaoqing, Fei, Qingguo, Trišović, Nataša, "Frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites" in Acta Mechanica Solida Sinica, 30, no. 2 (2017):165-173,
https://doi.org/10.1016/j.camss.2017.03.010 . .

TY  - JOUR
AU  - Zhou, Yadong
AU  - Wu, Shaoqing
AU  - Trišović, Nataša
AU  - Fei, Qingguo
AU  - Tan, Zhiyong
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2356
AB  - Design optimization of dynamic properties, for example, modal frequencies, can be of much importance when structures are exposed to the shock and/or vibration environments. A modal strain based method is proposed for fast design of natural frequencies of plate-like structures. The basic theory of modal strains of thin plates is reviewed. The capability of determining the highly sensitive elements by means of modal strain analysis is theoretically demonstrated. Finite element models were constructed in numerical simulations. Firstly, the application of the proposed method is conducted on a central-massed flat plate which was topologically optimized by the Reference. The results of modal strain analysis at the first mode have good agreement with the results from the topology optimization. Furthermore, some features of the strain mode shapes (SMSs) of the flat plate are investigated. Finally, the SMSs are applied to the optimization of a stiffened plate. Attention is focused on the distributions of the SMSs of the stiffeners, which also shows good agreement with the results from the topology optimization in the previous study. Several higher orders of SMSs are extracted, which can visualize the most sensitive elements to the corresponding modal frequency. In summary, both the theory and simulations validate the correctness and convenience of applying SMSs to dynamic design of plate-like structures.
PB  - Hindawi Ltd, London
T2  - Shock and Vibration
T1  - Modal Strain Based Method for Dynamic Design of Plate-Like Structures
VL  - 2016
DO  - 10.1155/2016/2050627
ER  - 

@article{
author = "Zhou, Yadong and Wu, Shaoqing and Trišović, Nataša and Fei, Qingguo and Tan, Zhiyong",
year = "2016",
abstract = "Design optimization of dynamic properties, for example, modal frequencies, can be of much importance when structures are exposed to the shock and/or vibration environments. A modal strain based method is proposed for fast design of natural frequencies of plate-like structures. The basic theory of modal strains of thin plates is reviewed. The capability of determining the highly sensitive elements by means of modal strain analysis is theoretically demonstrated. Finite element models were constructed in numerical simulations. Firstly, the application of the proposed method is conducted on a central-massed flat plate which was topologically optimized by the Reference. The results of modal strain analysis at the first mode have good agreement with the results from the topology optimization. Furthermore, some features of the strain mode shapes (SMSs) of the flat plate are investigated. Finally, the SMSs are applied to the optimization of a stiffened plate. Attention is focused on the distributions of the SMSs of the stiffeners, which also shows good agreement with the results from the topology optimization in the previous study. Several higher orders of SMSs are extracted, which can visualize the most sensitive elements to the corresponding modal frequency. In summary, both the theory and simulations validate the correctness and convenience of applying SMSs to dynamic design of plate-like structures.",
publisher = "Hindawi Ltd, London",
journal = "Shock and Vibration",
title = "Modal Strain Based Method for Dynamic Design of Plate-Like Structures",
volume = "2016",
doi = "10.1155/2016/2050627"
}

Zhou, Y., Wu, S., Trišović, N., Fei, Q.,& Tan, Z.. (2016). Modal Strain Based Method for Dynamic Design of Plate-Like Structures. in Shock and Vibration
Hindawi Ltd, London., 2016.
https://doi.org/10.1155/2016/2050627

Zhou Y, Wu S, Trišović N, Fei Q, Tan Z. Modal Strain Based Method for Dynamic Design of Plate-Like Structures. in Shock and Vibration. 2016;2016.
doi:10.1155/2016/2050627 .

Zhou, Yadong, Wu, Shaoqing, Trišović, Nataša, Fei, Qingguo, Tan, Zhiyong, "Modal Strain Based Method for Dynamic Design of Plate-Like Structures" in Shock and Vibration, 2016 (2016),
https://doi.org/10.1155/2016/2050627 . .