A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nonlinear vibration analysis of fiber reinforced composite cylindrical shells with partial constrained layer damping treatment
Abstract This research proposes a novel analytical model capable of accurately predicting the strain-dependent characteristics of fiber reinforced composite shells (FRCSs) with partial constrained layer damping (CLD) treatment by considering the nonlinearities of fiber reinforced composite and viscoelastic materials simultaneously. The nonlinear material properties are represented based on Jones-Nelson nonlinear theory, energy-based strain energy method, and complex modulus method. Then, the governing equations of motion for FRCSs are developed via Ritz method, and the identification procedure of nonlinear fitting parameters is also presented. By taking a T300 carbon fiber/epoxy resin cylindrical shell with partial CLD patches as an example, a series of experiments are carried out to validate the proposed modeling approach. Finally, the effects of material properties on nonlinear vibration behaviors of FRCSs covered with partial CLD patches are evaluated. Comparisons show that the proposed nonlinear model is more accuracy than that without considering strain dependence, where the maximum errors between the proposed model and measured data for natural frequencies, damping ratios and resonant response are 6.9%, 11.3%, and 11.2%, respectively.
Highlights Natural frequencies, damping ratios, and response of FRCSs with CLD treatment are predicted. Material model accounting for strain-dependent nonlinearity is proposed. Vibration tests are conducted on a FRCS specimen to validate the proposed model. Material nonlinearity causes softening behavior of natural frequencies and resonant response. Modal damping ratios increase along with increment of excitation level.
Nonlinear vibration analysis of fiber reinforced composite cylindrical shells with partial constrained layer damping treatment
Abstract This research proposes a novel analytical model capable of accurately predicting the strain-dependent characteristics of fiber reinforced composite shells (FRCSs) with partial constrained layer damping (CLD) treatment by considering the nonlinearities of fiber reinforced composite and viscoelastic materials simultaneously. The nonlinear material properties are represented based on Jones-Nelson nonlinear theory, energy-based strain energy method, and complex modulus method. Then, the governing equations of motion for FRCSs are developed via Ritz method, and the identification procedure of nonlinear fitting parameters is also presented. By taking a T300 carbon fiber/epoxy resin cylindrical shell with partial CLD patches as an example, a series of experiments are carried out to validate the proposed modeling approach. Finally, the effects of material properties on nonlinear vibration behaviors of FRCSs covered with partial CLD patches are evaluated. Comparisons show that the proposed nonlinear model is more accuracy than that without considering strain dependence, where the maximum errors between the proposed model and measured data for natural frequencies, damping ratios and resonant response are 6.9%, 11.3%, and 11.2%, respectively.
Highlights Natural frequencies, damping ratios, and response of FRCSs with CLD treatment are predicted. Material model accounting for strain-dependent nonlinearity is proposed. Vibration tests are conducted on a FRCS specimen to validate the proposed model. Material nonlinearity causes softening behavior of natural frequencies and resonant response. Modal damping ratios increase along with increment of excitation level.
Nonlinear vibration analysis of fiber reinforced composite cylindrical shells with partial constrained layer damping treatment
Li, Hui (author) / Wang, Ziheng (author) / Lv, Haiyu (author) / Zhou, Zhengxue (author) / Han, Qingkai (author) / Liu, Jinguo (author) / Qin, Zhaoye (author)
Thin-Walled Structures ; 157
2020-07-25
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2011
| British Library Online Contents | 2004