The Use of Layered Composites for Passive Vibration Damping

2011 ◽  
pp. 289-298 ◽  
Author(s):  
C. E. Lord ◽  
J. A. Rongong ◽  
A. Hodzic
Keyword(s):  
Vibration Damping ◽  
Layered Composites

Determination of the transverse shear stress in layered composites

2020 ◽  
Vol 86 (2) ◽  
pp. 44-53
Author(s):  
Yu. I. Dudarkov ◽  
M. V. Limonin
Keyword(s):  
Shear Stress ◽  
Transverse Shear ◽  
Composite Beam ◽  
Layered Composite ◽  
Equivalent Model ◽  
Shear Stresses ◽  
Transverse Shear Stress ◽  
Layered Composites ◽  
Laminate Composites ◽  
Transverse Shear Stresses

An engineering approach to estimation of the transverse shear stresses in layered composites is developed. The technique is based on the well-known D. I. Zhuravsky equation for shear stresses in an isotropic beam upon transverse bending. In general, application of this equation to a composite beam is incorrect due to the heterogeneity of the composite structure. According to the proposed method, at the first stage of its implementation, a transition to the equivalent model of a homogeneous beam is made, for which the Zhuravsky formula is valid. The transition is carried out by changing the shape of the cross section of the beam, provided that the bending stiffness and generalized elastic modulus remain the same. The calculated shear stresses in the equivalent beam are then converted to the stress values in the original composite beam from the equilibrium condition. The main equations and definitions of the method as well as the analytical equation for estimation of the transverse shear stress in a composite beam are presented. The method is verified by comparing the analytical solution and the results of the numerical solution of the problem by finite element method (FEM). It is shown that laminate stacking sequence has a significant impact both on the character and on the value of the transverse shear stress distribution. The limits of the applicability of the developed technique attributed to the conditions of the validity of the hypothesis of straight normal are considered. It is noted that under this hypothesis the shear stresses do not depend on the layer shear modulus, which explains the absence of this parameter in the obtained equation. The classical theory of laminate composites is based on the similar assumptions, which gives ground to use this equation for an approximate estimation of the transverse shear stresses in in a layered composite package.

Passive Vibration Damping Materials: Piezoelectric Ceramic Composites for Vibration Damping Applications.

1995 ◽  
Author(s):  
Shoko Yoshikawa ◽  
R. Meyer ◽  
J. Witham ◽  
S. Y. Agadda ◽  
G. Lesieutre
Keyword(s):  
Piezoelectric Ceramic ◽  
Ceramic Composites ◽  
Vibration Damping ◽  
Damping Materials

scholarly journals Design of Eccentric Mass-Type Vibration-Damping Electric Actuator Control System for Non-Fixed-Wing Aircraft

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 219415-219429
Author(s):  
Zhenyang Hao ◽  
Tao Wang ◽  
Xin Cao ◽  
Qiyao Zhang
Keyword(s):  
Control System ◽  
Vibration Damping ◽  
Electric Actuator ◽  
Actuator Control ◽  
Mass Type
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