A three-dimensional semi-analytical model for the composite laminated plates with a stepped lap repair

2011 ◽  
Vol 93 (7) ◽  
pp. 1673-1682 ◽  
Author(s):  
Dinghe Li ◽  
Guanghui Qing ◽  
Yanhong Liu
Keyword(s):  
Analytical Model ◽  
Three Dimensional ◽  
Laminated Plates ◽  
Composite Laminated Plates

scholarly journals On Interlaminar Failure due to Mechanical and Thermal Stresses at the Free Edges of Composite Laminated Plates

1994 ◽  
Vol 3 (5) ◽  
pp. 096369359400300
Author(s):  
S. K. Morton ◽  
J. P. H. Webber
Keyword(s):  
Stress Field ◽  
Analytical Model ◽  
Thermal Stresses ◽  
Three Dimensional ◽  
Free Edge ◽  
Laminated Plates ◽  
Laminated Plate ◽  
Composite Laminated Plate ◽  
Composite Laminated Plates ◽  
Thermoelastic Effects

The three-dimensional stress field that occurs near a free edge in a composite laminated plate may lead to interlaminar failure. On the basis of an analytical model for this stress field, critical applied loads for interlaminar failure are predicted using a quadratic criterion. Both mechanical and thermoelastic effects are considered.

Approximate Design Analysis of Failure Within Composite Laminated Plates

1982 ◽  
Vol 104 (3) ◽  
pp. 604-611 ◽  
Author(s):  
R. L. Gallo ◽  
A. N. Palazotto
Keyword(s):  
Computer Simulation ◽  
Analytical Study ◽  
Three Dimensional ◽  
Free Edge ◽  
Laminated Plates ◽  
Curing Temperature ◽  
Laminated Plate ◽  
Approximate Design ◽  
Composite Laminated Plates ◽  
Good Agreement

This paper is an analytical study of the effects of interlamina stresses near the free edge of a laminated plate due to axial and moment loading variations. A three-dimensional extension of the Tsai-Hill failure criterion is introduced to predict delamination. Results achieved by computer simulation show good agreement with experimental observations made by other sources. The distance from the free edge is decidedly important as is the effect of curing temperature because of the consequences these parameters have on the magnitude of the stress field. The failure estimations provide an approximate bound and are worthy of due consideration by the design engineer in the stress analysis of test specimens.

Nonlinear Vibrations of Two-Span Composite Laminated Plates with Equal and Unequal Subspan Lengths

2017 ◽  
Vol 9 (6) ◽  
pp. 1485-1505
Author(s):  
Lingchang Meng ◽  
Fengming Li
Keyword(s):  
Multiple Scales ◽  
Equations Of Motion ◽  
Primary Resonance ◽  
Laminated Plates ◽  
Laminated Plate ◽  
Composite Laminated Plate ◽  
Vibration Localization ◽  
Composite Laminated Plates ◽  
Localization Phenomenon ◽  
Harmonic Resonance

AbstractThe nonlinear transverse vibrations of ordered and disordered two-dimensional (2D) two-span composite laminated plates are studied. Based on the von Karman's large deformation theory, the equations of motion of each-span composite laminated plate are formulated using Hamilton's principle, and the partial differential equations are discretized into nonlinear ordinary ones through the Galerkin's method. The primary resonance and 1/3 sub-harmonic resonance are investigated by using the method of multiple scales. The amplitude-frequency relations of the steady-state responses and their stability analyses in each kind of resonance are carried out. The effects of the disorder ratio and ply angle on the two different resonances are analyzed. From the numerical results, it can be concluded that disorder in the length of the two-span 2D composite laminated plate will cause the nonlinear vibration localization phenomenon, and with the increase of the disorder ratio, the vibration localization phenomenon will become more obvious. Moreover, the amplitude-frequency curves for both primary resonance and 1/3 sub-harmonic resonance obtained by the present analytical method are compared with those by the numerical integration, and satisfactory precision can be obtained for engineering applications and the results certify the correctness of the present approximately analytical solutions.

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