Dynamic Characteristics of Composite Laminates

1994 ◽  
pp. 128-144
Author(s):  
S. V. Kulkarni ◽  
N. J. Pagano
Keyword(s):  
Dynamic Characteristics ◽  
Composite Laminates

Stability analysis in wound composite material axial impeller

2011 ◽  
Vol 226 (5) ◽  
pp. 1162-1172 ◽  
Author(s):  
J Wang ◽  
J Piechna ◽  
J A O Yume ◽  
N Müller
Keyword(s):  
Composite Material ◽  
Stability Analysis ◽  
Dynamic Characteristics ◽  
Composite Laminates ◽  
High Performance ◽  
Low Cost ◽  
Modal Shape ◽  
Element Analysis ◽  
Rotating Speed ◽  
Wound Composite

A stability analysis is developed to assess the stresses and dynamic characteristics of the wound composite material axial impeller under centrifugal force loading conditions. This procedure is based on finite element analysis (commercial software ABAQUS) results. A low-cost, light-weight, high-performance composite turbomachinery impeller with a uniquely designed blade patterns is evaluated. Understanding the stress–strain behaviour of fibre-reinforced composite laminates as it relates to ultimate failure and the ability to predict ultimate strength is critical in the design of safe and lightweight impellers. To determine failures, the maximum stress failure criterion is used. In order to avoid operating at resonance, which can make impellers suffer a significant reduction in the design life, the designer must calculate the natural frequency and modal shape of the impeller to analyse the dynamic characteristics. The results show that using composite Kevlar fibre/epoxy matrix enables the impeller to run at a rotating speed 2228 rad/s and withstand the stresses, no critical speed will be matched during start-up and shut-down, and that mass imbalances of the impeller shall not pose a critical problem.

Dynamic characteristics of thermoplastic composite laminates

Composites ◽  
1994 ◽  
Vol 25 (4) ◽  
pp. 281-286 ◽  
Author(s):  
I. Lee ◽  
B.N. Kim ◽  
K.N. Koo
Keyword(s):  
Dynamic Characteristics ◽  
Composite Laminates ◽  
Thermoplastic Composite

Stress and Vibration Analysis for Woven Composite Axial Impeller

2010 ◽  
Author(s):  
Jifeng Wang ◽  
Jorge Olortegui-Yume ◽  
Norbert Mu¨ller
Keyword(s):  
Dynamic Characteristics ◽  
Composite Laminates ◽  
Vibration Analysis ◽  
High Performance ◽  
Fiber Composite ◽  
Low Cost ◽  
Woven Composite ◽  
Modal Shape ◽  
Element Analysis ◽  
Strain Behavior

A stress and vibration analysis procedure is developed to assess the static and dynamic characteristics of the Woven Composite Axial-Impeller under loading conditions particular to centrifugal force. This procedure is based on Finite Element Analysis (FEA, commercial software ABAQUS) results. A low-cost, light-weight, high-performance, composite turbomachinery impeller with uniquely designed blade patterns are evaluated. Understanding the stress-strain behavior of fiber composite laminates to ultimate failure and the ability to predict ultimate strength is critical in the design of safe and lightweight impellers. To determine failures, the maximum stress failure criterion is used. In order to avoid resonance which can make impellers suffer a significant reduction in the design life, the designer must calculate the natural frequency and modal shape of impeller to analyze the dynamic characteristics. The results show that composite material Kevlar fiber/epoxy matrix enables the impeller to run at high tip speed of 450m/s and withstand the stresses; no critical speed will be matched during start-up and shut-down and that mass imbalances of the impeller shall not pose a critical problem.

scholarly journals Dynamic Characteristics of Specialty Composite Structures with Embedded Damping Layers

1995 ◽  
Vol 117 (1) ◽  
pp. 62-69 ◽  
Author(s):  
D. A. Saravanos ◽  
J. M. Pereira
Keyword(s):  
Dynamic Characteristics ◽  
Fiber Orientation ◽  
Composite Laminates ◽  
Composite Structures ◽  
Structural Damping ◽  
Cross Sectional ◽  
Parametric Studies ◽  
Damping Theory ◽  
Discrete Layer ◽  
Unique Capability

Damping mechanics for predicting the damped dynamic characteristics in specialty composite structures with compliant interlaminar damping layers are presented. Finite-element based mechanics incorporating a discrete layer (or layer-wise) laminate damping theory are utilized to represent general laminate configurations in terms of lay-up and fiber orientation angles, cross-sectional thickness, shape and boundary conditions. Evaluations of the method with exact solutions and experimental data illustrate its accuracy. Additional parametric studies demonstrate the unique capability of angle-ply composite laminates with cocured interlaminar damping layers to significantly enhance structural damping.

Dynamic characteristics of composite laminates

1972 ◽  
Vol 23 (1) ◽  
pp. 127-143 ◽  
Author(s):  
S.V. Kulkarni ◽  
N.J. Pagano
Keyword(s):  
Dynamic Characteristics ◽  
Composite Laminates
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