Mechanics of Transverse Impact in Fiber Composite Plates and Cylinders

The problem of impact loading of fiber composite structures is important because of the possibility of accidental damage occuring during service. The present paper is a review of a combined experimental and analytical study of transverse impact loading of carbon/epoxy composite plates and cylinders. Scaling of response with structure size was investigated as part of the program. Analysis procedures for dynamic response were developed, using Ritz techniques for plates and Fourier series expansions combined with Laplace transforms for the cylinders. The experimental results showed good correlation with scaling rules developed for structural response. Good agreement was also obtained between experiment and analysis for surface strain response in both the plates and the cylinders. Scaling of damage is seen to be more complicated, with measured delamination sizes exhibiting a dependence on absolute specimen size as would be predicted by fracture mechanics.

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Edge effects in laminated fiber composite plates subjected to in plane loading

10.2514/6.1989-1402 ◽

1989 ◽

Author(s):

THOMAS BOCKRATH ◽

RICHARD NELSON

Keyword(s):

Edge Effects ◽

Fiber Composite ◽

Composite Plates

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Stiffened CFRP-Panels Under Buckling Loads: Modeling, Analysis, Optimization

Volume 1: 21st Design Automation Conference ◽

10.1115/detc1995-0031 ◽

1995 ◽

Author(s):

Hans A. Eschenauer ◽

Christof M. Weber

Keyword(s):

Structural Analysis ◽

Structural Optimization ◽

Fiber Composite ◽

Composite Plates ◽

Optimization Process ◽

Optimal Layout ◽

Buckling Loads ◽

Whole Process ◽

Modeling Analysis ◽

Complete Optimization

Abstract The present paper addresses the optimal layout of stiffened fiber composite plates (Fig. 1) considering buckling constraints; these plates are increasingly applied in many fields of engineering (air- and spacecraft technology, automotive industries, boatbuilding etc.). This particular area of structural optimization still requires substantial investigations into its fundamentals. The structural analysis alone for the treatment of this type of problems may increase to such a degree that the complete optimization process requires extremely long computation times due to the processing of a high amount of data, a fact that calls for the development of “intelligent” procedures in order to reduce the computation effort to a tolerable measure and to maintain reduplicability of the whole process. For this purpose, a so-called “constructive design model” is introduced.

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Surface Cracks in Thick Laminated Fiber Composite Plates

Surface-Crack Growth: Models, Experiments, and Structures ◽

10.1520/stp23434s ◽

2009 ◽

pp. 177-177-17 ◽

Cited By ~ 1

Author(s):

SN Chatterjee

Keyword(s):

Fiber Composite ◽

Composite Plates ◽

Surface Cracks

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Genetic Optimization of Machining Parameters Affecting Thrust Force during Drilling of Pineapple Fiber Composite Plates – an Experimental Approach

Journal of Natural Fibers ◽

10.1080/15440478.2020.1788484 ◽

2020 ◽

pp. 1-12

Author(s):

J. Lilly Mercy ◽

P. Sivashankari ◽

M. Sangeetha ◽

K.R. Kavitha ◽

S. Prakash

Keyword(s):

Experimental Approach ◽

Thrust Force ◽

Fiber Composite ◽

Composite Plates ◽

Machining Parameters ◽

Genetic Optimization

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Structural Health Monitoring of Composite Plates Subjected to Impacts Using the Electromechanical Impedance Technique

Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2 ◽

10.1115/smasis2008-514 ◽

2008 ◽

Cited By ~ 1

Author(s):

Karina M. Tsuruta ◽

Leandro R. Cunha ◽

Raquel S. L. Rade ◽

Domingos A. Rade

Keyword(s):

Structural Health Monitoring ◽

Impact Energy ◽

Health Monitoring ◽

Fiber Composite ◽

Composite Plates ◽

Carbon Fiber Composite ◽

Monitoring Method ◽

Electromechanical Impedance ◽

Structural Health ◽

Functional Relations

The aim of this paper is to evaluate the use of the Structural Health Monitoring (SHM) technique based on the concept of electromechanical impedance for the assessment of low-energy impact damage in laminated carbon-fiber composite plates. The experiments were carried-out by using an especially designed pendulum, and were planned in such a way to accommodate a range of test conditions, such as impact energy and dimension of the impacting piece. Also, it was investigated the influence of the frequency band in which the impedance functions are measured. Additionally, statistical metamodels were built aiming at establishing functional relations between the values of the damage metric and impact energy for single and multiple impacts. The obtained results demonstrate the capability of the monitoring method to identify various damage levels corresponding to different impact conditions.

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