Dynamic analysis of open cracked laminated composite beams

Ghoneam, S. M.

doi:10.1016/0263-8223(95)00023-2

Cited by 26 publications

(7 citation statements)

References 11 publications

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“…Okamura et.al. [16] ) and is obtained from [18] ; (11) In the present research, stiffness of crack, formulated by Okamura et.al, [16] is modified by introducing a term 2 0 L in the denominator to represent location of crack in the laminate (12).…”

Section: (A) (B) Figure 1 Geometry Specifications Of Bolt and Singlementioning

confidence: 99%

“…The complete effect of crack location, depth and length is incorporated into a single equation by adding (10) and (12)…”

Section: (A) (B) Figure 1 Geometry Specifications Of Bolt and Singlementioning

confidence: 99%

“…Cracks may also be caused by mechanical defects and some cracks occurring inside the material are generated during manufacturing process. In the available literature related to analysis of system with crack mostly experimental investigations are conducted to determine the displacement, deflection and frequency response [12][13][14][15]. Okamura et.al.…”

Section: Introductionmentioning

confidence: 99%

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Frequency and Stiffness Analysis of Cracked Bolted Composite Geometries under the Application of Shock Load

2017

IJMTER

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This work presents the development of an approximate analytical model to study the effect of application of shock loading on frequency response and stiffness of single lap multi bolted cracked composite laminates. These configurations are transformed into mass-spring systems and mathematical model is completed to determine natural frequency of bolted geometries. Analytical results are validated by comparing the results with Finite Element (FE) simulations run in ANSYS workbench. Conclusions reveal that changes in stiffness, because of increase in number of bolts and presence of cracks lead to reduction in fundamental frequency of the system. Therefore, this sensitive nature of frequency response can be used in modeling larger mechanical and aerospace structures.

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Section: (A) (B) Figure 1 Geometry Specifications Of Bolt and Singlementioning

confidence: 99%

“…The complete effect of crack location, depth and length is incorporated into a single equation by adding (10) and (12)…”

Section: (A) (B) Figure 1 Geometry Specifications Of Bolt and Singlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Frequency and Stiffness Analysis of Cracked Bolted Composite Geometries under the Application of Shock Load

2017

IJMTER

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“…Knibbs and Morris (1974) have studied the composite material properties by changing the fibre orientation. Ghoneam (1995) has worked on the vibration analysis of laminated composite cracked beam by changing the orientation of the laminated fibres. Li et al (2008) have studied the consequence of Poisson's ratio on change in the shape caused by bending and twisting of the FRP beam using FEM.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Study of Composite Cracked Beam by Changing the Angle of Bidirectional Fibres

Jena¹,

Parhi

Pohit

2016

Iran. J. Sci. Technol. Trans. Sci.

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Composite beam type structures fail in the presence of cracks. While in use the crack depth gradually increases, the structural stiffness decreases and as a result the beam becomes weaker than its earlier conditions. At the end, the beam may collapse because of an initial or developed small crack. Hence, identification of the crack and its severity is a challenge for researchers. In the present work, vibration signatures were used to detect the crack position as well as crack depth in a cracked FRP composite beam. Seven types of epoxy-glass fibres bidirectional (woven) composite beams made of 13 layers oriented along 0°, 7.5°, 15°, 22.5°, 30°, 37.5°and 45°with clamp-free end condition were studied. Fibre orientation effects on the FRP composite beam with varying crack location and crack depth were evaluated using analytical, finite element methods and Sugeno-fuzzy approach. The results were obtained and verified by experiments. The outcomes of all the methods were in good agreement. It was concluded that the natural frequency and mode shape in free vibration were largely affected by orientation of fibre and crack location and its depth.

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“…A number of researchers have also extended the free vibration models to include defects in composite structural elements. Following the free vibration analysis of homogeneous cracked beams performed by Shen [4] for Euler-Bernoulli beam theory, Ghoneam [5] developed a free vibration model for defective (cracked) composite beams. The mode plots for various end conditions revealed distinct slope changes at the crack location.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis of Cracked Stepped Laminated Composite Beams

Borneman

Hashemi

Alighanbari

2009

Int. J. Vehicle Structures and Systems

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The free vibration of piecewise uniform defective laminated composite beams is investigated. The governing differential equations of motion are coupled both in torsional and bending deformations. A Dynamic Finite Cracked Element (DFCE) is developed and is applied to slender beams, characterized by an offset between inertial and bending axes. The hybrid DFCE is a combination of the conventional Finite Element Method (FEM) formulation and frequencydependent interpolation functions stemmed from the exact Dynamic Stiffness Matrix (DSM) method. The defect, a through-thickness edge crack, is then represented by a set of stiffness terms evaluated from the beam compliance matrix at the crack location. A number of stepped beam configurations are investigated by reducing the base, thickness, or both. The natural frequencies and modes of free vibration of the beams are examined for single through-thickness edge crack configurations.

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Dynamic analysis of open cracked laminated composite beams

Cited by 26 publications

References 11 publications

Frequency and Stiffness Analysis of Cracked Bolted Composite Geometries under the Application of Shock Load

Frequency and Stiffness Analysis of Cracked Bolted Composite Geometries under the Application of Shock Load

Dynamic Study of Composite Cracked Beam by Changing the Angle of Bidirectional Fibres

Vibration Analysis of Cracked Stepped Laminated Composite Beams

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