A structure with periodic dynamic load may lead to dynamic instability due to parametric resonance. In the present work, the dynamic stability analysis of laminated composite and sandwich plate due to in-plane periodic loads is studied based on recently developed inverse trigonometric zigzag theory (ITZZT). Transverse shear stress continuity at layer interfaces along with traction-free boundary conditions on the plate surfaces is satisfied by the model obviating the need of shear correction factor. An efficient C0 continuous, eight noded isoparametric element with seven field variable is employed for the dynamic stability analysis of laminated composite and sandwich plates. The boundaries of instability regions are determined using Bolotin's approach and the first instability zone is presented either in the nondimensional load amplitude–excitation frequency plane or load amplitude–load frequency plane. The influences of various parameters such as degrees of orthotropy, span-thickness ratios, boundary conditions, static load factors, and thickness ratios on the dynamic instability regions (DIRs) are studied by solving a number of problems. The evaluated results are validated with the available results in the literature based on different deformation theories. The efficiency of the present model is ascertained by the improved accuracy of predicted results at the cost of less computational involvement.
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December 2015
Research-Article
Dynamic Instability of Laminated-Composite and Sandwich Plates Using a New Inverse Trigonometric Zigzag Theory
Rosalin Sahoo,
Rosalin Sahoo
Department of Aerospace Engineering,
e-mail: sahoorosalin7@gmail.com
Indian Institute of Technology Kharagpur
,Kharagpur 721302
, India
e-mail: sahoorosalin7@gmail.com
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B. N. Singh
B. N. Singh
1
Professor
Department of Aerospace Engineering,
e-mail: bnsingh@aero.iitkgp.ernet.in
Department of Aerospace Engineering,
Indian Institute of Technology Kharagpur
,Kharagpur 721302
, India
e-mail: bnsingh@aero.iitkgp.ernet.in
1Corresponding author.
Search for other works by this author on:
Rosalin Sahoo
Department of Aerospace Engineering,
e-mail: sahoorosalin7@gmail.com
Indian Institute of Technology Kharagpur
,Kharagpur 721302
, India
e-mail: sahoorosalin7@gmail.com
B. N. Singh
Professor
Department of Aerospace Engineering,
e-mail: bnsingh@aero.iitkgp.ernet.in
Department of Aerospace Engineering,
Indian Institute of Technology Kharagpur
,Kharagpur 721302
, India
e-mail: bnsingh@aero.iitkgp.ernet.in
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received July 3, 2014; final manuscript received May 7, 2015; published online July 9, 2015. Assoc. Editor: Mohammed Daqaq.
J. Vib. Acoust. Dec 2015, 137(6): 061001 (12 pages)
Published Online: December 1, 2015
Article history
Received:
July 3, 2014
Revision Received:
May 7, 2015
Online:
July 9, 2015
Citation
Sahoo, R., and Singh, B. N. (December 1, 2015). "Dynamic Instability of Laminated-Composite and Sandwich Plates Using a New Inverse Trigonometric Zigzag Theory." ASME. J. Vib. Acoust. December 2015; 137(6): 061001. https://doi.org/10.1115/1.4030716
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