Limit surfaces for fibrous composite plates

AIAA Journal ◽  
1970 ◽  
Vol 8 (12) ◽  
pp. 2136-2140 ◽  
Author(s):  
P. V. McLAUGHLIN ◽  
S. C. BATTERMAN
Keyword(s):  
Fibrous Composite ◽  
Composite Plates

The Effects on Critical Load of Metal-Matrix Composite Plates With a Hole Under In-Plane Loadings

2001 ◽  
Author(s):  
F. Okumuş ◽  
A. Turgut
Keyword(s):  
Critical Load ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Numerical Solutions ◽  
Fibrous Composite ◽  
Plate Thickness ◽  
Mathematical Formulation ◽  
Shear Deformation Theory ◽  
Composite Plates

Abstract Metal-matrix composite plates consists of several layers of unidirectionally reinforced, fibrous composite laminae which have different in-plane orientations and are bonded together in a certain stacking sequence. Thus, they provide new materials with superior properties of high strength and stiffness. This study deals with analysis of rectangular metal-matrix composite laminates with circular holes under in-plane static loadings. The first-order shear deformation theory is employed in mathematical formulation. The effects on critical load by hole size, ply lamination geometry, plate thickness ratio, loading types and material modulus ratio have been investigated. The finite element method is used for finding critical loads. Numerical solutions are given in graphical forms.

scholarly journals Three Dimensional Parametric Analyses on Effect of Fibre Orientation for Stress Concentration Factor in Fibrous Composite Cantilever Plate with Central Circular Hole under Transverse Loading

2012 ◽  
Vol 13 (2) ◽  
Author(s):  
Nitin Jain ◽  
MOON Banerjee ◽  
Shubhashish Sanyal
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Elastic Constants ◽  
Stress Concentration Factor ◽  
Concentration Factor ◽  
Fibre Orientation ◽  
Fibrous Composite ◽  
Three Dimensional ◽  
Composite Plates ◽  
Transverse Loading

ABSTRACT: A number of analytical and numerical techniques are available for the two dimensional study of stress concentration around the hole(s) in isotropic and composite plates subjected to in-plane or transverse loading conditions. The information on the techniques for three dimensional analyses of stress concentration factor (SCF) around the hole in isotropic and composite plates subjected to transverse loading conditions is, however, limited. The present work emphasizes on the effect of fibre orientation (q) on the stress concentration factor in fibrous composite plates with central circular hole under transverse static loading condition. The work is carried out for cantilever fibrous composite plates. The effects of thickness -to- width (T/A) and diameter-to-width (D/A) ratios upon SCF at different fibre orientation are studied. Plates of four different composite materials were considered for hole analysis in order to determine the sensitivity of SCF with elastic constants. Deflections in transverse direction were calculated and analysed. All results are presented in graphical form and discussed. The finite element formulation and its analysis were carried out using ANSYS package.ABSTRAK: Terdapat pelbagai teknik analitikal dan numerical untuk kajian tumpuan tegasan dua dimensi di sekeliling lubang-lubang dalam komposit isotropik dan plat pada satah atau keadaan bebanan melintang. Bagaimanapun, maklumat mengenai kaedah analisis tiga dimensi untuk faktor ketumpatan tegasan (SCF) sekitar lubang dalam komposit isotropik dan plat pada keadaan bebanan melintang adalah terhad. Kertas ini menekankan kesan orientasi gentian (q) pada faktor tumpuan tegasan dalam komposit plat bergentian dengan lubang berpusat di bawah keadaan bebanan melintang. Kajian ini dilkukan untuk cantilever plat komposit bergentian. Kesan ketebalan terhadap kelebaran plat (T/A) dan diameter terhadap kelebaran komposit (D/A) dengan SCF pada orientasi gentian berbeza telah dikaji. Plat komposit bagi empat bahan komposit berbeza telah diambilkira bagi kesemua analisis untuk mendapatkan kesensitifan SCF dengan konstan elastic. Defleksi pada arah melintang telah dikira dan dianalisa. Kesemua keputusan telah disembahkan secara grafik dan dibincang. Fomulasi unsur finit dan analisis telah dilaksanakan menggunakan pakej ANSYS.KEYWORDS:          finite element method; stress concentration factor; composites; transverse loading; deflection; elastic constants

Stress concentration around a central hole as affected by material nonlinearity in fibrous composite laminated plates subject to in-plane loading

2015 ◽  
Vol 22 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Ghazi A. Abu-Farsakh ◽  
Amin H. Almasri ◽  
Dana H. Qa’dan
Keyword(s):  
Computer Program ◽  
Fibrous Composite ◽  
Laminated Composite ◽  
Composite Plates ◽  
Material Model ◽  
Laminated Plates ◽  
Material Nonlinearity ◽  
Nonlinear Material ◽  
Rectangular Plates ◽  
Plate Length

AbstractThe distribution of stresses in laminated composite plates with a central circular hole and having various stacking sequences, different geometric dimensions and subjected to in-plane axial tensile loading was investigated. The ANSYS computer program was utilized using the finite element method to study the linear and nonlinear material effects. A new method was proposed for the purpose of incorporating the material nonlinearity model into the ANSYS computer program using the secant modulus material model. The aim of the authors is to analyze the effect of D/b and a/b ratios (where D is hole diameter, b is plate width, and a is plate length) on stresses induced in such plates. Analysis was carried out for angle-ply, four-layered symmetric laminated rectangular plates with various stacking sequences [±θ]s.

Anomalous ultrasonic dispersion in fluid‐coupled, fibrous composite plates

1986 ◽  
Vol 49 (9) ◽  
pp. 492-493 ◽  
Author(s):  
D. E. Chimenti ◽  
Adnan H. Nayfeh
Keyword(s):  
Fibrous Composite ◽  
Composite Plates ◽  
Ultrasonic Dispersion
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