scholarly journals An Experimental Simulation to Validate FEM to Predict Transverse Young’s Modulus of FRP Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
V. S. Sai ◽  
M. R. S. Satyanarayana ◽  
V. B. K. Murthy ◽  
G. S. Rao ◽  
A. S. Prasad
Keyword(s):  
Finite Element ◽  
Experimental Results ◽  
Experimental Simulation ◽  
Metallic Materials ◽  
Hexagonal Packing ◽  
Frp Composites ◽  
Young’S Moduli ◽  
Analytical Approaches ◽  
Transverse Modulus ◽  
Good Agreement

Finite element method finds application in the analysis of FRP composites due to its versatility in getting the solution for complex cases which are not possible by exact classical analytical approaches. The finite element result is questionable unless it is obtained from converged mesh and properly validated. In the present work specimens are prepared with metallic materials so that the arrangement of fibers is close to hexagonal packing in a matrix as similar arrangement in case of FRP is complex due to the size of fibers. Transverse Young’s moduli of these specimens are determined experimentally. Equivalent FE models are designed and corresponding transverse Young’s moduli are compared with the experimental results. It is observed that the FE values are in good agreement with the experimental results, thus validating FEM for predicting transverse modulus of FRP composites.

scholarly journals Qualitative Research of AZ31 Magnesium Alloy Aircraft Brackets Produced by a New Forging Method

2016 ◽  
Vol 61 (2) ◽  
pp. 1003-1008 ◽  
Author(s):  
A. Dziubińska ◽  
A. Gontarz ◽  
K. Dziedzic
Keyword(s):  
Qualitative Research ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Numerical Results ◽  
Experimental Results ◽  
Az31 Magnesium Alloy ◽  
Forming Process ◽  
Closed Die Forging ◽  
Selection Of ◽  
Good Agreement

AbstractThe paper reports a selection of numerical and experimental results of a new closed-die forging method for producing AZ31 magnesium alloy aircraft brackets with one rib. The numerical modelling of the new forming process was performed by the finite element method.The distributions of stresses, strains, temperature and forces were examined. The numerical results confirmed that the forgings produced by the new forming method are correct. For this reason, the new forming process was verified experimentally. The experimental results showed good agreement with the numerical results. The produced forgings of AZ31 magnesium alloy aircraft brackets with one rib were then subjected to qualitative tests.

A study on finite element analysis for simplification of curvature extrusion method

2018 ◽  
Vol 32 (19) ◽  
pp. 1840043
Author(s):  
J. O. Yu ◽  
Y. H. Kim ◽  
Nagamachi Takuo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Friction Coefficient ◽  
Extrusion Process ◽  
Experimental Results ◽  
Element Analysis ◽  
Extrusion Method ◽  
Good Agreement

To eliminate the complexity of curvature extrusion process, a new extrusion method was proposed. In this study, a finite element analysis for curvature extrusion was studied to commercialize this extrusion method that creates curvature in a tilting method. When simulating an extrusion process, it is important to fix the appropriate friction coefficient and fillet value to avoid peel-out problems such that the finite element disappears. Therefore, the actual extrusion results and the simulated results were compared to find conditions that the element would not disappear. There was a good agreement between the simulation and experimental results when the coefficient friction was 0.4 and the fillet was 0.4 mm.

Poisson's ratio of plywood measured by tension test

Holzforschung ◽  
2009 ◽  
Vol 63 (5) ◽  
Author(s):  
Hiroshi Yoshihara
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Poisson’S Ratio ◽  
Tension Test ◽  
Experimental Results ◽  
Poisson's Ratio ◽  
Element Analysis ◽  
Young’S Moduli ◽  
Tension Tests ◽  
Finite Element Calculations

Abstract In this research, Poisson's ratio of plywood as obtained by a tension test was examined by varying the width of the specimen. The tension tests were conducted on five-plywood of lauan (Shorea sp.) with various widths, and Young's moduli and Poisson's ratios of the specimens were measured. Finite element calculations were independently conducted. A comparison of the experimental results with those of finite element analysis revealed that Young's modulus could be obtained properly when the width of the plywood strip varied. In contrast, the width of the plywood strip should be large enough to determine Poisson's ratio properly.

Response of UHPC-Concrete Composite Structural Members Using Implicit and Explicit Finite Element Method

2019 ◽  
Vol 793 ◽  
pp. 93-97 ◽  
Author(s):  
Hor Yin ◽  
Kazutaka Shirai ◽  
Wee Teo
Keyword(s):  
Finite Element ◽  
Fe Simulation ◽  
Fe Analysis ◽  
Experimental Results ◽  
Structural Members ◽  
Explicit Finite Element ◽  
Explicit Analysis ◽  
Cracking Pattern ◽  
Implicit And Explicit ◽  
Good Agreement

This paper investigates the response of UHPC-concrete composite structural members using implicit and explicit finite element (FE) methods. Both methods were prepared and conducted individually for the FE analysis under static loading condition. Results of the implicit and explicit analysis were compared to experimental results conducted in previous study. Both the implicit and explicit methods showed similar overall response with fair accuracy compared with the experimental results. In addition, the effective plastic strain obtained from the FE simulation was in good agreement with the damage cracking pattern in the experiment.

scholarly journals Modelling of Hybrid Materials and Interface Defects through Homogenization Approach for the Prediction of Effective Thermal Conductivity of FRP Composites Using Finite Element Method

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
C. Mahesh ◽  
K. Govindarajulu ◽  
V. Balakrishna Murthy
Keyword(s):  
Thermal Conductivity ◽  
Finite Element Method ◽  
Finite Element ◽  
Hybrid Materials ◽  
Matrix Interface ◽  
Frp Composites ◽  
Homogenization Approach ◽  
Fibre Matrix ◽  
Good Agreement ◽  
Element Method

Finite element method is effectively used to homogenize the thermal conductivity of FRP composites consisting of hybrid materials and fibre-matrix debonds at some of the fibres. The homogenized result at microlevel is used to determine the property of the layer using macromechanics principles; thereby, it is possible to minimize the computational efforts required to solve the problem as in state through only micromechanics approach. The working of the proposed procedure is verified for three different problems: (i) hybrid composite having two different fibres in alternate layers, (ii) fibre-matrix interface debond in alternate layers, and (iii) fibre-matrix interface debond at one fibre in a group of four fibres in one unit cell. It is observed that the results are in good agreement with those obtained through pure micro-mechanics approach.

Finite Element Modeling of a Homogeneous Pneumatic Tire Subjected To Footprint Loadings

1985 ◽  
Vol 13 (2) ◽  
pp. 91-110 ◽  
Author(s):  
R. A. Ridha ◽  
K. Satyamurthy ◽  
L. R. Hirschfelt
Keyword(s):  
Finite Element ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Contact Forces ◽  
Experimental Results ◽  
Contact Algorithm ◽  
Footprint Area ◽  
Distribution Of Stress ◽  
Different Levels ◽  
Good Agreement

Abstract In this paper, we use an approach which involves 3D finite elements and a contact algorithm. For a given deflection of the hub, the algorithm computes the nodes that come into contact with a predefined contact plane, and the magnitudes of the contact forces at the nodes. Thus, the algorithm computes the size and shape of the footprint, and the contact forces at the FE nodes. To illustrate the technique, we analyze a homogeneous tire subjected to footprint loading. The computed shapes and sizes of the footprint area at different levels of rim deflection are shown to be in good agreement with experimental results. The computed tire profiles and the load-deflection response of the tire are also in good agreement with experimental results. The computed results include the distribution of stress, strain, and strain energy density within the tire, and the changes in this distribution with applied footprint loadings.

Modeling of tensile and bending properties of biaxial weft knitted composites

2015 ◽  
Vol 22 (3) ◽  
pp. 303-313 ◽  
Author(s):  
Ozgur Demircan ◽  
Shinsuke Ashibe ◽  
Tatsuya Kosui ◽  
Asami Nakai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Beam Theory ◽  
Experimental Results ◽  
Composite Panel ◽  
The Finite Element Method ◽  
Bending Properties ◽  
Bending Modulus ◽  
Laminate Beam ◽  
Good Agreement

AbstractWithin the scope of experiments, the effect of aramid and glass yarns as stitch and biaxial (warp and weft) yarns in the biaxial weft knitted (BWK) composite was compared. After production of four types of composite panel using the hand lay-up method, the tensile and bending properties of the BWK composites were investigated both experimentally and numerically. The composite with the glass stitch and biaxial yarns exhibited higher tensile and bending properties than did the composite with the aramid stitch and biaxial yarns. The good agreement between the experimental results and the numerical results validated the applicability of the finite-element method for the BWK composites. The laminate beam theory was utilized as another modeling method for calculation of the bending modulus.

scholarly journals Optimization of EDM Parameters for Production of Biomedical Materials

2021 ◽  
Vol 7 (2) ◽  
pp. 1-8
Author(s):  
Mukesh Kumar Rakesh ◽  
Dr. Syed Faisal Ahmed
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Solution ◽  
Literature Survey ◽  
Experimental Results ◽  
Physical Parameters ◽  
The Finite Element Method ◽  
Critical Areas ◽  
Cylindrical Cup ◽  
Good Agreement

The finite element method (FEM) is used for simulating complex intricate shapes of industrial sheet forming operation. Effective physical parameters, as well as the numerical solution, influence the parameters of this phenomenon and its numerical prediction of results. In this study, to investigate the influence of different embossing patterns and embossing depths on the critical areas appearing during deep-drawn of a cylindrical cup. The numerical results are found from the literature survey to be in good agreement with the experimental results and accurate thinning distributions had been predict.

FINITE ELEMENT MODELING OF STEEL-CONCRETE COMPOSITE BEAMS STRENGTHENED WITH PRESTRESSED CFRP PLATE

2012 ◽  
Vol 12 (01) ◽  
pp. 23-51 ◽  
Author(s):  
R. EL-HACHA ◽  
P. ZANGENEH ◽  
H. Y. OMRAN
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Parametric Study ◽  
Large Scale ◽  
Composite Beams ◽  
Experimental Results ◽  
Fe Model ◽  
Element Modeling ◽  
Cfrp Plate ◽  
Good Agreement

Results from finite element modeling (FEM) of large-scale steel-concrete composite beams strengthened in flexure with prestressed carbon fiber-reinforced polymer (CFRP) plate were validated with experimental results and presented in this paper. The effect of varying the level of prestressing as percentage of the ultimate tensile strength of the CFRP plate was investigated. Comparison was carried out in terms of overall load-deflection behavior, strain profile along the length of the CFRP plate, and strain distribution across the depth of the beam at mid-span section. Very good agreement was observed between the finite element (FE) and the experimental results. The validated FE models were used to perform a comprehensive parametric study to investigate the changes in the behavior through wider range of prestressing levels and then, determine the optimum prestressing level that maintain the unstrengthened beams' original ductility (or energy absorption). An iterative analytical model was also developed, validated with both the FE model and the experimental results, and showed good agreement. A parametric study was carried out to investigate the effect of changing the yield strength of the steel and the concrete compressive strength on the moment of resistance of the section and the strain in the CFRP plate at ultimate.

scholarly journals A Comparative Study of Analytical Rosenthal, Finite Element, and Experimental Approaches in Laser Welding of AA5456 Alloy

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 436 ◽  
Author(s):  
Hamidreza Hekmatjou ◽  
Zhi Zeng ◽  
Jiajia Shen ◽  
J. P. Oliveira ◽  
Homam Naffakh-Moosavy
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Laser Welding ◽  
High Energy ◽  
Experimental Results ◽  
High Energy Density ◽  
Analytical Equation ◽  
Fe Model ◽  
Melt Pool ◽  
Analytical Approaches

The thermal regime and microstructural phenomenon are studied by using finite-element (FE) modelling and the analytical Rosenthal equation during laser welding of aluminum alloy 5456 (AA5456) components. A major goal is to determine the merits and demerits of this analytical equation which can be an alternative to FE analysis, and to evaluate the effect of imperative assumptions on predicted consequences. Using results from the analytical and numerical approaches in conjunction with experiments, different physical features are compared. In this study, the results obtained from experiments in terms of melt pool shapes are compared with the predicted ones achieved from the numerical and analytical approaches in which the FE model is more accurate than the Rosenthal equation in the estimation of the melt pool dimensions. Furthermore, as to the partially melted zones, the estimations achieved from the numerical modeling are more genuine than ones from the analytical equation with regards to the experimental results. At high energy density, near keyhole welding mode, the reported results show that experimental melt widths are supposed to be narrower than the fusion widths estimated by the analytical solution. The primary explanation could be the influence of thermal losses that occurred during convection and radiation, which are neglected in the Rosenthal equation. Additionally, the primary dendrite arm spacing (PDAS) estimated with the numerical modeling and the analytical Rosenthal solution is comparable with the experimental results obtained.

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