DIRECT IDENTIFICATION OF ELASTIC CONSTANTS OF ANISOTROPIC PLATES BY MODAL ANALYSIS: EXPERIMENTAL RESULTS

1998 ◽  
Vol 210 (5) ◽  
pp. 643-659 ◽  
Author(s):  
M. Grédiac ◽  
N. Fournier ◽  
P.-A. Paris ◽  
Y. Surrel
Keyword(s):  
Modal Analysis ◽  
Elastic Constants ◽  
Experimental Results ◽  
Direct Identification ◽  
Anisotropic Plates

scholarly journals Analysis and Testing of the Dynamic Characteristics of Rotor Worktable

2021 ◽  
Vol 2113 (1) ◽  
pp. 012061
Author(s):  
Jianmin Wang ◽  
Dong Liu ◽  
Yi Bian
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Mesh Generation ◽  
Finite Element Modelling ◽  
Experimental Results ◽  
Element Modelling ◽  
Software Analysis ◽  
Finite Element Software ◽  
Research And Teaching

Abstract The finite element modelling, mesh generation and modal analysis of the rotor worktable are carried out by combining the analysis technology of finite element software in this paper. Then, the software analysis results and the actual experimental results are compared and analyzed, so as to get the causes of error, which can provide good basic data for the use of the rotor table in the future that could better meet the needs of scientific research and teaching.

Determination of orthotropic bone elastic constants using FEA and modal analysis

2002 ◽  
Vol 35 (6) ◽  
pp. 767-773 ◽  
Author(s):  
W.R. Taylor ◽  
E. Roland ◽  
H. Ploeg ◽  
D. Hertig ◽  
R. Klabunde ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Elastic Constants

Determination of Elastic Constants of Anisotropic Plates by Phase Stepping Speckle Interferometry

2001 ◽  
Vol 221-222 ◽  
pp. 363-374 ◽  
Author(s):  
L. Bruno ◽  
Franco Furgiuele ◽  
Leonardo Pagnotta ◽  
A. Poggialini
Keyword(s):  
Elastic Constants ◽  
Speckle Interferometry ◽  
Anisotropic Plates ◽  
Phase Stepping

Micropolar elasticity theory: a survey of linear isotropic equations, representative notations, and experimental investigations

2016 ◽  
Vol 22 (2) ◽  
pp. 224-242 ◽  
Author(s):  
Soroosh Hassanpour ◽  
Glenn R. Heppler
Keyword(s):  
Elasticity Theory ◽  
Elastic Constants ◽  
Couple Stress ◽  
Elastic Moduli ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Micropolar Elasticity ◽  
Classical Elasticity ◽  
Material Constants ◽  
Isotropic Theory

This paper is devoted to a review of the linear isotropic theory of micropolar elasticity and its development with a focus on the notation used to represent the micropolar elastic moduli and the experimental efforts taken to measure them. Notation, not only the selected symbols but also the approaches used for denoting the material elastic constants involved in the model, can play an important role in the micropolar elasticity theory especially in the context of investigating its relationship with the couple-stress and classical elasticity theories. Two categories of notation, one with coupled classical and micropolar elastic moduli and one with decoupled classical and micropolar elastic moduli, are examined and the consequences of each are addressed. The misleading nature of the former category is also discussed. Experimental investigations on the micropolar elasticity and material constants are also reviewed where one can note the questionable nature and limitations of the experimental results reported on the micropolar elasticity theory.

Stresses of Thick Perforated Plates With Reinforcement of Tubes and Their Effective Elastic Constants

1992 ◽  
Vol 114 (3) ◽  
pp. 271-279 ◽  
Author(s):  
K. C. Hwang ◽  
M. D. Xue ◽  
X. F. Wen ◽  
G. Chen
Keyword(s):  
Elastic Constants ◽  
Experimental Results ◽  
Design Codes ◽  
Perforated Plates ◽  
Effective Elastic Constants ◽  
Solid Plate ◽  
Current Design ◽  
Stiffening Effect

Based on the concept of equivalent solid plate, this paper deals with thick perforated plates with triangular or square patterns of holes reinforced by tubes. The results obtained show that the tubes connected (by welding or expanding) to the perforated plates lead to a noticeable stiffening effect which is neglected or considerably underestimated by current design codes. The stresses of tubesheets calculated based on the effective elastic constants given by this method are in better agreement with the experimental results than those based on the effective elastic constants given by current codes.

Investigation on Vibration Behaviour of Cantilever Type Glass/Carbon Hybrid Composite Beams at Higher Frequency Range Using Finite Element Method

2014 ◽  
Vol 984-985 ◽  
pp. 257-265 ◽  
Author(s):  
R. Murugan ◽  
Rajagopal Ramesh ◽  
K. Padmanabhan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Modal Analysis ◽  
Elastic Constants ◽  
Hybrid Composite ◽  
Composite Beams ◽  
Woven Fabric ◽  
Frequency Range ◽  
Glass Carbon ◽  
Element Method

Woven fabric composites are now being increasingly used in aircraft and automobile structures due to balanced properties in the fabric plane. In the present work, woven fabric glass beam is modified and strengthened by interplying high modulus carbon fabric plies for improving the strength to weight ratio and thereby to achieve better performance in various dynamic conditions. The objective of the present work is to investigate the vibration behavior of cantilever type glass/carbon hybrid composite beams subjected to higher frequency of operation using finite element method. Unit plied woven fabric glass, carbon and hybrid of glass/carbon laminates were fabricated using hand layup technique. Experimental modal analysis of unit plied composite beams was carried out by impulse excitation technique under fixed free boundary condition. Theoretical modal analysis was done by finite element method using elastic constants derived from rule of mixture equations. The experimental and theoretical frequency results were compared and analyzed for finding the degree of deviation using regression analysis. The coefficients of regression analysis were used to find effective elastic constants of composite laminates. Further these effective elastic constants were applied for modal analysis of hybrid composite beams under higher frequency range. The results of mode shape, modal frequency of hybrid beams were reported and discussed. The effect of stacking sequence and effect of beam size on vibration characteristics at higher frequency range was also discussed.

Physical Model of a 3-Constant Isotropic Elastic Material

1965 ◽  
Vol 32 (4) ◽  
pp. 837-841 ◽  
Author(s):  
W. H. Hoppmann ◽  
F. O. F. Shahwan
Keyword(s):  
Physical Model ◽  
Elastic Constants ◽  
Elastic Material ◽  
Constitutive Equations ◽  
Experimental Results ◽  
Pure Bending ◽  
Couple Stresses ◽  
Related Theory ◽  
Isotropic Elastic Material ◽  
Design And Construction

A study is presented of the statical deformation of a model of a supposed 3-constant isotropic elastic material which exhibits the phenomenon of couple stresses. A description of the design and construction of the physical model is given. The related theory is summarized briefly and used in order to determine the three independent elastic constants which characterize the model of the material. The specific constitutive equations are presented. Experimental results are given for the model loaded in a mode which may be called pure bending.

Sign in / Sign up

Export Citation Format

Share Document