Effect of Delamination on Static Behaviour of Point Supported Composite Conoidal Shells

2020 ◽  
pp. 51-63
Author(s):  
Kamalika Das ◽  
Suman Pandey
Keyword(s):  
Static Behaviour

scholarly journals Manufacturing, Characterisation and Mechanical Analysis of Polyacrylonitrile Membranes

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2378
Author(s):  
Mertol Tüfekci ◽  
Sevgi Güneş Durak ◽  
İnci Pir ◽  
Türkan Ormancı Acar ◽  
Güler Türkoğlu Demirkol ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Main Idea ◽  
Mechanical Analysis ◽  
Operating Conditions ◽  
Load Carrying Capacity ◽  
The Finite Element Method ◽  
Load Carrying ◽  
The Impact ◽  
Static Behaviour ◽  
Modelling Process

To investigate the effect of polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) includes polyacrylonitrile (PAN) and the necessary solvent while the second set (PAN 2) is made of PAN and PVP. These membranes are put through several characterisation processes including tensile testing. The obtained data are used to model the static behaviour of the membranes with different geometries but similar loading and boundary conditions that represent their operating conditions. This modelling process is undertaken by using the finite element method. The main idea is to investigate how geometry affects the load-carrying capacity of the membranes. Alongside membrane modelling, their materials are modelled with representative elements with hexagonal and rectangular pore arrays (RE) to understand the impact of porosity on the mechanical properties. Exploring the results, the best geometry is found as the elliptic membrane with the aspect ratio 4 and the better RE as the hexagonal array which can predict the elastic properties with an approximate error of 12%.

Static behaviour of a shaft with an elliptical crack

2011 ◽  
Vol 25 (5) ◽  
pp. 1674-1686 ◽  
Author(s):  
L. Rubio ◽  
B. Muñoz-Abella ◽  
G. Loaiza
Keyword(s):  
Elliptical Crack ◽  
Static Behaviour

Optimal Design of Composite Lightweight Rollers

1993 ◽  
Author(s):  
K. Bellendir ◽  
Hans A. Eschenauer
Keyword(s):  
Structural Analysis ◽  
Shell Theory ◽  
Analytical Procedure ◽  
Mathematical Optimization ◽  
Optimization Methods ◽  
Analysis Procedure ◽  
Various Boundary Conditions ◽  
Evaluation Models ◽  
Laminate Theory ◽  
Static Behaviour

Abstract A well-aimed layout of fibre-reinforced lightweight rollers does not only require an efficient structural analysis procedure but also the application of structural optimization methods. Therefore, an analytical procedure is introduced for the calculation of the static behaviour of cylindrical shells subject to axisymmetric and/or nonaxisymmetric loads. In the scope of this procedure, arbitrary, unsymmetrical laminates as well as various boundary conditions will be considered. Basis is the shell theory by Flügge enhanced by anisotropic constitutive equations (material law) in the scope of the classical laminate theory. By means of mathematical optimization procedures we then determine optimal lightweight rollers, using different design and evaluation models. For that purpose, coated and uncoated roller constructions as well as hybrid types made of CFRP/GFRP will be applied. Concluding, we will discuss possible improvements and advantages of anisotropic lightweight rollers in contrast to isotropic ones made of steel or aluminium.

scholarly journals Static analysis of a torsion motor generating flexion - extension motions of the elbow

2018 ◽  
Vol 178 ◽  
pp. 07005 ◽  
Author(s):  
Tudor Deaconescu ◽  
Andrea Deaconescu
Keyword(s):  
Static Analysis ◽  
Medical Rehabilitation ◽  
Biological Model ◽  
Neuronal Control ◽  
Pneumatic Muscles ◽  
Flexion Extension ◽  
Static Behaviour

The paper presents the construction and static analysis of a rotation module responsible for conducting flexion-extension motions as part of a medical rehabilitation device of the elbow. The rotation module is actuated by a torsion motor consisting of a pair of agonist-antagonist pneumatic muscles. The study concerning the static behaviour of the rotation module draws upon similarity to the biological model, considering the influence of the neuronal control quantities on the forces developed by the two muscles.

scholarly journals Static behaviour of 3x3 pile group in sand under lateral loading

2017 ◽  
Vol 263 ◽  
pp. 032035
Author(s):  
R SureshKumar ◽  
R BharathKumar ◽  
L MohanKumar ◽  
J Visuvasam ◽  
V Sairam
Keyword(s):  
Pile Group ◽  
Lateral Loading ◽  
Static Behaviour

scholarly journals AN EXPERIMENTAL STUDY ON THE RELAXATION OF BOLTS

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Muhammad Abid ◽  
Muhammad Shahid Khalil ◽  
Hafiz Abdul Wajid
Keyword(s):  
Dynamic Behaviour ◽  
Relaxation Behaviour ◽  
Bolted Joint ◽  
Factors Affecting ◽  
Elastic Interactions ◽  
Short And Long Term ◽  
The Many ◽  
Almost All ◽  
Static Behaviour

Loss of pre-load with time, commonly known as ‘Relaxation’ is an established phenomena. Behaviour of a bolted joint depends upon the pre-load in the bolts in use, not the pre-load introduced by the mechanic. Loss of pre-load is expected due to the many factors such as embedment relaxation, gasket creep, elastic interactions, and vibration loosening or stress relaxation. In a gasketed joint, due to the gasket flexibility, relaxation is always substantial during preliminary passes, as 80 to 100% loss is not uncommon in almost all the bolts, resulting in a dynamic behaviour. Pre-load in a gasketed joint is stabilized and retained to certain extent in the final passes only. In a non-gasketed joint, due to no gasket and no rotation its static behaviour is concluded. This paper highlights the factors affecting the amount of relaxation with time and presents important considerations that can reduce this. Both the short and long term relaxations are recorded and a ‘best fit’ model for relaxation behaviour is derived.

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