Experimental verification of the load-carrying capacity of smooth glass-fiber shells under the influence of external hydrostatic pressure

1973 ◽  
Vol 9 (9) ◽  
pp. 983-986 ◽  
Author(s):  
A. A. Kritsuk ◽  
O. A. Goroshko ◽  
L. M. Bobko ◽  
V. S. Bochkovskii ◽  
N. A. Bondarenko
Keyword(s):  
Hydrostatic Pressure ◽  
Glass Fiber ◽  
Experimental Verification ◽  
Carrying Capacity ◽  
Load Carrying Capacity ◽  
External Hydrostatic Pressure ◽  
Load Carrying

scholarly journals Design of Composite I-Beam Section to Prevent Web-Flange Junction Failure and Improving Its Axial Load Carrying Capacity

2019 ◽  
Vol 9 (1) ◽  
pp. 2373-2380
Keyword(s):  
Glass Fiber ◽  
Carrying Capacity ◽  
Failure Strength ◽  
Load Carrying Capacity ◽  
Flat Plates ◽  
Element Analysis ◽  
Bath Solution ◽  
Load Carrying ◽  
Acidic Bath ◽  
The Web

Most of the chemical industries are used with Polyurethane (PU) coated steel sample which is found that some chemical reaction and rusted in acidic bath solution becomes a problem in industry. For such problems composite materials can be of good solution which does not possess any reaction with working fluids (acids in our case). With composites there is complexity of manufacturing and high cost involvement, so as to avoid those simplified approach is used to get Flat plates made of Glass fiber reinforced in epoxy which is best solution for any acidic bath as it possesses high resistance to any reaction with itself. Glass fiber plates are cut into the size of dimension and with the help of adhesives joint the WFJ of I-Beam, there are two different types of adhesives used, araldite 2015 and Hundsman araldite are used. The hundsman araldite is found to get better performance of Web-Flange junction (WFJ) joint. Finite element analysis (FEA) is used to get initial validation and further it’s observed that Hundsman araldite failure strength on the web-flange junction is better. Also, additional cleat used with 4 mm, 12 mm for increasing the Web-Flange junction (WFJ) area to improve the Load carrying capacity of the Beam. The experimental analysis results clearly indicate that the emersion of the reinforced epoxy glass-fiber in the acidic bath solution for a certain period, there is no any reaction formed in the acidic bath and improved the behavior of the specimen. Results from FEA and experimental test have shown good correlations are obtained with improvement of failure strength on WFJ

Experimental Verification of Glass-Fibre-Concrete Covers of Footbridge Deck Cornice, Subjected to Wind Loading Actions

2014 ◽  
Vol 590 ◽  
pp. 363-367 ◽  
Author(s):  
Marcela Karmazínová ◽  
Jindrich Melcher ◽  
Michal Štrba
Keyword(s):  
Glass Fibre ◽  
Experimental Verification ◽  
Carrying Capacity ◽  
Wind Loading ◽  
Load Carrying Capacity ◽  
Fibre Concrete ◽  
Load Carrying

The paper summarizes the results and evaluation of tests of the resistance of glass-fibre-concrete components used for footbridge deck cover subjected to wind loading actions. The main aims of this research was not only to verify the objective load-carrying capacity and serviceability of covering panels, but also to verify the use of glass-fibre-concrete and its properties, if applied for non-typical product. The tests also show the usage of the unique and effective method of the vacuum loading. The research has been elaborated based on the requirements of DAKO Brno Ltd. Company.

Theoretical and Experimental Analysis of Hydrostatic Thrust Bearings

1960 ◽  
Vol 82 (3) ◽  
pp. 505-511 ◽  
Author(s):  
R. C. Elwell ◽  
B. Sternlicht
Keyword(s):  
Experimental Verification ◽  
Carrying Capacity ◽  
Experimental Analysis ◽  
Load Carrying Capacity ◽  
Constant Flow ◽  
Temperature Changes ◽  
Thrust Bearings ◽  
Flow Restriction ◽  
Load Carrying ◽  
Different Types

This paper presents theoretical and experimental analysis of two types of circular hydrostatic thrust bearings, using incompressible lubricants. Design equations for load-carrying capacity, stiffness, and flow, are given for three different types of flow restriction—orifice, capillary, and constant flow. Experimental verification of the equations is shown. It is seen that each method of restriction imparts its own characteristics on the bearing performance. Constant flow, for instance, results in the stiffest bearing under certain conditions, and capillary restriction is unaffected by temperature changes.

Buckling of Barreled Shells Subjected to External Hydrostatic Pressure

2000 ◽  
Vol 123 (2) ◽  
pp. 232-239 ◽  
Author(s):  
J. Błachut ◽  
P. Wang
Keyword(s):  
Carrying Capacity ◽  
Ultimate Load ◽  
Load Capacity ◽  
External Pressure ◽  
Load Carrying Capacity ◽  
External Hydrostatic Pressure ◽  
Buckling Loads ◽  
Load Carrying ◽  
Initial Geometric Imperfections ◽  
Steel Cylindrical Shell

The paper considers barreling of a mild steel cylindrical shell as a way of improving its load carrying capacity when subjected to static external pressure. Numerical results show that the load carrying capacity can be increased from 1.4 to 40 times above the load capacity of mass equivalent cylinders. The effect of end boundary conditions on the ultimate load is examined together with sensitivity of buckling loads to initial geometric imperfections.

Actual Effects of Local Buckling of Thin-Walled Metal Roof Decking: Control Experimental Verification Performed during Structure Realization

2013 ◽  
Vol 368-370 ◽  
pp. 1503-1506
Author(s):  
Marcela Karmazínová ◽  
Jindrich Melcher
Keyword(s):  
Experimental Verification ◽  
Carrying Capacity ◽  
Failure Process ◽  
Local Buckling ◽  
Load Carrying Capacity ◽  
Limit States ◽  
Loading Test ◽  
Actual Behaviour ◽  
Load Carrying ◽  
Thin Walled

Experimental verification of structural members can be the necessary part of the structural design of load-carrying civil structures, mainly in the period of last two decades. In some cases, the knowledge obtained from the tests is the sole source of the reliable information about actual behaviour of structural member in strain and failure process and about its objective load-carrying capacity. The paper is specifically aimed at the control experimental verification of roof decking based on thin-walled metal profiled sheets. Loading test has been performed during structure erection, as additional resource for the verification of actual behaviour and objective load-carrying capacity and for the confirmation or refinement of static design assumptions and results, within the ultimate and serviceability limit states. The subject of the control experimental verification was roof decking composed of thin-walled metal cassettes with thermal insulation at its upper side, used for the university lecture room roofing.

Tilting-Pad Journal Bearing in Hybrid Operation: A Numerical and Experimental Investigation

2018 ◽  
Author(s):  
Nico Buchhorn ◽  
Sebastian Kukla ◽  
Beate Bender ◽  
Marc Neumann
Keyword(s):  
Hydrostatic Pressure ◽  
Carrying Capacity ◽  
Journal Bearing ◽  
Operating Conditions ◽  
Load Carrying Capacity ◽  
Oil Supply ◽  
Hybrid Operation ◽  
Tilting Pad ◽  
Load Carrying ◽  
Tilting Pad Journal Bearing

Large turbine bearings are usually equipped with hydrostatic jacking mechanisms to separate bearing and shaft during transient start-stop procedures. They are turned off once hydrodynamic operation is reached. In some cases, under severe operating conditions, the hydrostatic oil supply is kept running although the rotor already runs in full speed. The supplied amount of jacking oil is very small compared to the regular oil supply. However, experimental data of a large tilting-pad bearing shows that this hybrid operation has a considerable impact on the load carrying capacity in terms of lower pad temperature and larger film thickness. In this paper, a theoretical investigation to analyse the effect of increased load carrying capacity of a large tilting-pad journal bearing in hybrid operation is presented. The increase is driven by three different aspects: 1) hydrostatic pressure component, 2) increase in lubricant viscosity due to the injection of cold oil, 3) decrease of temperature gradients and thus thermal pad deformation. Subject of the approach is a ø500 mm five-pad, rocker-pivot tilting-pad journal bearing in flooded lubrication mode. The experiments are carried out on the Bochum test rig for large turbine bearings. The theoretical analyses are performed with a simulation code solving the Reynolds and energy equations for the oil film and calculating the thermomechanical pad deformations simultaneously. By considering each of the three above aspects separately and in combination, their share of load increase can be assessed individually. Contrary to expectations, the results indicate that the increase is not mostly based on the hydrostatic pressure component. Instead, the advantageously decreased pad deformations make the largest contribution to the increased load carrying capacity while the alteration in viscosity shows the least impact.

Carrying Capacity of Strain-Hardening Austenitic Stainless Steel Pressure Vessels Under Hydrostatic Pressure

2011 ◽  
Author(s):  
Yang-chun Deng ◽  
Gang Chen
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Hydrostatic Pressure ◽  
Austenitic Stainless Steel ◽  
Strain Hardening ◽  
Carrying Capacity ◽  
Plastic Instability ◽  
Pressure Vessels ◽  
Load Carrying Capacity ◽  
Load Carrying

To reduce the waste of austenitic stainless steels due to their low yield strengths, the strain hardening technology is used to significantly improve their yield strength, in order to increase the elastic load carrying capacity of austenitic stainless steel pressure vessels. The basic principle of strain-hardening for austenitic stainless steel pressure vessels and two common models of strain hardening, including Avesta Model for ambient temperature and Ardeform Model for cryogenic temperature, were briefly introduced. However, it was fully established by experiments, the lack of a necessary theoretical foundation and the safety concern affect its widespread use. In this study, we investigated the load carrying capacity of strain-hardening austenitic stainless steel pressure vessels under hydrostatic pressure, based on the elastic-plastic theory. To understand the effects of strain hardening on material behavior, the plastic instability loads of a round tensile bar specimen were also derived under two different loading paths and validated by experiments. The results of theoretical, experimental and finite element analyses illustrated, considering the effect of material strain hardening and structural deformation, at ambient temperature, the static load carrying capacity of pressure vessels does not relate to the loading paths. To calculate the plastic instability pressures, a method was proposed so that the original dimension and original material parameters prior to strain hardening can be used either by the theoretical formula or finite element analysis. The safety margin of austenitic stainless steel pressure vessels under various strain hardening degrees was quantitatively analyzed by experiments and finite element method. A 5% strain as the restrictive condition of strain hardening design for austenitic stainless steel pressure vessels was suggested.

scholarly journals Investigation on Retrofitting of Reinforced Concrete Beam with Glass Fiber and Banana Fiber Mat

2021 ◽  
Keyword(s):  
Reinforced Concrete ◽  
Glass Fiber ◽  
Carrying Capacity ◽  
Concrete Beam ◽  
Ultimate Load ◽  
Initial Crack ◽  
Beam Specimen ◽  
Load Carrying Capacity ◽  
Banana Fiber ◽  
Load Carrying

Abstract. Concrete is the predominant material in the construction industry. To be sustainable, the old Reinforced Concrete (RC) buildings should be retrofitted, and the life of the building should be extended. Experimental study has been attempted to investigate the load carrying capacity of concrete beam strengthened with glass fiber and banana fiber mat. The primary aim of this study is to retrofit the RC beam specimen to enhance the load carrying capacity. All the beams were casted with the same grade of concrete (M30) and same structural detailing. Two-point symmetrical loading were given to the control beams to obtain load at initial crack and ultimate load. Then the beams other than control beams were loaded till it showes initial crack and then retrofitted with banana fiber and glass fiber bonded externally with resin. The retrofitted beams were tested for ultimate load performance. Load carrying capacity was higher for both retrofitting but the beam retrofitter with glass fiber showed significant improvement in the ultimate load carrying capacity.

Load-Carrying Capacity of Cantilevers of Anti-Flood Barriers Made of FRP Composite Structural Profiles

2012 ◽  
Vol 268-270 ◽  
pp. 28-31 ◽  
Author(s):  
Jindrich Melcher ◽  
Marcela Karmazínová
Keyword(s):  
Czech Republic ◽  
Cross Section ◽  
Experimental Verification ◽  
Carrying Capacity ◽  
Failure Mechanisms ◽  
Load Carrying Capacity ◽  
Frp Composite ◽  
Load Carrying ◽  
Lower Water Level ◽  
Water Proof

After the devastating floods in the Europe and Czech Republic especially, in 1997, 2002 and 2007 years, the need of the anti-flood protection was very actual and delicate. One of the ways, how to solve this problem in the case of usual or lower water level, is the usage of anti-flood barriers. The paper is focused on the experimental verification of the actual behaviour, load-carrying capacity and failure mechanisms of the cantilevers made of FRP composite profiles PREFEN, which are in reality used as columns of anti-flood barriers. The investigated water-proof profile of H-cross-section is composed of epoxy resin and glass fibres.

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