scholarly journals Numerical analysis of the impact of removing a corner column in a continuous slab-column structure in relation to the experimental model

2020 ◽  
Vol 310 ◽  
pp. 00054
Author(s):  
Miroslaw Wieczorek
Keyword(s):  
Numerical Analysis ◽  
Numerical Modelling ◽  
Experimental Model ◽  
Experimental Research ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Column Structure ◽  
Continuous Slab ◽  
The Impact ◽  
Model Support

The paper presents the numerical analysis of the impact of removing a corner column on the behavior of a continuous slab-column structure. The model uses the minimal reinforcement amount compliant with Eurocodes. The basis for numerical modelling was the experimental research of a piece of a slab-column structure with the dimensions of 3.0×3.0 m in column axes. The article includes a detailed description of the assumed conditions of the model support, the method of loading and reading of the results. The paper also compares the obtained results of numerical calculations with experimental results.

Numerical/Experimental Research on Welded Joints in Aluminium Truss Girders

2016 ◽  
Vol 710 ◽  
pp. 295-300
Author(s):  
Dianne van Hove ◽  
Frans Soetens
Keyword(s):  
Numerical Analysis ◽  
Failure Mode ◽  
Experimental Research ◽  
Welded Joints ◽  
Failure Load ◽  
Full Scale ◽  
Numerical Calculations ◽  
Failure Behavior ◽  
Design Rules ◽  
Steel Design

Welded joints in a 30 meter span aluminium truss girder were investigated numerically and experimentally. Since aluminium design rules for welded K-and N-joints in CHS truss girders were lacking the joints were checked using steel design rules. Calculations showed that the N-joints were governing for chord and brace sizes. Further numerical analysis on the N-joints using ANSYS 11.0 was carried out. Full scale experimental research was successfully carried out for validation of the numerical calculations. It is concluded that steel design rules predict the failure behavior and failure mode of the considered aluminium N-joints well. However, steel design rules overestimate the failure load by 8% for the truss configurations investigated.

Experimental Research of Shrinkage in Thick Concrete Elements

2015 ◽  
Vol 1106 ◽  
pp. 122-127
Author(s):  
Jan L. Vítek ◽  
David Čítek ◽  
Petr Tej
Keyword(s):  
Numerical Analysis ◽  
Experimental Research ◽  
Large Scale ◽  
Concrete Structures ◽  
Heat Of Hydration ◽  
Experimental Results ◽  
Thick Wall ◽  
Floor Slab ◽  
Scale Models ◽  
Concrete Elements

At the construction of complex concrete structures of the laser centre, the client required verification of casting procedures on large scale models. Models of the thick floor slab and of the thick wall were built in the scale 1:1, where the temperatures induced by heat of hydration and shrinkage strains were measured. The results of the experiments showed that the measured strains were larger than those expected on the basis of prediction according to European codes. Experimental results were compared with the results of numerical analysis.

scholarly journals NUMERICAL ANALYSIS OF THE IMPACT OF SIDESLIP ANGLE ON LOAD OF THE GYROCOPTER STABILIZERS

Aviation ◽  
2020 ◽  
Vol 23 (4) ◽  
pp. 114-122
Author(s):  
Zbigniew Czyż ◽  
Paweł Karpiński
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Analysis ◽  
Angle Of Attack ◽  
Three Dimensional ◽  
Numerical Calculations ◽  
Slip Angle ◽  
Sideslip Angle ◽  
Ansys Fluent ◽  
The Impact

The paper presents some of the works related to the project of modern gyrocopter construction with the possibility of a short start, known as "jump-start". It also presents a methodology related to numerical calculations using Computational Fluid Dynamics based on ANSYS Fluent three-dimensional solver. The purpose of the work was to calculate the forces and aerodynamic moments acting on the gyrocopter stabilizers. The calculations were carried out for a range of angle of attack α from –20° to +25° and for a sideslip angle β from 0° to 20°. Based on the calculations carried out, analysis of the impact of the slip angle on the load on the stabilizers has been made.

Development and Experimental Research of Two-Way Impact Pneumatic Cylinder

2013 ◽  
Vol 331 ◽  
pp. 236-241
Author(s):  
Chao Hui Gai ◽  
Cheng Gang Wang ◽  
Xiao Heng Xie
Keyword(s):  
Experimental Model ◽  
Experimental Research ◽  
Impact Energy ◽  
Working Life ◽  
Pressure Variation ◽  
Working Environment ◽  
Pneumatic Cylinder ◽  
Experimental Platform ◽  
Direction Control ◽  
The Impact

Abstract—his paper has presented a design scheme of the new model of the impact pneumatic cylinder, and designed and analyzed the key part of the impact pneumatic cylinder ,such as direction-control valves, piston rod. Meanwhile, the experimental model-machine was manufactured and used for the test on the experimental platform. The numerous lifespan testing, based on simulation in the practical working environment, was conducted and we obtained the pressure variation in impact pneumatic cylinder, and concluded that the impact energy and working life could be dramatically improved.

Experimental Research and ANSYS Analysis of Temperature Field of Concrete Specimens Reinforced by Paste Method in the Fire

2013 ◽  
Vol 405-408 ◽  
pp. 2677-2680
Author(s):  
Yan Bo Li ◽  
Jian Zhong Liu ◽  
Su Juan Fu
Keyword(s):  
Mechanical Properties ◽  
Temperature Field ◽  
High Temperature ◽  
Experimental Research ◽  
Fire Retardant ◽  
Experimental Results ◽  
Temperature Fields ◽  
Ansys Analysis ◽  
Reinforcement Material ◽  
The Impact

In this paper, the temperature fields of concrete specimens reinforced by paste method were analyzed by experiment and ANSYS in the fire, it proved that the impact of reinforcement material on the temperature field of the specimens can be ignored, it identified that the best thickness of the fire-retardant coating is 40mm for steel-confined specimens and 50mm for CFRP-confined specimens. The calculations agreed well with the experimental results, it provides conditions for mechanical properties of the concrete reinforced by paste method at high temperature.

Impact of Structural Characteristics of Flexspline on the Stresses Occurring at the Tooth Space Bottom

2014 ◽  
Vol 1036 ◽  
pp. 631-636
Author(s):  
Piotr Folęga
Keyword(s):  
Numerical Analysis ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Structural Characteristics ◽  
Numerical Calculations ◽  
Pressure Angle ◽  
Number Of Teeth ◽  
University Of Technology ◽  
Curve Radius ◽  
The Impact

The author of the article applied the boundary element method (BEM) to determine stresses occurring in a toothed rim of a flexspline. The relevant numerical calculations were conducted using software developed at the Faculty of Transport of the Silesian University of Technology. The numerical analysis conducted for flexsplines entailed the impact exerted by parameters of an indented toothed flexspline rim (number of teeth, addendum modification coefficient) and of a gear tool (gear tool head curve radius, pressure angle) on values of the stresses occurring at the tooth space bottom. Results of the said calculations have been depicted as curves of dependences between stresses at the tooth space bottom in the function of the number of flexspline rim teeth on constant values of the addendum modification coefficient. The cumulative diagrams developed based on the results of the calculations conducted may provide guidelines as to the manner of designing flexsplines for harmonic drives.

Investigation of Helmet Based on Origami Structures

2017 ◽  
Author(s):  
Yang Yang ◽  
Chie Nara ◽  
Xiaoshi Chen ◽  
Ichiro Hagiwara
Keyword(s):  
Numerical Analysis ◽  
Natural Disaster ◽  
Energy Absorption ◽  
Mechanical Characteristics ◽  
Safety Performance ◽  
Experimental Results ◽  
Corrugated Cardboard ◽  
The Impact ◽  
Origami Engineering

The earthquake is a natural disaster which is irresistible and hard to forecast. In the earthquakes, the helmets play an important role in protecting the head of people. The traditional helmets have some disadvantages of storability. Even very few foldable helmets have been designed, the price of them are expensive. In order to overcome these disadvantages, and from the prospect of application to origami-engineering, we challenged to invent a foldable helmet based on origami structures. We designed the helmet using the origami structures of accordion cover origami structure/honeycomb origami structure and the low-priced energy absorption material of corrugated cardboard. Because the designed origami helmet is necessary to satisfy the safety performance, the impact FEM analyses are done to investigate the mechanical characteristics of the designed origami helmets. And the experiments are also done to confirm the safety performance of the designed helmets. Finally, the numerical analysis results are compared with the experimental results.

Experimental and Numerical Analysis of Behaviour of Old Brick Masonries

2010 ◽  
Vol 133-134 ◽  
pp. 307-312 ◽  
Author(s):  
Nathalie Domede ◽  
Alain Sellier
Keyword(s):  
Numerical Analysis ◽  
Numerical Modelling ◽  
Mechanical Behaviour ◽  
Damage Model ◽  
Compressive Load ◽  
Experimental Results ◽  
Masonry Structures ◽  
Existing Buildings ◽  
Behaviour Law ◽  
Experimental Behaviour

The calculation of old existing masonry structures needs a homogeneous mechanical behaviour law under tensile and compressive load until collapse. The samples extracted from existing buildings are necessarily limited in dimension and number and it is not possible to perform tests directly on a representative volume, so the numerical modelling of masonry mechanical behaviour has to be predicted from the behaviour of its constitutive elements. The aim of the study presented here was to develop a method able to define the homogeneous representative law for brick masonry from those of its components, bricks and mortar, in tension and in compression, including linear and non-linear domains. The method is numeric, fitted on experimental results. Tests were carried out on mortar samples, brick samples, and multilayer samples. Their experimental behaviour is described and a damage model is used to describe the behaviour of the masonry. An explanation is given of how the homogeneous characteristics of the masonry were defined and the influence of some parameters is presented.

scholarly journals THE ROLE OF BACKFILL QUALITY ON CORRUGATED STEEL PLATE CULVERT BEHAVIOUR

2017 ◽  
Vol 12 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Damian Beben
Keyword(s):  
Numerical Analysis ◽  
Internal Friction ◽  
Steel Plate ◽  
Plate Thickness ◽  
Numerical Calculations ◽  
Unit Weight ◽  
Steel Shell ◽  
Orthotropic Plates ◽  
Angle Of Internal Friction ◽  
The Impact

The subject of the article is a three-dimensional numerical analysis of the impact of backfill quality on the deformation of corrugated steel plate culvert. In the numerical analysis, the author took into consideration three different backfill types. The paper presents the calculations performed with the use of Abaqus program based on finite element method. A steel shell was modelled with the use of the theory of orthotropic plates, and backfill with the use of elastic-perfectly plastic Drucker-Prager model. The author made the numerical calculations under static live loads for the corrugated steel plate culvert with a span of 12.315 m and height of shell of 3.555 m. Soil cover over the shell crown was equal to 1.0 m. The steel shell consisted of the sheets of the corrugation of 0.14×0.38 m and plate thickness of 0.0071 m. The main aim of this paper is to present the impact of backfill quality (internal friction angle, unit weight, Young’s modulus) on the effort of the steel shell. The paper also shows the numerical calculations for the actual culvert, which previously had been studied experimentally. The author compared the obtained numerical results to the results of experiments. Parametric analysis showed that the angle of internal friction was a major factor in corrugated steel plate culverts. Considering the entire width of the corrugated steel plate culvert, the calculation model II was most favourable. The proposed method of modelling of the corrugated steel plate culvert allowed obtaining reasonable values of displacements and stresses in comparison to experimental results.

THE EFFECT OF METACOGNITIVE INSTRUCTION ON MAXIMIZING EFL LEARNERS’ METACOGNITIVE AWARENESS IN LISTENING

2018 ◽  
Vol 7 (1) ◽  
pp. 8-17
Author(s):  
Mahsa Assadi
Keyword(s):  
Experimental Research ◽  
Listening Comprehension ◽  
Intervention Program ◽  
Metacognitive Awareness ◽  
Listening Test ◽  
Efl Learners ◽  
Metacognitive Instruction ◽  
Before And After ◽  
Comprehension Ability ◽  
The Impact

This study reports a pre-experimental research on the impact of metacognitive instruction on EFL learners’ metacognitive awareness and their listening performance. To obtain the goal of the study, a group of 30 Iranian intermediate EFL learners, including 14 males and 16 females, were selected randomly. Their ages range from 20 to 24. The participants took part in 16 weeks’ intervention program based on metacognitive pedagogical sequence consisted of five stages. The metacognitive awareness listening questionnaire (MALQ), and a listening test were also used to find changes in metacognitive awareness and listening performance before and after the treatment. The results of comparing pre and posttests scores revealed that metacognitive instruction raised the learners’ metacognitive awareness and helped them improve their listening comprehension ability.

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