Effect of Strength Parameters and the Structure of Steel Cord Conveyor Belts on Belt Puncture Resistance

2014 ◽  
Vol 683 ◽  
pp. 119-124 ◽  
Author(s):  
Henryk Komander ◽  
Miroslaw Bajda ◽  
Grzegorz Komander ◽  
Gabriela Paszkowska
Keyword(s):  
Research Work ◽  
Impact Resistance ◽  
Conveyor Belt ◽  
Laboratory Research ◽  
Monitoring Methods ◽  
Strength Parameters ◽  
Puncture Resistance ◽  
Conveyor Belts ◽  
Steel Cord ◽  
The Impact

Conveyor belts transporting rock material are getting worn out mainly as a consequence of punctures and cuts caused by impacts of rock lumps in the belt loading zone. To enhance the operational durability of conveyor belts multidirectional actions intended to lower the dynamic load of belts, to increase the belt impact resistance and to monitor the belt condition are undertaken. Some significant improvements can be achieved by decreasing the material fall height, by implementation of transported material slides in transfer chutes and shock absorbing belt supports as well as by reducing rock lump sizes. To avoid extensive wear belt monitoring methods are being developed, so that belt defect numbers, sizes, and locations can be identified [1]. Implementation of monitoring prevents sudden belt tear and enables rational belt management by repairing and regenerating belts in the optimum time. Laboratory research programmes aim at identifying the relation of the dynamic stress and the belt fatigue strength [2,3]. Investigations of the effect of strength parameters and the structure of steel cord conveyor belts on their puncture resistance are carried out since many years [4,5,6,7]. High puncture resistance of a conveyor belt is one of the main assessment criteria of its operational durability. Research work on the impact of belt top cover thickness, cover rubber properties and type of belt crosswise reinforcements on the belt puncture resistance was undertaken in the Laboratory of Belt Transportation (LBT) of Wroclaw University of Technology [8].

Interplay of fabric structure and shear thickening fluid impregnation in moderating the impact response of high-performance woven fabrics

2020 ◽  
Vol 54 (28) ◽  
pp. 4387-4395
Author(s):  
Sanchi Arora ◽  
Abhijit Majumdar ◽  
Bhupendra Singh Butola
Keyword(s):  
Beneficial Effect ◽  
Energy Absorption ◽  
Impact Energy ◽  
High Performance ◽  
Research Work ◽  
Impact Resistance ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Fabric Structure ◽  
The Impact

The beneficial effect of STF impregnation in enhancing the impact resistance of high-performance fabrics has been extensively reported in the literature. However, this research work reports that fabric structure has a decisive role in moderating the effectiveness of STF impregnation in terms of impact energy absorption. Plain woven fabrics having sett varying from 25 × 25 inch−1 to 55 × 55 inch−1 were impregnated with STF at two different padding pressures to obtain different add-ons. The impact energy absorption by STF impregnated loosely woven fabrics was found to be higher than that of their neat counterparts for both levels of add-on, while opposite trend was observed in case of tightly woven fabrics. Further, comparison of tightly woven plain, 2/2 twill, 3/1 twill and 2 × 2 matt fabrics revealed beneficial effect of STF impregnation, except for the plain woven fabric, establishing that there exists a fabric structure-STF impregnation interplay that tunes the impact resistance of woven fabrics.

scholarly journals Impact Resistance of Ternary Concrete Using Scba and Silica Fume as Partial Substitute of Cement in Concrete

2019 ◽  
Vol 8 (9) ◽  
pp. 1330-1334
Keyword(s):  
Silica Fume ◽  
Research Work ◽  
Impact Resistance ◽  
Bottom Ash ◽  
Optical Microscope ◽  
Dynamic Loads ◽  
Normal Concrete ◽  
Concrete Mix ◽  
The Impact ◽  
By Products

Concrete structures inevitably encounter dynamic loads throughout the planning lifetime of structure. Impact resistance is necessary factor for evaluate the dynamic concert of concrete. To fulfill the necessities of strength and toughness properties of concrete we have a tendency to use the industrial by-products likecoal bottom ash, silica fume, metakaolin, etc., as supplementary building material. During this research work the experimental investigation was investigation to gauge the Impact resistance of TBASF concrete mixby cement is partially substitute with silica fume 10% and also the SCBA 0%, 5%, 10%, 15%, 20% and 25%. The Impact resistance of TBASF concrete mix is additionally compared with normal concrete. This study is additionally conducting elaborated investigation of TBASF concrete for mineralogical properties by using Optical microscope and XRD keeping Impact resistance in view. The maximumpercentage of SCBA is obtained at 15% replacement of cement.

scholarly journals Dynamic Model of Impact Energy Absorption by a Conveyor Belt in Interaction with the Support System

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 64
Author(s):  
Daniela Marasova ◽  
Miriam Andrejiova ◽  
Anna Grincova
Keyword(s):  
Dynamic Model ◽  
Energy Absorption ◽  
Support System ◽  
Impact Energy ◽  
Dynamic Load ◽  
Conveyor Belt ◽  
Mathematical Statistics ◽  
Conveyor Belts ◽  
Process Damage ◽  
The Impact

Measurements of the dynamic load of conveyor belts of identical strengths were used to evaluate and compare the data for belts with and without a support system. The goal was to identify the effects of the support system in terms of a relative amount of impact energy absorbed by a conveyor belt. A dynamic model was designed based on selected parameters of the impact process. Damage to conveyor belts, caused by the absorption of impact energy, was evaluated using the applied methods of mathematical statistics.

scholarly journals Analysis of Strength Factors of Steel Cord Conveyor Belt Splices Based on the FEM

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Xianguo Li ◽  
Xinyu Long ◽  
Zhenqian Shen ◽  
Changyun Miao
Keyword(s):  
Carrying Capacity ◽  
Simulation Analysis ◽  
Conveyor Belt ◽  
Pullout Force ◽  
Operational Safety ◽  
Steel Cords ◽  
Conveyor Belts ◽  
Steel Cord ◽  
Simulation Results ◽  
Cord Length

Conveyor belt is an important element of the conveyor. The strength of the steel cord conveyor belt largely determines the carrying capacity, and it also has a great impact on operational safety. In this paper, the effect of different factors on the strength of the steel cord conveyor belt splices was studied. The FEM was used for simulation analysis, and the corresponding tensile experiments were carried out to verify. Steel cords of different lengths were simulated, and the simulation results agree well with the experimental results. On this basis, the steel cord length, steel cord diameter, rubber thickness, and different number of steel cords were investigated to study the effect on the pullout force of the steel cord conveyor belt splice. The numerical simulation results show that different steel cord diameters have more significant effect on the strength of the conveyor belt splice compared to rubber. The steel cord length and steel cord diameter impact on the steel cord conveyor belt is approximately linear. For the different number of the steel cords, the increase in the number of steel cords does not mean that the tension will increase by the same multiple, and the increase in pullout force is less than the increase in the number of steel cords. It provides guidance for the production of steel cord conveyor belts.

scholarly journals Effect of Mortar Strength on the Behaviour of Ferrocement Panel Under Low Velocity Impact

2019 ◽  
Vol 8 (12) ◽  
pp. 5245-5249
Keyword(s):  
Construction Material ◽  
Equivalent Stress ◽  
Research Work ◽  
Impact Resistance ◽  
Low Velocity Impact ◽  
Construction Technology ◽  
Low Velocity ◽  
Velocity Impact ◽  
Mortar Strength ◽  
The Impact

The concept of industrialization of the construction technology has emerged as well accepted and preferred option in the field of building construction now days in order to reduce in – situ construction up to maximum extent. Ferrocement is the one of the relatively new cementitious composite considered as a construction material. The main aim of this study is to investigate the behavior of Ferrocement panel under low velocity impact. Size of panel is 250 x 250 mm and thickness is varying from 20mm to 40mm. Corrugated fibers were added in panels. Volume of corrugated fibers was considered as 1.5% of total volume of panel. Weld mesh and woven mesh were used in ferrocement panels. Numbers of layers of mesh were 2 and 3. Height of drop is 1m. M30 and M40 Grade of mortar were used. Equivalent stress, Normal stress and Deformation were the main parameters for this research work. From the results it can be concluded that weld mesh with corrugated fibers is good at the impact resistance.

Improving Energy Absorption and Dissipation of Composites Through Optimized Tayloring

2006 ◽  
Author(s):  
Laura Ferrero ◽  
Ugo Icardi
Keyword(s):  
Energy Dissipation ◽  
Energy Absorption ◽  
Computational Models ◽  
Vibration Suppression ◽  
Research Work ◽  
Impact Resistance ◽  
Structural Behaviour ◽  
Transfer Energy ◽  
Incoming Energy ◽  
The Impact

Fibre-reinforced and sandwich composites with laminated faces are the best candidate materials in many engineering fields by the viewpoint of the impact resistance, containment of explosions, protection against projection of fragments, survivability and noise and vibration suppression. Besides, they offer the possibility to be tailored to meet design requirements. A great amount of the incoming energy is absorbed through local failures. The most important energy dissipation mechanisms are the hysteretic damping in the matrix and in the fibers and the frictional damping at the fiber-matrix interface. The dissipation of the incoming energy also partly takes place as a not well understood dissipation at the cracks and delamination sites. As self-evident, the local damage accumulation mechanism on the one hand is helpful from the standpoint of energy absorption, on the other hand it can have detrimental effects. To date sophisticated computational models are available, by which the potential advantages of composites can be fully exploited. A large amount of research work has been oriented to improve the impact resistance, the dissipation of vibrations and to oppose the propagation of delamination. These goals can be obtained with incorporation of viscoelastic layers. Unfortunately this makes quite compliant the laminates and reduce their strength. Studies have been recently published that seeks to comply stiffness and energy dissipation. The existence of fiber orientations that are a good compromise between optimal stiffness and optimal absorption of the incoming energy can be supposed by the results of a number of published studies. In this paper, a variable spatial distribution of plate stiffnesses, as it can be obtained varying the orientation of the reinforcement fibres along the plate and their constituent materials, is defined by an optimization process, so to obtain a wanted specific structural behaviour. The key feature is an optimized strain energy transfer from different deformation modes, such as bending, in-plane and out-of-plane shears. Suited plate stiffness distributions which identically fulfil the thermodynamic and material constraints are found that make stationary the energy contributions and transfer energy between the modes as desired. An application to low velocity impacts and to blast pulse loads is presented. The use of the optimized layers with the same mean properties of the layers they substitute were shown to reduce deflection and the stresses that induce delamination. A new discrete layer element is developed in this study, to accurately account for the local effects. Characteristic feature, it is based on a C° in-plane approximation and a general representation across the thickness which can either represent the kinematics of conventional plate models or the piecewise variation of layerwise models.

Mathematical Modelling of the Process of Conveyor Belt Damage Caused by the Impact Stress

2014 ◽  
Vol 683 ◽  
pp. 153-158 ◽  
Author(s):  
Vladimír Taraba ◽  
Daniela Marasová ◽  
Dušan Kubala ◽  
Vladimír Semjon
Keyword(s):  
Mathematical Modelling ◽  
Conveyor Belt ◽  
Dynamic Force ◽  
Maximum Magnitude ◽  
The Finite Element Method ◽  
Impact Stress ◽  
Steel Cord ◽  
Supporting Rollers ◽  
The Impact ◽  
Principal Strains

The article presents the results of the mathematical modelling of the strain and deformation conditions in the steel-cord conveyor belt of the ST 2000 and ST 2500 types, applying the Finite Element Method. The output of the model is identification of the maximum magnitude of the activated dynamic force in the conveyor belt on the basis of the analysis of vertical shifts of the loaded point, vertical strains in the area of supporting rollers, and the maximum principal strains.

scholarly journals Statistical Analysis and Neural Network in Detecting Steel Cord Failures in Conveyor Belts

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3081
Author(s):  
Dominika Olchówka ◽  
Aleksandra Rzeszowska ◽  
Leszek Jurdziak ◽  
Ryszard Błażej
Keyword(s):  
Neural Network ◽  
Statistical Analysis ◽  
Conveyor Belt ◽  
Data Sets ◽  
Two Dimensional ◽  
Two Dimensional Image ◽  
Second Stage ◽  
Conveyor Belts ◽  
Steel Cord

This paper presents the identification and classification of steel cord failures in the conveyor belt core based on an analysis of a two-dimensional image of magnetic field changes recorded using the Diagbelt system around scanned failures in the test belt. The obtained set of identified changes in images, obtained for numerous parameters settings of the device, were the base for statistical analysis. This analysis makes it possible to determine the Pearson’s linear correlation coefficient between the parameters being changed and the image of the failures. In the second stage of the research, artificial intelligence methods were applied to construct a multilayer neural network (MLP) and to teach it appropriate identification of damage. In both methods, the same data sets were used, which made it possible to compare methods.

Belt Damage Aspect to Impact Loading

2014 ◽  
Vol 683 ◽  
pp. 102-107 ◽  
Author(s):  
Ľubomír Ambriško ◽  
Vladimír Taraba ◽  
Stanislav Szabo ◽  
Martin Leco
Keyword(s):  
Design Of Experiments ◽  
Support System ◽  
Impact Loading ◽  
Impact Load ◽  
Conveyor Belt ◽  
Limit Value ◽  
Tension Load ◽  
Conveyor Belts ◽  
Effect Of The Support ◽  
The Impact

This paper presents the results of rubber products testing (rubber conveyor belt type P 2000/4, 8+4) with regard to their quality in order to establish the limit value of impact load, i.e. establish the maximum breakdown resistance. Outputs of measurements are in addition to the impact load also duration of impact, size of tension load and determination the effect of the support system for conveyor belts breakdown resistance. Using Design of Experiments method are identified factors that significantly affect the value of the impact load.

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