Mechanical Tests Performed on Rubber Plates Used on Railway Vehicles

In order to place a product on the market that is completely safe for users, the manufacturer must go through certain steps: design, prototyping, execution and prototype validation through experimental methods, obtaining documents that allow to sell the product from certain public or private companies (for example homologation certificate) and series production. One of the most important steps is the validation tests of the prototype because it will depend on them that the prototype corresponds to the design requirements.

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DESIGN AND ANALYSIS OF A PAPER SHREDDER MACHINE

Acta Tecnología ◽

10.22306/atec.v7i3.117 ◽

2021 ◽

Vol 7 (3) ◽

pp. 93-97

Author(s):

Tran Tung ◽

Luong Ngoc ◽

Nguyen Quynh ◽

Tran Minh

Keyword(s):

Series Production ◽

Optimal Model ◽

Private Companies ◽

Secure Information ◽

The Future ◽

Machine Parts

A paper shredder machine is a device that can shred documents such as paper and plastic into small strips or shreds. Private companies use it to shred confidential private documents or other sensitive documents into small strips or rubble. Thus, these machines help secure information effectively and waste to the environment. The article offers an alternative to the design and calculation of a shredder model. In addition, the options for optimizing the cutting blade and evaluating the strength of machine parts are also discussed to ensure the reasonable of the model. The analysis results are carried out with CATIA software. The results can serve as a prerequisite for an optimal model of the shredder that will go into series production in the future.

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Performance Assessment of Precast RC Flooring Units Exposed 40 Years in Aggressive Industrial Environment

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.711.737 ◽

2016 ◽

Vol 711 ◽

pp. 737-744

Author(s):

Radu Pascu ◽

Dan Paul Georgescu ◽

Adelina Apostu

Keyword(s):

Steel Industry ◽

Experimental Methods ◽

Mechanical Tests ◽

Knowledge Level ◽

Industrial Environment ◽

Aggressive Environment ◽

Observed Damage ◽

Non Destructive ◽

Non Destructive Techniques

Performance of RC members is tightly closed to their environment. A long exposition time in aggressive environment corresponds frequently with the use of RC elements designed and produced in an epoch when technical norms, reflecting the knowledge level of the time, were insufficient to insure the durability of the elements.This paper presents the assessment of precast flooring units after 40 years of exposition in an aggressive industrial environment, specific to the steel industry. The assessment was performed using chemical and mechanical tests performed in situ and in the laboratory, using destructive as well as non-destructive techniques, applied at material and member level. Experimental methods were corroborated with calculation results.The paper presents also the steps which were taken in order to asses the performance of the concrete structural elements.The results of this study allow concluding about the causes which led to the observed damage and the identification of the remedial measures needed to restore the security of the investigated elements.

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The Investigation of Partial Penetration Lap Laser Welding Applied on Stainless Steel Railway Vehicles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.3832 ◽

2010 ◽

Vol 97-101 ◽

pp. 3832-3835 ◽

Cited By ~ 2

Author(s):

Hong Xiao Wang ◽

Chun Sheng Wang ◽

Chun Yuan Shi ◽

Jing Fei Xiao

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Spot Welding ◽

Welding Process ◽

Mechanical Tests ◽

Optimal Parameters ◽

Railway Vehicles ◽

Partial Penetration ◽

Weak Points ◽

Laser Welding Process

The current stainless steel railway vehicles body and structure are usually assembled by resistance spot welding process. The weak points of this process are the poor surface quality and bad airtight due to the pressure of electrodes. In this study, the partial penetration lap laser welding process was investigated to resolve the problems. The effects of the laser welding process parameters such as laser power, welding speed and focused distance to the shape of the weld seam and the shear tensile strength were discussed to find the optimal parameters. And the mechanical tests and microstructure analysis were also taken in this study. The optimal parameters are P=2.0kW，S=22mm/s，F=0mm. This work has great significance of improving the manufacturing level of stainless steel railway vehicles.

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Identification of Glass Alloy Elastic Constants Using Rod Samples

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.827.352 ◽

2016 ◽

Vol 827 ◽

pp. 352-355

Author(s):

Karel Vítek

Keyword(s):

Elastic Constants ◽

Modulus Of Elasticity ◽

Tensile Tests ◽

Experimental Methods ◽

Mechanical Tests ◽

Materials Used ◽

Curved Rod ◽

Glass Beam ◽

Displacement Measurements ◽

Glass Alloy

The methodology, used for determining the structure material elastic constants, is based on mechanical tests, being mostly tensile ones, applied on partially loaded specimens. There be can glass materials used as different alloy elements, therefore the glass elastic constants can vary considerably. However, using classic glass tensile specimens for tensile tests can be problematic, due to their production and implementation of tensile tests. Experimental methods for identifying the glass Young's modulus of elasticity and Poisson's ratio are based on a comparison of the displacement measurements applied on the glass beam, or curved rod, samples, combined with their displacements calculation.

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Design Requirements for Annulus Fibrosus Repair: Review of Forces, Displacements, and Material Properties of the Intervertebral Disk and a Summary of Candidate Hydrogels for Repair

Journal of Biomechanical Engineering ◽

10.1115/1.4032353 ◽

2016 ◽

Vol 138 (2) ◽

Cited By ~ 50

Author(s):

Rose G. Long ◽

Olivia M. Torre ◽

Warren W. Hom ◽

Dylan J. Assael ◽

James C. Iatridis

Keyword(s):

Material Properties ◽

Annulus Fibrosus ◽

Intervertebral Disk ◽

Screening Tests ◽

Pubmed Database ◽

Design Requirements ◽

Validation Tests ◽

In Vivo Validation

There is currently a lack of clinically available solutions to restore functionality to the intervertebral disk (IVD) following herniation injury to the annulus fibrosus (AF). Microdiscectomy is a commonly performed surgical procedure to alleviate pain caused by herniation; however, AF defects remain and can lead to accelerated degeneration and painful conditions. Currently available AF closure techniques do not restore mechanical functionality or promote tissue regeneration, and have risk of reherniation. This review determined quantitative design requirements for AF repair materials and summarized currently available hydrogels capable of meeting these design requirements by using a series of systematic PubMed database searches to yield 1500+ papers that were screened and analyzed for relevance to human lumbar in vivo measurements, motion segment behaviors, and tissue level properties. We propose a testing paradigm involving screening tests as well as more involved in situ and in vivo validation tests to efficiently identify promising biomaterials for AF repair. We suggest that successful materials must have high adhesion strength (∼0.2 MPa), match as many AF material properties as possible (e.g., approximately 1 MPa, 0. 3 MPa, and 30 MPa for compressive, shear, and tensile moduli, respectively), and have high tensile failure strain (∼65%) to advance to in situ and in vivo validation tests. While many biomaterials exist for AF repair, few undergo extensive mechanical characterization. A few hydrogels show promise for AF repair since they can match at least one material property of the AF while also adhering to AF tissue and are capable of easy implantation during surgical procedures to warrant additional optimization and validation.

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Structure-property relationships of PE/PP sandwiched films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100126998 ◽

1987 ◽

Vol 45 ◽

pp. 454-455

Author(s):

J. Petermann ◽

G. Broza ◽

U. Rieck ◽

A. Jaballah ◽

A. Kawaguchi

Keyword(s):

Mechanical Tests ◽

Polymer Materials ◽

Ionic Crystals ◽

Structure Property ◽

Polymer Systems ◽

Structure Property Relationships ◽

Oriented Films ◽

Materials Used ◽

Polymer Laminates ◽

Heated Glass

Oriented overgrowth of polymer materials onto ionic crystals is well known and recently it was demonstrated that this epitaxial crystallisation can also occur in polymer/polymer systems, under certain conditions. The morphologies and the resulting physical properties of such systems will be presented, especially the influence of epitaxial interfaces on the adhesion of polymer laminates and the mechanical properties of epitaxially crystallized sandwiched layers.Materials used were polyethylene, PE, Lupolen 6021 DX (HDPE) and 1810 D (LDPE) from BASF AG; polypropylene, PP, (PPN) provided by Höchst AG and polybutene-1, PB-1, Vestolen BT from Chemische Werke Hüls. Thin oriented films were prepared according to the method of Petermann and Gohil, by winding up two different polymer films from two separately heated glass-plates simultaneously with the help of a motor driven cylinder. One double layer was used for TEM investigations, while about 1000 sandwiched layers were taken for mechanical tests.

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