Dynamische Meßfehler beim Zugversuch an einer kleinen Prüfmaschine des Pendeltyps / Dynamic measuring errors during the tensile test on a small testing machine of the pendulum type / Erreurs dynamiques de mesure au cours de l’essai de traction sur une machine d’essai de traction a petit modele du type pendulaire

The change in static and dynamic characteristics of polypropylene (PP) of grade H110MA by adding 2% multi walled carbon nanotubes (MWCNT) was investigated experimentally in this paper. The nanocomposite material is prepared by mixing neat PP and MWCNT in an extruder in a specified proportion. The extruded material is then used in an injection molding machine to make tensile test and impact test specimen. Tensile test specimen is tested on universal testing machine (UTM) to check the Young’s modulus of nanocomposite material. The impact test specimen is used to find the dynamic characteristics of this material by using the technique of experimental modal analysis using Single point Laser Doppler Vibrometer (SLDV), modal hammer and FFT analyzer. The scanning electron microscopic (SEM) images were taken to check the orientation and dispersion of carbon nanotubes in polypropylene.

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Damage Identification of Low Carbon Steel under Tensile Based on Elastic Modulus

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1061-1062.3 ◽

2014 ◽

Vol 1061-1062 ◽

pp. 3-6

Author(s):

Yu Jun Xue ◽

Shuang Shuang Liu ◽

Ji Shun Li ◽

Fang Yang

Keyword(s):

Elastic Modulus ◽

Carbon Steel ◽

Tensile Test ◽

Damage Identification ◽

Testing Machine ◽

Low Carbon Steel ◽

Tensile Specimen ◽

Low Carbon ◽

Machine Loading ◽

Tensile Process

Tensile test of low carbon steel was carried out on a universal electronic testing machine. Loading and strain test data of low carbon steel was acquired by means of the tensile test. Based on the measured tensile specimen data, elastic modulus of low carbon steel was calculated. It was found that elastic modulus of low carbon steel varied during tensile process. The damage of low carbon steel under tensile was identified by the calculation of elastic modulus.

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Microstructure and mechanical properties of AISI 439 ferritic stainless steel welds without filler metal

Acta Universitaria ◽

10.15174/au.2019.2351 ◽

2019 ◽

Vol 29 ◽

pp. 1-12

Author(s):

Juan Manuel Salgado López ◽

Marc Preud homme ◽

Francisco Lopez Monroy ◽

Jose Luis Ojeda Elizarráraz ◽

Arturo Toscano Giles

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Tensile Test ◽

Grain Growth ◽

Ferritic Stainless Steel ◽

Filler Metal ◽

Testing Machine ◽

Thin Plates ◽

Technical Literature ◽

Steel Welds

In literature, it has been reported that a current intensity lower than 120 A leads to a microstructure without grain growth in the heat affected zone (HAZ) of ferritic stainless steel welds. Nevertheless, in technical literature there is little information about the reduction in mechanical properties of ferritic stainless steel welds without filler metal due to grain growth in the HAZ. In this work, thin plates of ferritic stainless 439 steel were welded using pulse current gas tungsten arc welding (P-GTAW) without filler metal. The microstructures in the HAZ were analyzed and the mechanical properties on the welded joint were found by tensile test. This was carried out by cutting samples for the tensile test from the weldments and then tested in a universal testing machine. The fracture surface were observed using scanning electron microscope.

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Thermal Degradation and Mechanical Behavior of Banana Pseudo-Stem Reinforced Composites

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d8812.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 5899-5902

Keyword(s):

Thermal Stability ◽

Tensile Test ◽

Composite Structures ◽

Testing Machine ◽

Banana Fiber ◽

Thermogravimetric Analyzer ◽

Surface Method ◽

Epoxy Resin System ◽

Tensile Data ◽

Tg And Dtg

Banana fiber has potential to be utilized in bio-based composite structures due to its low price, abundantly available and biodegradability. However, the performance of this fiber is still not comparable to the synthetic polymeric system. In this work, the thermal stability analysis and tensile test of optimized banana fiber that was initially evaluated using response surface method were conducted. The thermal analysis and the tensile test were conducted using thermogravimetric analyzer and universal testing machine respectively. It was shown that the banana fiber content offered an outstanding performance in thermal stability. The highest thermal stability however, was found in neat epoxy resin system. The TG and DTG results showed the lowest amount of residue occurred in banana/epoxy composite. The tensile data properties revealed that banana composite is comparable to synthetic samples

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Mechanical and Rheological Behaviour of Composites Reinforced with Natural Fibres

Polymers ◽

10.3390/polym12061402 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1402 ◽

Cited By ~ 2

Author(s):

Mariana D. Stanciu ◽

Horatiu Teodorescu Draghicescu ◽

Florin Tamas ◽

Ovidiu Mihai Terciu

Keyword(s):

Tensile Test ◽

Testing Machine ◽

Rheological Behaviour ◽

Wood Particle ◽

Mechanical Analysis ◽

Natural Fibre ◽

Reinforced Composites ◽

Fibre Composites ◽

Wood Particles ◽

Structure Lead

The paper deals with the mechanical behaviour of natural fibre composites subjected to tensile test and dynamic mechanical analysis (DMA). Three types of natural fibre composites were prepared and tested: wood particle reinforced composites with six different sizes of grains (WPC); hemp mat reinforced composites (HMP) and flax reinforced composite with mixed wood particles (FWPC). The tensile test performed on universal testing machine LS100 Lloyd’s Instrument highlights the elastic properties of the samples, as longitudinal elasticity modulus; tensile rupture; strain at break; and stiffness. The large dispersion of stress–strain curves was noticed in the case of HMP and FWPC by comparison to WPC samples which present high homogeneity of elastic–plastic behaviour. The DMA test emphasized the rheological behaviour of natural fibre composites in terms of energy dissipation of a material under cyclic load. Cole–Cole plots revealed the connection between stored and loss heat energy for studied samples. The mixture of wood particles with a polyester matrix leads to relative homogeneity of composite in comparison with FWPC and HMP samples which is visible from the shape of Cole–Cole curves. The random fibres from the hemp mat structure lead to a heterogeneous nature of composite structure. The elastic and viscous responses of samples depend on the interface between fibres and matrix.

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Retentiveness comparison of individual clasps made from polyamide, acetate resin and cobalt-chrome for removable partial dentures

Brazilian Dental Science ◽

10.14295/bds.2019.v22i4.1802 ◽

2019 ◽

Vol 22 (4) ◽

pp. 483-487

Author(s):

Juan Cruz Mutto ◽

Tabata Prado Sato ◽

João Mauricio Ferraz Da Silva ◽

Alexandre Luiz Souto Borges ◽

Eduardo Shigueyuki Uemura

Keyword(s):

Tensile Test ◽

Artificial Saliva ◽

Testing Machine ◽

Cobalt Metal ◽

Removable Partial Denture ◽

Partial Denture ◽

Retention Force ◽

Universal Testing ◽

Cobalt Chrome ◽

Good Retention

Objective: This study aimed to evaluate and compare the retention force of individual clasps made from polyamide, acetate resin and cobalt-chrome for removable partial dentures. Material and methods: Three groups of clasps were fabricated: Cr-Co - 10 conventional chrome-cobalt metal clasps; Ac - 10 clasps with reciprocal arms and occlusal rests in chrome-cobalt and retentive arms in acetate resin; and Poly - 10 clasps with reciprocal arms and occlusal rests in chrome-cobalt and retentive arms in polyamide resin. Through the tensile test, in a universal testing machine, the initial retention force of the specimens was obtained and then clasps were cycled 7200 times, immersed in artificial saliva (60 months of simulated clinical use). After cycling, tensile test was performed. Results: All groups presented a retention decrease after the cycling. Ac presented a large reduction in retentive force (61.43%), followed by Cr-Co (26.5%) and Poly (12.09%). Conclusions: Aesthetic clasps of polyamide can be used in clinical cases where the anterior supporting teeth will not be essential for good retention of the removable partial denture because this clasp showed to be more resistant than the acetate resin.

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V-Groove Shape Effect on Tensile Strength of Metal Inert Gas Aluminum to Steel Welding Process

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d7116.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 755-759

Keyword(s):

Tensile Strength ◽

Tensile Test ◽

Testing Machine ◽

Inert Gas ◽

Filler Material ◽

Welding Parameters ◽

Shape Effect ◽

Groove Shape ◽

The Impact ◽

Welding Processes

The objective of this research to study the impact of v-groove shape on Metal Inert Gas welding procedure of 6mm thickness A6061 aluminum combination and 304 Stainless steel in overlap configuration with welding parameters as; voltage, wire feed rate and shielding gas are 17 volts, 2m/min and 15L/min respectively, the experiment was performed in which the aluminum is upper. 1-mm diameter of ER4042 filler material and pure argon gas as shielded gas. V-groove shapes in steel samples were made with angle 450 . The experiment conducted using SYNERGIC.PRO2 450-4 machine. Tensile test was carried out for each welded sample Universal Testing Machine of MIG welding processes with and without v-grove in steel side. Tensile strengths of welded test samples vary from 15.8 N/mm2 to 26.24 N/mm2 contingents on the welding conditions. The results indicated that v-groove specimens have a maximum strength of tensile strength of 26,24 N / mm2 compared to v-groove samples. It shows the ability to mount inert gas / brazing process aluminum to steel by means of a reversed groove angle and to maximize welding parameters. In conjunction with the half-V-shaped groove the smallest temperature gradient along the steel interface was noted to the smallest difference from top to bottom with IMC thicken values. Tensile test results showed that, owing to its outstanding diffusion behavior of filled filler material, the maximum bonding interface and the correct IMC interface distribution on the steel surface.

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Determination of Constant Parameters of Copper as Power-Law Hardening Material at Different Test Conditions

International Journal of Applied Mechanics and Engineering ◽

10.2478/ijame-2014-0047 ◽

2014 ◽

Vol 19 (4) ◽

pp. 687-698

Author(s):

Md. A. Kowser ◽

Md. Mahiuddin

Keyword(s):

Heat Treatment ◽

Tensile Test ◽

Power Law ◽

Testing Machine ◽

Strain Curve ◽

Gauge Length ◽

Material Strength ◽

Stress Strain ◽

Cross Sectional ◽

Hardening Material

Abstract In this paper a technique has been developed to determine constant parameters of copper as a power-law hardening material by tensile test approach. A work-hardening process is used to describe the increase of the stress level necessary to continue plastic deformation. A computer program is used to show the variation of the stress-strain relation for different values of stress hardening exponent, n and power-law hardening constant, α . Due to its close tolerances, excellent corrosion resistance and high material strength, in this analysis copper (Cu) has been selected as the material. As a power-law hardening material, Cu has been used to compute stress hardening exponent, n and power-law hardening constant, α from tensile test experiment without heat treatment and after heat treatment. A wealth of information about mechanical behavior of a material can be determined by conducting a simple tensile test in which a cylindrical specimen of a uniform cross-section is pulled until it ruptures or fractures into separate pieces. The original cross sectional area and gauge length are measured prior to conducting the test and the applied load and gauge deformation are continuously measured throughout the test. Based on the initial geometry of the sample, the engineering stress-strain behavior (stress-strain curve) can be easily generated from which numerous mechanical properties, such as the yield strength and elastic modulus, can be determined. A universal testing machine is utilized to apply the load in a continuously increasing (ramp) manner according to ASTM specifications. Finally, theoretical results are compared with these obtained from experiments where the nature of curves is found similar to each other. It is observed that there is a significant change of the value of n obtained with and without heat treatment it means the value of n should be determined for the heat treated condition of copper material for their applications in engineering fields.

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Fundamental Investigation for Tensile Test Using Conical Cupping Die

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.622-623.292 ◽

2014 ◽

Vol 622-623 ◽

pp. 292-299 ◽

Cited By ~ 1

Author(s):

Tomoyuki Ota ◽

Takashi Iizuka

Keyword(s):

Tensile Test ◽

Testing Machine ◽

Forming Limit Diagram ◽

Forming Limit ◽

Uniaxial Tensile ◽

Bulge Test ◽

Uniaxial Tensile Test ◽

Biaxial Tensile ◽

Specimen Shape ◽

Specimen Edge

A number of researches have conducted in order to evaluate the ductile fracture occurrence by using forming limit diagram. However, specimen shape and testing machine for obtaining forming limit diagram of sheet metal have some problems. The problem about specimen shape is occurring at the specimen edge. In uniaxial tensile test, the specimen edge may cause a defused neck in width direction and may have influence on fracture occurrence. In biaxial tensile test by using a cruciform specimen, a uniform biaxial deformation is not obtained because uniaxial tensile stress occurs at the specimen edge. Tensile test by using a specimen which does not have such edges should carry out, for example, in bulge test and multi-axial tube expansion test, specimens without edge are used. However, these methods need special machines. Therefore, new biaxial tensile testing method is required. By this method, materials deform depending on biaxial strain state by using popular pressing machines.

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