scholarly journals A study on the influence of the loading rate and orientation on some mechanical properties of cassava tubers of different ages

2021 ◽  
Author(s):  
Olawale Charles Ogunnigbo ◽  
Adetan Dare ◽  
Morakinyo Tunde ◽  
Olusunmade Olusola ◽  
Ojerinde Joshua
Keyword(s):  
Mechanical Properties ◽  
Loading Rate ◽  
Testing Machine ◽  
Longitudinal Direction ◽  
Universal Testing Machine ◽  
Loading Direction ◽  
Universal Testing ◽  
Longitudinal Loading ◽  
Different Ages ◽  
Design And Construction

The study determined the effects of the speed of loading and the loading orientation on some selected mechanical properties of the TME 419 cassava tuber variety at different ages of the tuber which are essential in the design and construction of the processing and handling equipment of a cassava peeler. The properties considered include the bioyield and rupture points, compressive and rupture strengths, toughness and firmness, and moduli of stiffness and toughness, which were carried out in the transverse and longitudinal loading direction using an Instron Universal Testing Machine (UTM). As the loading rate increased from 5.00 to10.00 mm·min<sup>–1</sup> and the age of the tuber varies from 1.00 to 2.00 years, the bioyield and rupture points, compressive and rupture strengths, toughness, firmness, moduli of stiffness and toughness in the transverse and longitudinal direction varies from 1 619.61 to 3 636.19 N and 136.08 to 384.52 N, 0.48066 to 1.07913 N·mm<sup>–2 </sup>and 0.26604 to 0.75173 N·mm<sup>–2</sup>, 766 to 1055 N·mm<sup>–1</sup> and 1 262 to 2 965 N·mm<sup>–1</sup>, 303.98 to 553.68 mm·min<sup>–1</sup> and 28.08 to 53.71 mm·min<sup>–1</sup> 2.30 to 4.19 N·mm<sup>–2</sup> and 5.376 to 8.94N·mm<sup>–2 </sup>respectively. Generally, the values of the properties examined are higher in the longitudinal loading orientation than in the transverse and for a year and half old tuber which will be useful in designing an efficient cassava peeling system.

Improvement of Thermal and Ablative Properties of Phenolic Resin by SiC and MMT

2016 ◽  
Vol 707 ◽  
pp. 8-12
Author(s):  
Keeratikarn Kuttiwong ◽  
Jantrawan Pumchusak
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Thermogravimetric Analysis ◽  
Phenolic Resin ◽  
Testing Machine ◽  
Hot Compression ◽  
Thermal Stabilities ◽  
Universal Testing Machine ◽  
Universal Testing

In this work, the improvement of thermal and ablative properties of the phenolic resin by the addition of silicon carbide (SiC) and montmorillonite (MMT) were studied. The phenolic composites were fabricated by hot compression. The thermal stabilities, mechanical properties and ablative properties of the neat phenolic resin and the SiC/MMT phenolic composites were examined using a Lloyd universal testing machine, thermogravimetric analysis (TGA) and ablation tests (an oxyacetylene torch), respectively. Mass ablation rates were measured after flame exposure. The results showed that SiC/MMT provided the higher thermal stabilities and lower ablation rates to the phenolic resin.

Effect of Alloying Elements on the Microstructure and Properties of AZ91D-xCa-ySr

2012 ◽  
Vol 591-593 ◽  
pp. 993-996
Author(s):  
Qing Zhu Sun ◽  
Hai Bo Wang ◽  
Yong Chang Zhu
Keyword(s):  
Mechanical Properties ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Alloying Elements ◽  
Cycle Fatigue ◽  
Microstructure And Properties ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Electronic Microscope

In this paper, the microstructure and properties of AZ91D-xCa-ySr were studied by adding alloying elements. The mechanical properties were investigated by WDT-10 micro-electric universal testing machine and WD-T low cycle fatigue testing machine. The OLYMPUS-GX71 Optical electronic microscope, XRD and SEM were employed to investigate the microstructure of AZ91D. The results showed that the grains were refined by adding Ca,Sr,Gd and Y. Low cycle fatigue (LCF) behavior of AZ91D-0.4Ca-0.3Sr was improved obviously by adding 3.0%Gd and 3.0%Y into material, the tensile strengthen was up to 299Mpa, the elongation was 0.78%.

scholarly journals Comparison of different microstructure scaffolds for tissue regeneration

2016 ◽  
Author(s):  
Andžela Šešok ◽  
Deividas Mizeras ◽  
Algirdas Vaclovas Valiulis ◽  
Julius Griškevičius ◽  
Mangirdas Malinauskas
Keyword(s):  
Mechanical Properties ◽  
Tissue Regeneration ◽  
Low Cost ◽  
Testing Machine ◽  
Raw Material ◽  
Bending Tests ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
3D Printed

In this work we aim to determine the mechanical properties of 3D printed PLA objects having various orientation woodpile microarchitectures. In this work we chose three different 3D microarchitectures: woodpile BCC (each layer consists of parallel logs which are rotated 90 deg every next layer), woodpile FCC (every layer is additionally shifted half of the period in respect to the previous parallel log layer) and a rotating woodpile 60 deg (each layer is rotated 60 deg in respect to the previous one). Compressive and bending tests were carried out TIRAtest2300 universal testing machine. We found that 60 deg rotating woodpile geometry had the highest values which was approximately 3 times than the BCC or FCC log arrangements. Thus we prove that employing low-cost equipment and applying the same raw material one can create objects of desired rigidity.

scholarly journals Selected biometric and mechanical properties of the common reed Phragmites australis and the reed sweet grass Glyceria maxima rhizomes

2016 ◽  
Vol 48 (4) ◽  
pp. 289-297 ◽  
Author(s):  
Weronika Kowalik ◽  
Kinga Pachuta ◽  
Jerzy Jeznach
Keyword(s):  
Mechanical Properties ◽  
Phragmites Australis ◽  
Testing Machine ◽  
Common Reed ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Tensile Forces ◽  
The Common

Abstract The results on the selected biometric and mechanical properties of common reed Phragmites australis and reed sweet grass Glyceria maxima were presented. The experiments were conducted with the help of the universal testing machine Instron 5966. The underground biomasses, diameters, tensile forces, displacements and tensile strengths for summer and winter rhizomes of both species were assessed and compared. The final results indicate that rhizomes of common reed had higher values of the studied parameters of biometric and stretching than sweet reed grass rhizomes. Therefore, there are more opportunities to use them to protect the coastline.

Study on Microstructures and Mechanical Properties of AlSi9Cu3 Aluminum Alloy Fabricated by Liquid Forging

2011 ◽  
Vol 418-420 ◽  
pp. 353-356
Author(s):  
Sheng Li Li ◽  
Wei Lian Sun ◽  
Hui Qiang Wang ◽  
Bo Sun
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Testing Machine ◽  
Optical Microscope ◽  
Excellent Performance ◽  
Direct Reading ◽  
Forming Mechanism ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Microstructures And Mechanical Properties

Study the properties of AlSi9Cu3 aluminum alloy test bars fabricated by liquid forging with instruments such as optical microscope, direct reading spectrometer and micro-controlled electronic universal testing machine. Further more，analyze the microstructure and forming mechanism of AlSi9Cu3 aluminum alloy fabricated by liquid forging, the study shows : AlSi9Cu3 aluminum alloy fabricated by liquid forging has excellent performance and good prospects in production.

Experimental Investigation on Mechanical Properties of Wheat Husk Pulp Rein Forced Epoxy Composites

2020 ◽  
Vol 36 ◽  
pp. 114-125
Author(s):  
Kanwal Jit Singh ◽  
Rohit Kumar ◽  
Ramratan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Testing Machine ◽  
Weight Percentage ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
The Impact ◽  
Wheat Husk

The wheat husk pulp epoxy resin composites were prepared by compression Molding Method and their physical and Mechanical Properties were studied by universal testing Machine. The composites were tested by tensile strength testing and impact strength tester. The content of Wheat husk pulp is varied (35%, 45%, 55%) weight percentage whereas the epoxy resin is varied (50%, 40%, 30%) percentage is kept constant 15% in hardener. Composites have been fabricated using hand layup technique using a suitable mold developed in industry. All the sample have been tested in Universal testing machine as per ASTM standard for tensile strength and impact strength it is observed that composite with 35% wheat husk pulp is having highest tensile strength of 4mm (4.29MPa) and 8mm (6.31Mpa). The impact strength of Composite with 35% wheat husk pulp was highest than 35%to 45% wheat husk pulp.

scholarly journals Physical-Mechanical Properties of a Resin-Modified Calcium Silicate Material for Pulp Capping

2020 ◽  
Vol 31 (3) ◽  
pp. 252-256
Author(s):  
Taynnara Licéski Gasperi ◽  
Josiane de Almeida Cava da Silveira ◽  
Tamer Ferreira Schmidt ◽  
Cleonice da Silveira Teixeira ◽  
Lucas da Fonseca Roberti Garcia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Calcium Silicate ◽  
Testing Machine ◽  
Dimensional Change ◽  
Silicate Material ◽  
Pulp Capping ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Push Out

Abstract The purpose of this study was to investigate and to compare the physical-mechanical properties of a resin-modified calcium silicate material (TheraCal LC), used for pulp-capping, to MTA (Angelus) and a calcium hydroxide cement (Dycal). Specimens of each material (n=12) were prepared in Teflon molds (3.58 mm x 3 mm) and measured before and after immersion in distilled water for 24 h and 30 days to evaluate the dimensional change. The same specimens were submitted to compressive strength test on a Universal Testing Machine (Instron) (1 mm/min). Root canals were filled with the cements (n=8), and after 24 h, the bond strength (push-out test) to dentin was also assessed on a Universal Testing Machine (1 mm/min). Eight additional specimens of TheraCal LC were prepared to evaluate the bond strength immediately after light curing. Data were analyzed using One-Way ANOVA, and Tukey or Bonferroni post hoc tests (p<0.05). Percentage expansion of TheraCal LC was above the Specification No. 57 of ANSI/ADA, in both periods. The dimensional change for TheraCal LC was higher than MTA in 24 h and 30 days; and Dycal in 30 days (p<0.05). TheraCal LC had higher compressive and bond strength to dentin in comparison with MTA and Dycal (p<0.05). Although TheraCal LC expanded more than the ANSI/ADA recommendation, its compressive and push-out bond strength to dentin were satisfactory and superior to MTA and Dycal.

scholarly journals Mechanical Properties of the Composite Material consisting of β-TCP and Alginate-Di-Aldehyde-Gelatin Hydrogel and Its Degradation Behavior

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1303
Author(s):  
Michael Seidenstuecker ◽  
Thomas Schmeichel ◽  
Lucas Ritschl ◽  
Johannes Vinke ◽  
Pia Schilling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Protein Concentration ◽  
Failure Load ◽  
Testing Machine ◽  
Experimental Period ◽  
Flow Chamber ◽  
Degradation Behavior ◽  
Gelatin Hydrogel ◽  
Universal Testing

This work aimed to determine the influence of two hydrogels (alginate, alginate-di-aldehyde (ADA)/gelatin) on the mechanical strength of microporous ceramics, which have been loaded with these hydrogels. For this purpose, the compressive strength was determined using a Zwick Z005 universal testing machine. In addition, the degradation behavior according to ISO EN 10993-14 in TRIS buffer pH 5.0 and pH 7.4 over 60 days was determined, and its effects on the compressive strength were investigated. The loading was carried out by means of a flow-chamber. The weight of the samples (manufacturer: Robert Mathys Foundation (RMS) and Curasan) in TRIS solutions pH 5 and pH 7 increased within 4 h (mean 48 ± 32 mg) and then remained constant over the experimental period of 60 days. The determination surface roughness showed a decrease in the value for the ceramics incubated in TRIS compared to the untreated ceramics. In addition, an increase in protein concentration in solution was determined for ADA gelatin-loaded ceramics. The macroporous Curasan ceramic exhibited a maximum failure load of 29 ± 9.0 N, whereas the value for the microporous RMS ceramic was 931 ± 223 N. Filling the RMS ceramic with ADA gelatin increased the maximum failure load to 1114 ± 300 N. The Curasan ceramics were too fragile for loading. The maximum failure load decreased for the RMS ceramics to 686.55 ± 170 N by incubation in TRIS pH 7.4 and 651 ± 287 N at pH 5.0.

Study on Characteristics of Ultrasonic Velocity for the Concrete under Stress

2013 ◽  
Vol 438-439 ◽  
pp. 220-223 ◽  
Author(s):  
Ling Zhang ◽  
Chun Ling Yan
Keyword(s):  
Ultimate Strength ◽  
Ultrasonic Velocity ◽  
Ultrasound Examination ◽  
Testing Machine ◽  
Strength Level ◽  
Growth Trend ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Three Stages ◽  
The Relationship

Cube concrete (150×150×150mm) of five ages (7, 14, 21, 28 and 35 days) under different stress conducted the ultrasound examination by non-metallic detector and universal testing machine. The results show that the relationship curve of the stress and the ultrasonic velocity can be divided into three stages, the smooth straight stage, the linear deceleration stage and the attenuation destruction stage from the load beginning to the ultimate strength for the same age. There is a growing trend about the ultrasonic velocity with the increase of the age to concrete samples of C10 and C20 in the same loading; however, the overall growth trend of the velocity is not obvious to concrete samples of C30, C35, C40 and C45. It also shows that the relationship curve of strength level and the velocity can be divided into two distinct stages, the sharply increasing stage (C10-C30) and the fluctuating stage (C30-C45). Simultaneously, the paper further illustrates and explains the reasons to appear these stages and the phenomena.

Sign in / Sign up

Export Citation Format

Share Document