Influence of the microwave-accelerated process on the drying kinetics, mechanical properties and surface appearance of rubberwood (Heavea brasiliensis)

2021 ◽  
Author(s):  
Somsak Vongpradubchai ◽  
Natt Makul ◽  
Phadungsak Rattanadecho
Keyword(s):  
Mechanical Properties ◽  
Drying Kinetics ◽  
Surface Appearance

scholarly journals Effect of Processing Steps on the Mechanical Properties and Surface Appearance of 6063 Aluminium Extruded Products

Materials ◽  
2014 ◽  
Vol 7 (6) ◽  
pp. 4224-4242 ◽  
Author(s):  
Juan Asensio-Lozano ◽  
Beatriz Suárez-Peña ◽  
George Vander Voort
Keyword(s):  
Mechanical Properties ◽  
Surface Appearance ◽  
Extruded Products ◽  
Processing Steps

scholarly journals LAMİNASYON TEKNİĞİ İLE ÜRETİLEN FİLMLERE UYGULANAN TEKRARLI YIKAMALARIN, PARLAKLIK, LAMİNASYON KUVVETİ VE OPTİK DANSİTE ÖZELLİKLERİ AÇISINDAN ETKİLERİNİN İNCELENMESİ

2020 ◽  
Vol 15 (4) ◽  
pp. 174-185
Author(s):  
Elif Yılmaz ◽  
Sevda Altaş ◽  
Nildeniz Adman
Keyword(s):  
Mechanical Properties ◽  
Optical Density ◽  
Raw Materials ◽  
Raw Material ◽  
Sample Type ◽  
Surface Appearance ◽  
Rectangular Form ◽  
Different Temperatures ◽  
Over Time ◽  
Textile Products

Metalized yarns are produced by cutting the films in different thicknesses, metalized with aluminum on one or both sides, in a rectangular form in the desired dimensions and wrapping them on bobbins under a certain tension. Textile products made of these yarns are exposed to repetitive washings like most textile products; metal surfaces of metalized yarns are abraded over time, their bright appearance decreases or disappears. It is undesirable because it affects the lifetime of the final product. In the study, laminated films were produced by the lamination technique using different raw materials to produce metalized yarns with the improved fastness and mechanical properties. Laminated films were subjected to repetitive washings at different temperatures, and the effects of washings on the surface appearance of the films, lamination strength, and optical density properties were examined. As a result of the study, it was determined that repetitive washings reduce the lamination strength, the gloss property is affected by raw material type, the sample type, washing temperature, and the number of washing cycles affect the optical density.

Vacuum contact drying kinetics of Jack pine wood and its influence on mechanical properties: industrial applications

2014 ◽  
Vol 51 (7) ◽  
pp. 1029-1039 ◽  
Author(s):  
Sahbi Ouertani ◽  
Ahmed Koubaa ◽  
Soufien Azzouz ◽  
Lamine Hassini ◽  
Kamel Ben Dhib ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Jack Pine ◽  
Industrial Applications ◽  
Drying Kinetics ◽  
Pine Wood ◽  
Contact Drying ◽  
Kinetics Of

Particle Distribution and Mechanical Properties of Silica-Filled PMMA Micro-Injection Moldings

2008 ◽  
Author(s):  
Yew Wei Leong ◽  
Supaporn Thumsorn ◽  
Asami Nakai ◽  
Hiroyuki Hamada ◽  
Kohji Yoshinaga ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Fracture Surface ◽  
Methyl Methacrylate ◽  
Particle Distribution ◽  
Homogeneous Distribution ◽  
Particle Sizes ◽  
Surface Appearance ◽  
Fracture Properties ◽  
Filler Distribution

Micro-injection moldings of poly(methyl methacrylate) filled with silica of various particle sizes ranging from 5 to 50 μm were fabricated. The distribution of the silica particles throughout the moldings was found to be significantly different, i.e. a more homogeneous distribution of fillers was evident as particle size decreases. Fracture properties, fracture surface appearance and transparency were significantly affected by the state of filler distribution.

Drying kinetics of nopal (Opuntia ficus-indica) using three different methods and their effect on their mechanical properties

LWT ◽  
2008 ◽  
Vol 41 (7) ◽  
pp. 1183-1188 ◽  
Author(s):  
L. Medina-Torres ◽  
J.A. Gallegos-Infante ◽  
R.F. Gonzalez-Laredo ◽  
N.E. Rocha-Guzman
Keyword(s):  
Mechanical Properties ◽  
Drying Kinetics ◽  
Opuntia Ficus Indica ◽  
Kinetics Of

scholarly journals Cuticle and skin cell walls have common and unique roles in grape berry splitting

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ben-Min Chang ◽  
Markus Keller
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Cell Walls ◽  
Temporal Dynamics ◽  
Grape Berry ◽  
Cuticular Waxes ◽  
Surface Appearance ◽  
Grape Berries ◽  
Skin Cell ◽  
Cuticle Thickness

AbstractThe skin protects a fruit from environmental stresses and supports the fruit’s structure. Failure of the skin leads to fruit splitting and may compromise commercial production for fruit growers. The mechanical properties of the cuticle and skin cell walls might influence the splitting susceptibility of fleshy fruits. Thin shell theory and fracture mechanics were utilized in this study to target the potential factors contributing to splitting susceptibility. The study analyzed the structure of the cuticle and epidermis in ripening grape berries and examined the temporal dynamics of berry splitting. Cuticular waxes were partially removed, and skin cell walls were manipulated using wall stiffening and loosening solutions that altered reactions involving hydrogen peroxide. A more than twofold difference in cuticle thickness among grape cultivars did not account for their differences in splitting resistance. However, while removing predominantly epicuticular wax did not alter the berries’ splitting resistance, their surface appearance and increasing yield strength following partial wax removal support the notion that cuticular waxes contribute to berry mechanical properties. Immersing berries in H2O2-based cell wall loosening solutions increased the splitting probability and accelerated berry splitting, whereas cell wall stiffening solutions decreased the splitting probability and delayed berry splitting. These results showed that both cuticle and skin cell walls contribute to the mechanical properties of grape berries and to their splitting resistance. The results also suggest that the two current explanations for fruit splitting, the critical turgor model and the zipper model, should be viewed as complementary rather than incompatible.

Evaluation of the Physical and Mechanical Properties of Ceramic Tiles Processed Using Steel Slag

2013 ◽  
Vol 856 ◽  
pp. 257-261
Author(s):  
Benneth C. Chukwudi ◽  
Boniface A. Okorie
Keyword(s):  
Mechanical Properties ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Linear Shrinkage ◽  
Modulus Of Rupture ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Kaolinite Clay ◽  
Surface Appearance

This present study has evaluated the physical and mechanical properties of ceramic tiles processed from steel slag. The chemical compositions of both samples were conducted using atomic absorption spectrophotometer (AAS). Steel slag in the range of 0-100wt% was added to kaolinite clay. The blended samples were hydraulic pressed into rectangular moulds, oven dried and sintered within the temperature range of 1100°C - 1200°C. Surface appearance and colouration of sintered products were observed. Linear shrinkage, apparent porosity, water absorption, bulk density, apparent specific gravity and modulus of rupture of sintered samples were examined. Phases present were identified using X-ray diffraction (XRD), while microstructural examination was conducted using scanning electron microscopy (SEM). Phases like quartz, wollastonite, enstatite, were identified. SEM showed considerable degree of vetrification at both temperatures. Results obtained showed that samples containing 25-75wt% steel slag have very good usable ceramic tile properties.

scholarly journals Effect of Tools Geometry and Dwell Time on Mechanical Properties and Macrograph of Two-Stage Refilled Friction Stir Spot Micro Weld

2019 ◽  
Vol 269 ◽  
pp. 02002
Author(s):  
Ario Sunar Baskoro ◽  
Mohammad Azwar Amat ◽  
Muhammad Andre Widiyanto
Keyword(s):  
Mechanical Properties ◽  
Dwell Time ◽  
Shear Load ◽  
Micro Hardness ◽  
Lap Joint ◽  
Tensile Shear ◽  
Surface Appearance ◽  
Friction Stir ◽  
Average Value ◽  
Hardness Variation

In this present study, the two independent tools were used in the RFSSW process to joint similar material of AA1100 with a thickness of 0.42 mm using lap joint configuration. Effect of tools geometry and dwell time on mechanical properties, and macrograph was investigated. The joints were successfully obtained with better surface appearance. The micro-hardness variation at 4 group location shows higher than the base metal, while the maximum micro-hardness was obtained at parameter TC-8 at the center of the weld. Macrograph analysis showed the important factor that brings the plug fracture in all combination of parameters. It was the upward bending hook that leads to the crack propagate along the stirred zone to the top sheet, resulted in tear-off the top sheet from the bounded region. Increasing dwell time and tools size will increase the maximum tensile shear load significantly. The best average value of maximum tensile shear load that has been achieved was 561±24 N using the parameter tool C with 8 s dwell time (TC-8).

Sign in / Sign up

Export Citation Format

Share Document