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Online since: May 2021
Authors: Ruslan R. Safin, R.R. Kozlov, Dmitry B. Prosvirnikov
We established the influence of impregnation modes (temperature, catalyst concentration), continuous steam explosive treatment with afterwash (temperature, pressure, intensity of mechanical action), as well as the properties of activated lignocellulose fibers (composition and morphological structure) on the operational properties of WCM.
All of the above proves the negative effect of washing the activated fibers on the final properties of WCM based on them and gives grounds to assert that the presence (including the quantity and qualitative composition) of steam explosive treatment products in activated fibers, as well as the pressing temperature, are key factors in the formation of the physical properties of WCM.
In this case, more soluble fractions participate in the formation of a binder during hot pressing, and have a positive effect on the strength properties, and the condensed fractions are destructed during hot pressing, polymerizing even more, negatively affecting the final strength.
Bako, Analysis of mechanical strength of woven strip composite at petung bamboo (Dendrocalamus asper) epoxy resin tape: tensile strength properties of bamboo strips, IOP Conference Series: Earth and Environmental Science. 343:1 (2019)
Bazan, Bio-based polyethylene composites with natural fiber: mechanical, thermal, and ageing properties, Materials. (2020) 13:11
Online since: May 2011
Authors: Rui Bo Ren, Li Zhi Wang, Peng Wang, Li Tao Geng
However, as high modulus asphalt mixture is still not popular at present, very little research on mechanical properties of high modulus asphalt mixture were reported.
And the mechanical properties of these mixtures are evaluated with Simple Performance Testing system (SPT) under different temperature, loading frequency and confining pressure.
This relates to internal factors of asphalt binder and aggregate gradation, and external factors of confining pressure and loading frequency.
And the mechanical properties such as dynamic modulus and phase angle of these two mixtures are tested with SPT under different combination of temperatures, loading frequencies and confining pressures.
Testing results also show significant influence of temperature, loading frequency and confining pressure on mechanical properties of high modulus asphalt mixture and the complex changing rules of dynamic modulus and phase angle.
Online since: February 2022
Authors: Md Mazedur Rahman, Jakiya Sultana, Md Shazzad Hossain, Muhammad Adeel
Stitch length or loop length is one of the important factors, which is associated with knit fabric [7-8] dimension and other properties including GSM (gram per square meter).
Tao et al. [16] studied that yarn twist factor and fabric tightness factor have a correlation with fabric spirality.
However, the fabric weight is not affected by spirality in the dyed fabric.
In addition, combed yarn was selected due to their good mechanical properties compared to carded yarn.
Hasan, , “Effect of Stitch Length and Fabric Constructions on Dimensional and Mechanical Properties of Knitted Fabrics”, World Applied Sciences Journal, Vol. 32, No. 9, (2014), 1991-1995.
Online since: February 2012
Authors: Jian Zhong Wang, Shi Long Zhang, Jian Gao
The result shows that: both kinds of springs can meet the design requirements in maximum work force and fatigue, but the new spring are significantly lighter compared with the traditional invariable diameter, and the mechanical properties of material of the new spring are more fully played.
For the springs of various applications, their demesions, material properties and manufacturing process are all of great difference from each other.
Second, the maximum stress of variable diameter spring is larger than the invariable one, but the mechanical properties of spring wire is more fully played on the former one, and the overall force status of spring has also been improved.
This is one of the main forms of spring failure[8][9], so it is essential to test the new spring’s fatigue properties.
The stress of the variable diameter spring is distributed more uniformly and the mechanical properties of spring wire material are more fully played.
Online since: August 2011
Authors: Jun Wang, Shu Guang Zhang, Chuan Zhen Huang, Cui Lian Che, Hong Tao Zhu
So, characteristics of the metal kerf are affected by conditions of erosion.
The mechanical properties and chemical composition are listed in Table 1 and Table 2 respectively.
Mechanical Properties of Q235 Steel Material Tensile Strength (MPa) Yield Strength (MPa) Elongation Rate (%) Q235 375-460 ≥235 ≥26 Table 2.
It is found that cutting speed and abrasive grit are the significant factors under more than 95% confidence level, abrasive flow rate is the significant factor under more than 90% confidence level and waterjet pressure and standoff are not significant factors relatively.
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science.
Online since: August 2014
Authors: Alena Vagaská, Miroslav Gombár, Ján Kmec, Peter Michal
When assessing the role of machining in engineering production, its significant properties are versatility and flexibility.
The second one is physical and chemical properties of a surface layer of machine parts.
Independent variables affecting the process are called factors and are denoted by .
From a user’s point of view, for the given case, cutting conditions which affect the studied characteristics of the surface morphology were considered to be the factors (process parameters).
Monková, Side milling factors analysis affecting the surface irregularities of high-grade steel E295, Tehnicki Vjesnik 15/2 (2008) 19-23
Online since: May 2014
Authors: Ji Jun Xiao, Jing Du, Meng Meng Zhou, Ling Ling Ma, Fei Cao
The properties of the polyurethane were characterized by Fourier Transform Infrared Spectroscopy(FTIR), thermal gravimetric analysis(TGA), dynamic mechanical thermal analysis(DMA) and electronic universal testing machine.
The aim of this work is synthesize the one-component moisture-cure polyurethane adhesive and discussed the effect of NCO/OH ratio on the mechanical properties.
Fig.3 TGA of moisture-cure polyurethane Fig.4 DMA of moisture-cure polyurethane Effect of NCO/OH ratio on mechanical properties of moisture-cure polyurethane film.
The factors of NCO/OH ratio has seriously influenced the ability of adhesives.
Table 1 NCO/OH ratio effect on the mechanical properties of film NCO/OH Tensile strength/MPa elongation at break/MPa hardness/Shore A 2.98 65.28 67.28 95 3.29 77.05 67.82 99 3.71 91.07 105.9 100 4.03 92.92 99.70 97.5 4.43 78.05 86.04 96 The influence of NCO/OH on mechanical properties of bonded wood by moisture-cure polyurethane.
Online since: December 2024
Authors: Abdullah Abdullah, Yulia Hayati, Wahyuni Wahyuni, Sri Mulyati
The Influence of Service Live factors on Concrete Mixed with Sea Sand and Seawater with the Addition of Zeolite on the Mechanical Properties of Concrete Wahyuni1,2,a, Abdullah3,b*, Yulia Hayati3,c dan Sri Mulyati4,d 1Doctoral Program in Engineering, Syiah Kuala University, Darussalam, Banda Aceh, 23111, Indonesia. 2Department of Civil Engineering, Faculty of Engineering, Muhammadiyah Aceh University, 23245 Banda Aceh, Indonesia 3Department of Civil Engineering, Faculty of Engineering, Syiah Kuala University, Darussalam, Banda Aceh, 23111, Indonesia 4Department of Chemical Engineering, Faculty of Engineering, Syiah Kuala University, Darussalam, Banda Aceh, 23111, Indonesia awahyuni@unmuha.ac.id, babdullahmahmud@usk.ac.id, cyuliahayati@usk.ac.id, dsri.mulyati@usk.ac.id Keywords: zeolite, sea-sand seawater, compressive strenght Abstract.
The use of concrete with sea sand and seawater has been the focus of previous research to enhance the properties and strength of the concrete.
The main objective of this research is to evaluate the mechanical properties of concrete using sea sand and seawater at the age of 14 and 56 days, comparing it with concrete using river sand and river water.
Girskas, “Research into the properties of concrete modified with natural zeolite addition,” Constr.
Obuseng, “A Review of the Chemistry, Structure, Properties and Applications of Zeolites,” Am.
Online since: February 2019
Authors: Alexander V. Klyuev, T.A. Khezhev, Yu.V. Pukharenko, Sergei V. Klyuev
The mechanical behavior of the fibre reinforced material depends on the structure of the composite, which has both the properties of concrete and the properties of the fibre used in the cement mixture.
The influence of such short, inclined fibers on the mechanical properties of reinforced concrete, as a rule, is smaller than the long fibers located parallel to the load.
However, the efficiency of the fibers in the cement matrix that increase the mechanical properties of concrete can be estimated in two ways: · Increase the strength of concrete
All three of these factors were not independent, as the effect of fiber length and orientation has a significant impact on the link between fiber and cement stone.
Study of physical-mechanical and rheological properties of high-strength steel fibre concrete, Architecture and construction. 1 (2013) 106–113
Online since: March 2021
Authors: Rhoda B. Leron, Xech Rafael Aldrei U. Dela Paz
The hydrophilic character of the PES membrane significantly increased and the mechanical properties were greatly improved.
As shown in Fig. 2, the pores of the membranes were not significantly affected after surface modification (after treating the data using ANOVA: single factor test).
The mechanical properties of the membrane samples were analysed using a Universal Testing Machine (UTM).
The improved mechanical property could result in better durability of the membrane as filter medium.
Conclusions Polyethersulfone was successfully modified via coating with PDA and deposition of antibacterial Cu2+ metal on its surface forming a membrane composite (PES/PDA/Cu2+) with enhanced hydrophilicity and good mechanical properties.
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