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Testimonials: See what our authors say about Materials. Sections: published in 23 topical sections. Impact Factor: 3. Latest Need jo material. Open Access Article. Chieh-Ting Yang. Yaw-Shyan Tsay. Abstract Cross-laminated Timber CLT has become an emerging board material of wood construction that is strong enough to sustain a high-rise building. However, many wooden congregate housing units overseas that utilize CLT have poor sound environments because the low mass of such wood influences [ Cross-laminated Timber CLT has become an emerging board material of wood construction that is strong enough to sustain a high-rise building.
However, many wooden congregate housing units overseas that utilize CLT have poor sound environments because the low mass of such wood influences sound insulation performance. In this research, we explored the effect of different CLT walls on sound insulation performance and integrated applicable sound insulation simulation tools to simplify the process of deing a CLT wall structure. This research aimed at a double wall and CLT combined with a gypsum board as the research object.
The sound insulation performance test was carried out in a laboratory, while the sound insulation performance of the structure was predicted through simulation tools and prediction models and then compared with the measured values to verify the applicability of the simulation tool. The numerical simulation had better prediction performance than INSUL at the double wall, while the double wall with cavity structure was close to the measured result via mass law calculation.
Full article. Shenrou Gao. Fengjuan Wang. Qingming Hu. Cheng Xu. Fengxia Xu. By changing the parameters of the tool angle, milling depth, and milling speed, the influence of these parameters on the cutting force, cutting temperature, cutting stress, and cutting chips was studied. Optimization of the parameters was based on the above change rules to obtain the best processing combination of parameters. Then, the causes of surface machining defects, such as deep pits, shallow pits, and bulges, were simulated and discussed.
The optimal combination of milling parameters provides a theoretical basis for subsequent cutting. Lin He. Hongwan Jiang. Sen Yuan. Zhongwei Ren. Abstract This study deed a new microgroove cutting tool to machine Inconel and focused on the effect of microgroove structure on the cutting performance and chip morphology during the turning.
A comparative analysis of the cutting force, cutting temperature, tool life, tool wear, [ This study deed a new microgroove cutting tool to machine Inconel and focused on the effect of microgroove structure on the cutting performance and chip morphology during the turning. A comparative analysis of the cutting force, cutting temperature, tool life, tool wear, and chip morphology of the microgroove cutting tool and the original cutting tool was conducted. The microgroove cutting tool exhibited a ificant improvement compared with the original cutting tool, which extended the tool life by up to Further, the microgroove cutting tool distorted the curl radius of the chips extensively.
The experimental showed that the microgroove structure can not only improve the tool life, but also improve the chip breaking effect. Ekaterina A. Stanislav L. Ilya N. Abstract This article deals with the theoretical issues of the formation of a melt pool during the process of direct laser deposition.
The shape and size of the pool depends on many parameters, such as the speed and power of the process, the optical [ This article deals with the theoretical issues of the formation of a melt pool during the process of direct laser deposition. The shape and size of the pool depends on many parameters, such as the speed and power of the process, the optical and physical properties of the material, and the powder consumption. On the other hand, the influence of the physical processes occurring in the material on one another is ificant: for instance, the heating of the powder and the substrate by laser radiation, or the formation of the free surface of the melt, taking into the Marangoni effect.
This paper proposes a model for determining the size of the melt bath, developed in a one-dimensional approximation of the boundary layer flow. The dimensions and profile of the surface and bottom of the melt pool are obtained by solving the problem of convective heat transfer. The influence of the residual temperature from the track, as well as the heat from the heated powder of the gas—powder jet, taking into its spatial distribution, is considered.
The simulation of the size and shape of the melt pool, as well as its free surface profile for different alloys, is performed with L steel, Inconel nickel alloy, and VT6 titanium alloy Full article. Marcin Kozakiewicz. Kamil Jurczyszyn. Abstract Venous lake VL is a common lesion resulting from the enlargement of thin-walled veins surrounded by a thick wall of fibrous tissue. Photocoagulation is becoming one of the basic methods for treating small vascular lesions. The aim of this study was an application [ Venous lake VL is a common lesion resulting from the enlargement of thin-walled veins surrounded by a thick wall Need jo material fibrous tissue.
Twenty-three VLs were included in the study. The total dose of energy was in a range from 80 J to J. Need jo material used the difference of intensity algorithm for FDA and microcontrast and a co-occurrence matrix for TA. No differences in FD were observed between the lesions after three months and the healthy mucosa.
The fractal dimension and microcontrast of a vascular lesion are mutually coupled. FDA and TA is a useful and objective method of assessing treatment effects for venous lakes. The non-contact mode of the nm diode laser is an effective and safe method for treating a VL. The slope factor of this straight line is a value fractal dimension counted by the intensity difference algorithm. These are black and white photographs. Below the Need jo material row of images are presented maps of intensity of the texture feature under study.
In white in these maps are marked areas of high microcontrast detection. Conversely, black areas indicate low intensity of the contrast feature. Healing is characterized by the appearance of scattered areas of high microcontrast.
The lesion had ificantly lower contrast than normal mucosa similar site condition 7 days after treatment.
After 3 months, the treated site achieved texture features that were the same as the intact mucosa. The horizontal lines in the boxes indicate the median. Grey lines indicate confidence limits. Zhiyang Lin. Can Tang. Wenfeng Hao. Abstract The amounts of the components in a microcapsule self-healing system ificantly impact the basic performance and self-healing performance of concrete. In this paper, an orthogonal experimental de is used to investigate the healing performance of microcapsule self-healing concrete under different pre-damage lo. The [ The amounts of the components in a microcapsule self-healing system ificantly impact the basic performance and self-healing performance of concrete.
The strength recovery performance and sound speed recovery performance under extensive damage are analyzed. The optimum factor combination of the microcapsule self-healing concrete Need jo material obtained. Scanning electron microscopy SEM and energy dispersive spectroscopy EDS are carried out on the concrete samples before and after healing to determine the healing mechanism.
The show that the healing effect of self-healing concrete decreases with an increase in the pre-damage load, and the sound speed recovery rate increases with an increase in the damage degree.Need jo material
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