Iris Publishers Journal Of Engineering Sciences

  IrisPublishers A357 Aluminum Alloy Cutting Performance Finite Element Simulation Authored     by Cheng-Ming Huang Abstract Aiming at the problem that deformation caused by cutting force in the cutting process of A357 aluminum alloy, a two-dimension cutting simulation was established based on ABAQUS. The curves of chip, cutting force and stress under different cutting conditions were obtained by using Johnson-Cook constitutive equation. The finite element simulation was applied to further analyze the effects of different cutting conditions on chip, cutting force and stress. The simulation results show that the cutting force increases with the increase of cutting speed and increases with cutting depth in the experimental parameters range, it also leads to poor cutting quality. As the cutting length changes, the fluctuation of cutting force also increases and affects the overall quality of the workpiece. Keywords:  Finite element simulation; Cutting state; Cutting...

  Iris Publishers Studying the Nuclear Structure using the Naturally Occurring Radioactive Sources Authored     by MMR Chishti Abstract Scientists believe that that natural radioactive sources contains the wealth of information regarding exploring the nuclear structure as well as the search for the events during the formation of the universe and properties and existence of matter and anti-matter. Thorium and Uranium are radioactive sources and exist since the formation of earth after the Big Bang. These nuclei are found abundantly on the earth and are being been used for number different purposes including power generation, isotopes production and studying the nuclear structure at the lowest level. This short review explains that how these naturally occurring radioactive sources are being studied in the laboratories to explore nuclear structure in actinides region of nuclei and what is the scope of any potential research that can be performed. The continuously emitted a...

Iris Publishers The Characterization of Energy Absorption and Failure Response of Square Paper Tube by Quasi Static Axial Compression Test Authored   by Jie-Shing Lo Abstract The characterization of mechanical and energy absorption properties of the square paper tube is performed by using the quasi static axial compression test. In the proposed technique, four square paper tubes with various widths of 60 mm, 65 mm, 75 mm, 80 mm, and same nominal thickness 2.75 mm, are tested. The load-displacement curve is used for analyzing the buckling failure modes. The results show that the buckling failure initiates at the top end and mid-length of the tube varies with the width of the square tubes. The peak compressive load/energy absorption of the specimens with different width are studied. The results show that the peak compressive load decreases while the energy absorption increases with the increase of the compression stroke. Furthermore, the results also show that the crush force ef...

  Iris Publishers The Future of Higher Education Online Learning Authored   by Qi Zhu Abstract Most universities and higher education organizations have offered both face-to-face sessions and online sessions to the students for most of courses. However, COVID-19 has forced nearly all students including those who initially selected face-to-face sessions to online instruction during pandemic time. In this paper, we predict that the majority university learning will move from face-to-face to online learning. Introduction In recent years, fully online or hybrid/blended online instruction courses are increasing at many higher education institutions in the United States and worldwide [1]. Parker, et al. [2] showed that 89 percent of four-year higher education institutions offered courses taught fully online, or hybrid/blend online. Of all students enrolled in higher education in 2017, 33.5% enrolled in some form of distance education/online learning courses [3]. However, the ma...