Papers by Shaheidula Batai
New Trends in Computational Vision and Bio-inspired Computing, 2020
Due to the adaptability to the hazardous works in dangerous, unreachable, and narrow environments... more Due to the adaptability to the hazardous works in dangerous, unreachable, and narrow environments, wall-climbing robots are much more helpful in petroleum industries, and they have played a crucial role in robotics. Lots of wall-climbing robots are designed for maintenance or detection [1]. Many types of pipes are being utilized for the construction of essential lifelines in our contemporary society. When the defect in the big pipes is caused by rust and natural calamity, it is difficult to locate the defect. Hence, scheduled inspection is essential. Besides, the high temperature and the big pipe is the key obstacles for human inspection. If a robot can climb up and complete the inspection of the outside surface of a pipe, a fast and accurate inspection result can be obtained at low cost and will be a wonderful labor-saving process. In-line crack-detection robots are being focused for the past years. The inspection mechanism can be divided into two sections based on their operation and installation such as out-pipe robot and in-pipe robot [2]. The out-pipe robots are complicated in design and development compare to the in-pipe robots. The out-pipe robot may face various obstacles whereas the in-pipe robot may have the fix type obstacle inside the pipe. Only the requirement for the in-pipe robot is that during the inspection period, there should be no chemical, liquid and pipe needs to be empty. As for the out-pipe robots, it needs to get over the obstacles such as flange and fixtures. Even so, it has the advantage of easy installation. The key point in designing a wall-climbing robot is to choose an appropriate adhesion mechanism. There are four types of suction-mechanism used in designing tube inspection robots such as suction cup mechanism, magnetic adhesion mechanism, adhesive materials,
3D printing technique has been developed rapidly and applied to manufacture components of diverse... more 3D printing technique has been developed rapidly and applied to manufacture components of diverse and complicated shapes and structures based on the computer-aided designs. To make 3D printing more promising and useful for more application purposes, mechanical properties of the materials used for printing should be studied and improved by developing new optimization methods. In this paper, a new optimization technique is developed for boosting mechanical properties of the materials by comparing tensile stress and extension of the specimens under different amount of loads in ANSYS. The specimens are made of two types of materials of various geometries and the same weight ratio according to the ISO mechanical test standards. Specimens are made of ABS and PLA. Case C shows the best tensile performances while Case B also shows good performs. Moreover, it is justified that the printing materials built of multi-materials have better properties, as well as the geometrical structures of the...
The maintenance and inspection of large vertical or horizontal tubes in an autonomous manner is s... more The maintenance and inspection of large vertical or horizontal tubes in an autonomous manner is still an unsolved issue. Existing techniques can traverse various types of surfaces but cannot measure inner cracks in a long tube. However, most of these techniques are restricted by accuracy level, type of construction material and cost efficiency. This research is mainly focused on the studies of various types of design investigations related to the climbing robots for the inspections, and design and development of a new robot to solve the existing problem in measuring various pipes diameter in petroleum industries. Based on the existing prototypes, a new type of adhesion, locomotion, sensor mechanisms and a modernized design was accomplished. The importance of this work is to prevent hazardous failures, which probably can be determined through the on-site analyses of the tubes. At this point, it is a laborious, time-consuming and dangerous process, which is performed by the human bein...
Recently, many researches in 3D printing has focused on designing and printing sandwich honeycomb... more Recently, many researches in 3D printing has focused on designing and printing sandwich honeycomb structures by using additive manufacturing. Their desirable mechanical properties, such as being of high strength/stiffness to weight ratio, appeal to use in the aerospace and automotive industries. Especially, cellular materials and structures are widely used in most of the energy-absorbing mechanisms due to the high strength as well as excellent energy-absorbing properties. In this research, deformation and mechanical strength of the sandwich structures with a honeycomb core, solid cores of the same weight, and the same thickness are compared, respectively. Where the honeycomb core is made of polylactic acid (PLA),and the face sheets are built of ABS. The thickness of the face sheets is kept the same for all the specimens. Therefore, only the differences of the core structures can influence the results of the experiments. According to the experimental results based on Von-Mises stress...
Rapid Prototyping Journal
Purpose This study highlights the demand for low-cost and high accuracy products through the desi... more Purpose This study highlights the demand for low-cost and high accuracy products through the design and development of new 3D printing technologies. Besides, significant progress has been made in this field. A comparative study helps to understand the latest development in materials and future prospect of this technology. Design/methodology/approach Nevertheless, a large amount of progress still remains to be made. While some of the works have focused on the performances of the materials, the rest have focused on the development of new methods and techniques in additive manufacturing. Findings This paper critically evaluates the current 3D printing technologies, including the development and optimizations made to the printing methods, as well as the printed objects. Meanwhile, previous developments in this area and contributions to the modern trend in manufacturing technology are summarized briefly. Originality/value The paper can be summarized in three sections. Firstly, the existing...
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Papers by Shaheidula Batai