Mechanical Engineering
Mechanical Design of Robot
Origami Robots
Fracture Mechanics
CNC Machine and 3D Printers
Mechatronics and Robotic Systems
Dynamic Analysis of Structures
Artificial Intellects and Automation Systems
3
Scopus Publications
Scopus Publications
Parabolic Air Collectors with an Evacuated Tube Containing Copper Tube and Spiral Strip, and a New Cavity Receiver: Experimental Performance Analysis Ayad K. Khlief, Wisam Abed Kattea Al-Maliki, Hasanain A. Abdul Wahhab, Falah Alobaid, Bernd Epple, Akeel A. Abtan Sustainability Switzerland, 2023 Sunray thermal energy is one of the most promising and quickly growing techniques globally. In parabolic trough air collectors (PTAC), receiver design and safety are of paramount importance because of their impact on the overall effectiveness of power plants. However, experimental studies of alternative receivers to improve heat transfer are still to be performed. In this study, a PTAC system was tested experimentally with an evacuated tube: open on one end, containing a copper tube and a spiral strip (case 1), and with a new cavity receiver consisting of several arranged tetragonal pyramidal elements (case 2). Afterward, the results were compared and showed a slightly superior exit air temperature and thermal efficiency performance for case 1. The overall results demonstrate a remarkable convergence of case 2 from case 1 in terms of temperature increase across PTAC, in which the maximum exit air temperature for case 1 is 58.2 °C, a 3.4% increase over case 2 at 0.0105 kg/s mass flow rate. Lastly, the results validate the potential and clarify the specific conclusions of these methods’ application in improving heat exchange in a PTAC.
A measurement device for bending shape memory wire (BSW) actuators Akeel A. Abtan, Robert C. Richardson Aip Conference Proceedings, 2022 The shape memory wires are used as actuators for many applications. The purpose of this paper is to build a measurement device that could calculate the properties of bending shape memory wire actuators to find their activation temperature and generated force. The measurement device is build using the thermosensor and load cell, and it is controlled using LabVIEW. The device can test the bending shape-memory wires for (30,60, and 90 Degree). It is found that the diameter of the wire is the significant parameter that affects the generated force, while the folding angle did not affect the results. The activation temperatures for all wires are determined to be between (50-79 OC). The bending shape memory wire is the potential solution for self-folding robot applications.
Analyzing the 3D printed material Tango plus FLX930 for using in self-folding structure Akeel A. Abtan, Robert C. Richardson, Briony Thomas 2016 International Conference for Students on Applied Engineering Icsae 2016, 2017 Self-folding is the ability of the structure to fold and/or unfold without human intervention or any application of external manipulation. It is known that the structure of folding object consists of two essential parts. These parts are the faces and the creases. In this paper, it is assumed that the faces could be built by using solid materials, and the crease lines can be built using soft material which provides a high bent ability. Furthermore, these two materials should be combined built without using any connections between them. Fortunately, the 3D printer provides this capability. It can print two types of different materials at the same time for the same structure. Therefore, a 3D printer is chosen to fabricate a folding structure using two types of material. These types are the Vero for solid faces and Tango plus FLX930 for the soft creases lines. The soft material at hinge part (creases lines) subjected to the load directly when the structure folds. It should have a clear view of the mechanical properties of this material. Therefore, several mechanical tests for Tango FLX930 material are operated to calculate its mechanical properties and find the force that required to fold it.
