The prostheses sockets use normally composite materials which means that their applications may be related with the human body. Therefore, it was very necessary to improve the mechanical properties of these materials. The prosthetic sockets are subjected to varying stresses in gait cycle scenario which may cause a fatigue damage. Therefore, it is necessary or this work to modify the fatigue behavior of the materials used for manufacturing the prostheses sockets. In this work, different Nano particle materials are used to modify the mechanical properties of the composite materials, and increase the fatigue strength. By using an experimental technique, the effect of using different volume fractions for various types for Nano particle materials on the fatigue behavior for composite materials, and preparing the fatigue samples and tested using the fatigue apparatus. The Nano particles used were (Nano SiO2 and Nano Al2O3) materials with volume fraction as (0% to 2%), for each type of Nano material used. The artificial neural network technique was adopted to have a verification for the experimental results and calculating the fatigue life and strength for composite materials, with the addition of nanoparticles and then, a comparison of the results was achieved. The comparison of the results indicate a maximum error between results calculated by two technique did not exceeded about (1%). Then, the results calculated showed that the mechanical properties and fatigue life and strength increase with reinforcement with Nano particle. Also, the results showed that the modified for fatigue limits with materials by (Nano SiO2) Nano particle was more than the modified for fatigue limits for materials reinforcement with other materials. Finally, it can be concluded that the modified for fatigue strength, by reinforcement with (Nano SiO2), leads to 60% more than fatigue limit without Nano additive.

In this study, aluminum alloyAA6061-T6 was joined by a hot press process with three types of material; polyamide PA 6.6 (nylon), 1% carbon nanotube/PA6.6 and 30% carbon fiber/PA6.6 composites. Three parameters were considered in the hot pressing; temperature (180, 200 and 220°C), pressure (2, 3, 4, 5 and 6 bar) and time of pressing (1, 2, 3, 4 and 5 minutes for 200ºC, and 0.25, 0.5, 0.75, 1 and 1.25 minutes for220ºC). Applied pressure has great effect on shear strength of the joint, corresponding to bonding time and temperature. Maximum shear strength was 8.89MPa obtained for PA6.6 at bonding conditions of 4 bar, 220ºC and 0.75 minute. For 30% carbon fiber/PA6,6 shear recorded was 8MPa at 4 bar, 220°C and 1 minute, while 1% carbon nanotube/PA6.6 was registered at 8MPa at 4 bar, 220ºC and 0.75 minute. Mechanical interlocking of polyimide in anodizing surface is 8μm approximately. The melting point and glass transmission temperature of polyimide and composites are decreased after hot pressing.

Crude oil is one of the most important sources of energy in the world. To extract its multiple components, we need oil refineries. Refineries consist of multiple parts, including heat exchangers, furnaces, and others. It is known that one of the initial operations in the refineries is the process of gradually raising the temperature of crude oil to 370 degrees centigrade or higher. Hence, in this investigation the focus is on the furnaces and the corrosion in their tubes. The investigation was accomplished by reading the thickness of the tubes for the period from 2008 to 2020 with a test in every two year, had passed from their introduction into the work. Where the thickness of more than one point was measured on each tube in the same row and the corrosion rate was extracted for three furnaces, starting from the area of ​​heat transfer by radiation to the heat transfer area of ​​the convection in three different operating units. It was found that the highest percentage corrosion value between the standard tube thickness and the thickness of conduction position was 37% with the conduction zone, and 31% with radiation zone. There, the tubes specification was tested. Five percent Cr-0.5 Moly and the temperature of radiation zone was 578 °C to 613 °C and the stack temperature was 410 °C to 450 °C. So, the results show that the maximum erosion occur at the convection zone.

Journal bearings are widely used in industry due to their favourable characteristics such as relatively low cost of manufacturing and maintenance, high load carrying capacity, and useful dynamic characteristics for rotor systems. Journal bearing misalignment, however, may have negative consequences for the general performance of this type of bearing. Misalignment commonly occurs due to errors in manufacturing tolerances, installation errors, wear, shaft deflection, and asymmetrical loading of systems. This paper presents a solution for hydrodynamic problems in journal bearings of finite length based on a 3D misalignment model and linear modification of the bearing profile to reduce the effect of misalignment on the characteristics of the journal bearing. The results showed that linear modification of misaligned journal bearings reduces the maximum pressure and improves the level of film thickness; additionally, the dynamic characteristics of the journal bearing are also improved by such linear profile modification.

IHICPAS Conference Proceeding volume contain the novel contributions that were reviewed and presented through the Ibn Al-Haitham International Conference for Pure and Applied Sciences (IHICPAS) will be held in College of Education for Pure Science (Ibn al-Haitham), University of Baghdad on 20 and 21 December, 2020., where the conference covers 6 tracks which includes (Trackl Chemistry, Track 2: Mathematics, Track3: Computer Science, Track 4: Biology Sciences, Track 5: Physics, and Track 6: Remote Sensing and GIS). IHICPAS aims to gathering together all the new trends, projects, technologies, and recent research works in many fields in pure and Applied Sciences. The received papers which passed the double-blind reviews which successfully passed the reviewers comments and editorial board decisions comes from various authors around the world, where the authors are either working in academics centers, universities, research institutes, corporations, industries, and other agencies or postgraduate students where the presented works refers to their novelty in their research works. IHICPAS Conference got very significant interesting from authors that comes from several countries like: UK, India, French, Morocco, Turkey, Nepal, Philippines, Indonesia, Australia, Egypt, Lebanon, Algeria, Iran, Pakistan, Malaysia, and Many other Countries where the authors are successfully presented their works and attend the sessions who managed by our scientific and organizing committee Members, and answered all the questions and dotes that directed by session chairs and attendances. We successfully held this conference within 2 days (20 and 21 December 2020), where in the first day we successfully listen to the keynote speakers’ presentations then the session started from 10:00 AM based on Iraq Standard Time till 10:00PM. We would like to express our thanks and appreciation to all our session chairs for their hard work and attend our (12) sessions through two days and more than 10 hours per day to deliver the presented works in successful manner. Venue of the Conference, The Reason(s) why IHICPAS Conference Held virtually:, Technology, Technical Difficulties and Drawbacks of Conference Virtually., The Main Technical Difficulties of Virtual Meetings can be summarizing as follow:, Conference Chairs, Conference Secretariat Chairs, International Program Chairs, Scientific Committee, Organizing Committee, Invited Speakers, Organizing Institutions, Special Thanks to Conference Partners:, Conference Flyers and Posters:, are available in the pdf