Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : high temperature


Electromechanical Design and Manufacturing of Dynamic Buckling Test Rig Under Various Temperature Conditions

Shaymaa M. Mshattat; Hussain J.M Al-Alkawi; Ahmed H. Reja

Engineering and Technology Journal, 2022, Volume 40, Issue 1, Pages 233-240
DOI: 10.30684/etj.v40i1.2276

A column is a structural member that bears an axial compressive load and is more likely to fail due to buckling compared to material strength. Some of these columns work at a high temperature and this temperature affects the behavior of buckling. Therefore, the designer must take this factor (temperature) into consideration. For the purpose of studying the effect of different temperatures on the phenomenon of buckling under compression dynamic loads to evaluate the state of failure for different types of columns, the thermal buckling test device has been designed and manufactured. Using this rig, practical tests can be conducted on solid and hollow columns of different metals and diameters, and thus the safe critical load for the column can be predicted. This device was successful in evaluating the life of the columns made of aluminum alloy (6061-T6) when the buckling interacts with heat. The current study found that rising the temperature increases the failure under the buckling phenomenon.

Design, Fabrication, and Testing of an Electromechanical High-Temperature Tensile Test Machine

Taif Y. Ghadhban; Hussain J.M Al-ALkawi; Ahmed H. Reja

Engineering and Technology Journal, 2021, Volume 39, Issue 4A, Pages 614-624
DOI: 10.30684/etj.v39i4A.1911

The following paper presents a developed design and manufacturing of a servo-driven Electromechanical high-temperature tensile machine with an integrated environmental chamber. The maximum load capacity is set to be 20 kn with the possibility of future upgrades. The machine is automated by a computerized system that controls the entire operation of the designed machine. It is designed to be capable for testing a variety of materials at various temperatures ranging from room temperature up to 500℃. The machine was fully controlled using automated software to control the entire operation and to provide users with a certified test report. The main component is a high-quality aluminum frame that hosts the entire setup, like a furnace, and a universal type gripping mechanism. The structure is monitored by precise measurement instrumentation and a dependable data acquisition system. The machine was validated by testing AA6063-T6 to evaluate the sophistication of the machine's functionality. The results then compared to an international standard, provided close results with a low percentage error of about 4.5% compared to international standard readings.

Determination Some Creep Factors For Lead Under Tension

Tariq Mohammed Ali Al Nuaimi

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 106-118

There are a lot of engineering structures working at elevated temperatures for long periods, as in chemical plants, generation, transfer and energy application or devices uses of energy, such as turbines and reactors. When those parts work at high temperature, it was found that their materials which exposed to loads will undergo to plastic deformation and deforms slowly like a crawl turtle, for this reason they named this slow deformation as a Creep.
Care has been given in this research has to study the issue of creep under the influence of various loads under certain temperature, and the implementation of a creep test machine by a tension samples made from lead .
This research includes a study of creep parameters under the influence of temperatures. Creep properties were investigated under constant stress and fixed temperature in terms of the relation between a strain for period of times by the specimen used in this study which was lead and the applied load was tension.