Researcher:
Hussain, Abbas

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Abbas

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Hussain

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Hussain, Abbas

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2019 - 20203

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    Distortion in milling of structural parts
    (Elsevier, 2019) N/A; Department of Mechanical Engineering; Hussain, Abbas; Lazoğlu, İsmail; Researcher; Faculty Member; Department of Mechanical Engineering; Manufacturing and Automation Research Center (MARC); N/A; College of Engineering; N/A; 179391
    Cutting forces and thermal loads in milling may cause distortion in machined parts. Especially in the aerospace industry, distortion of thin wall structural parts in milling is one of the major problems. This problem can lead to increasing production costs or even rejection of manufactured parts. This article presents a new finite element modeling (FEM) approach to predict the milling induced distortion of A17050 thin wall structural parts with complex geometries. The new approach is proposed for applying the estimated mechanical and thermal loads on the final part geometry. Milling experiments are performed on a complex frame geometry to validate the model. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.
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    A novel sensor using photo-interrupter for measuring static friction coefficient
    (Korean Soc Mechanical Engineers, 2020) N/A; N/A; N/A; Department of Mechanical Engineering; Hussain, Abbas; Subaşı, Ömer; Lazoğlu, İsmail; PhD Student; PhD Student; Faculty Member; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; Manufacturing and Automation Research Center (MARC); N/A; N/A; 179391
    A force sensor design utilizing a photo-interrupter is presented for measuring the static coefficient of friction (COF). The measurement of ice friction on polymer surfaces, a process that requires detecting forces in the sub-Newton range, is chosen for the study. The photo-interrupter is coupled with a specially designed sensitive flexure, with structural parameters validated through finite element methods, to detect the small forces. The static properties of the sensor are characterized by calibration techniques. An accompanying rotary table is constructed to measure the COF of ice on polymethylmethacrylate (PMMA) and polyester specimens under refrigeration conditions. The experimental results indicate that the device can be utilized to predict the COF. The designed portable and miniature friction measurement setup can be a compact and cost-efficient alternative to bulky tribo-rheometer equipment.
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    Mechanics of milling 48-2-2 gamma titanium aluminide
    (Elsevier, 2020) Layegen, S. Ehsan; Arrazola, Pedro-J.; Lazcano, Xabier; Aristimuno, Patxi-X.; Subaşı, Ömer; Yavaş, Çağlar; N/A; Department of Mechanical Engineering; N/A; N/A; Hussain, Abbas; Lazoğlu, İsmail; Yiğit, İsmail Enes; Öztürk, Çağlar; PhD Student; Faculty Member; PhD Student; PhD Student; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; College of Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; N/A; N/A; 179391; N/A
    Accurate and fast prediction of cutting forces is important in high-performance cutting in the aerospace industry. Gamma titanium aluminide (gamma-TiAl) is a material of choice for aerospace and automotive applications due to its superior thermo-mechanical properties. Nevertheless, it is a difficult to machine material. This article presents the prediction of cutting forces for Ti-48Al-2Cr-2Nb (48-2-2) gamma-TiAl in milling process using orthogonal to oblique transformation technique. The novelty of this paper lies in reporting the orthogonal database of 48-2-2 gamma-TiAl. Fundamental cutting parameters such as shear stress, friction angle and shear angle are calculated based on experimental measurements. Friction coefficients are identified for two different coating conditions which are AlTiN, and AlCrN on carbide tools. Predicted results are validated with the experimental cutting forces during end milling and ball-end milling operations for different cutting conditions. The simulated results showed good agreement with the experimental results, which confirms the validity of the force model.