Gear and Bearing Dynamics Analysis

This study investigates the effect of initial clearance on the maximum stress distribution in pin-loaded lug connections, a critical factor influencing joint strength, durability, and design reliability. To this end, finite element analysis (FEA) was employed to model round-ended lug–pin joints with varying pin–hole c…

Gear scuffing is a major concern and a critical technical challenge in gear power transmission design. This paper reviews current research and practical approaches to understanding and preventing gear scuffing, drawing on both industrial experience, available standardization and academic studies. A dedicated MATLAB-ba…

Abstract The growing environmental concerns associated with petroleum-based lubricants and the increasing demand for sustainable manufacturing have accelerated the search for biodegradable, renewable lubricant alternatives. This study aims to determine the most suitable lubricant among six common commercial vegetable-…

Torque-limiting mechanisms are safety-critical elements in mechanical, automotive, robotic, aerospace and medical systems, where controlled torque transmission is required to avoid overload failure. However, the influence of dent–slot geometry on torque stability, variability and tolerance sensitivity remains insuffic…

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Bu kitap, makine mühendisliğinin günümüzde hızla gelişen beş farklı alanını bir araya getirerek kapsamlı ve disiplinler arası bir bakış açısı sunmaktadır. Kitap; mühendislik sistemlerinde gözlenebilirlik ve fiziksel temsil sınırlarına dair kavramsal bir tartışmayla açılmakta, ardından yüksek entropili alaşımların malz…

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Most data-driven bearing remaining useful life (RUL) estimation studies assume constant rotational speed, which does not reflect real industrial operating conditions. In applications such as electric vehicle drivetrains, bearings operate under continuously varying speed profiles that modulate vibration signal characte…

This study examines the effects of three manufacturing routes—grinding and superfinishing (GR), hard turning and superfinishing (HT), and a sequential combination of hard turning, deep rolling (DR), and superfinishing (DR)—on the surface integrity, noise characteristics, and fatigue life of deep groove ball bearing in…

Reliable bearing fault diagnosis is essential for predictive maintenance of rotating machinery, particularly in applications where contact-based vibration sensors are difficult to install or maintain. This study proposes an explainable acoustic fault diagnosis framework based on Mel-spectrogram representations and a h…

• EMRAH ASLAN
• YILDIRIM ÖZÜPAK

Reliable gearbox fault diagnosis is an important component of condition monitoring and predictive maintenance in industrial systems. Vibration‐based approaches are widely used for this purpose; however, raw vibration signals are often noisy, nonstationary, and affected by changing operating conditions. In this study,…

• YILDIRIM ÖZÜPAK

In this study, the design, manufacturing, modal analysis and flow performance of hydraulic pumps with elliptical and spur gear profiles are compared experimentally. Firstly, both gear types are modeled in a computer-aided design (CAD) environment and their natural frequencies and mode shapes are analyzed using the fin…

• İBRAHİM PAZARKAYA