مقایسهٔ روش‌ها

	روانکاری الاستوهیدرودینامیک	طراحی برای تولید و مونتاژ
حوزه	ساخت و تولید	ساخت و تولید
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1977	1994
پدیدآور	Dowson, D., Higginson, G. R.	Boothroyd, G., Dewhurst, P.
نوع	Mathematical model for lubricated contacts	Systematic approach to cost-effective product design
منبع بنیادین	Dowson, D., & Higginson, G. R. (1977). Elastohydrodynamic Lubrication: The Fundamentals of Roller and Gear Lubrication. Pergamon Press. ISBN: 0-08-021710-4	Boothroyd, G., Dewhurst, P., & Knight, W. A. (1994). Product Design for Manufacturing and Assembly (1st ed.). Marcel Dekker. ISBN: 0-8247-9157-6
نام‌های دیگر	EHL, Elastohydrodynamic film, Hydrodynamic lubrication	DFMA, Design for manufacturability, DFA
مرتبط	4	4
خلاصه	Elastohydrodynamic lubrication (EHL) is the regime of fluid film lubrication in which elastic deformation of the surfaces plays a crucial role in maintaining a fluid layer between sliding or rolling surfaces. In applications like roller bearings and gears, the contact pressure is extremely high, causing the lubricant viscosity to increase dramatically and the surfaces to deform elastically. EHL theory, developed rigorously by Dowson and Higginson, predicts the film thickness, pressure distribution, and friction in these heavily loaded contacts.	Design for Manufacturing and Assembly (DFMA) is a systematic methodology for creating products that are inherently easier and less expensive to manufacture and assemble. Developed by Boothroyd, Dewhurst, and Knight, DFMA evaluates design choices based on their impact on production cost, quality, and speed, guiding designers toward solutions that balance performance, manufacturability, and economics.