Theory for Adhesion, Friction, Abrasion and Related Problems

Writing and Related Problems for EFL Students

ESL students who write in English may present written material in a rhetorical and organizational mode that reflects the pattern which is valued in their native culture and rhetoric. Considering the violation of English code of writing in the writings of Iranian students, we will notice one common characteristic: They are reluctant (or ignorant of) to write a unified paragraph. Their writing co...

global results on some nonlinear partial differential equations for direct and inverse problems

در این رساله به بررسی رفتار جواب های رده ای از معادلات دیفرانسیل با مشتقات جزیی در دامنه های کراندار می پردازیم . این معادلات به فرم نیم-خطی و غیر خطی برای مسایل مستقیم و معکوس مورد مطالعه قرار می گیرند . به ویژه، تاثیر شرایط مختلف فیزیکی را در مساله، نظیر وجود موانع و منابع، پراکندگی و چسبندگی در معادلات موج و گرما بررسی می کنیم و به دنبال شرایطی می گردیم که متضمن وجود سراسری یا عدم وجود سراسر...

Friction in Adhesion

The effect of interfacial friction on adhesion was studied by using a model system, in which a thin strip of silicone elastomer was peeled from a PDMS (poly(dimethylsiloxane)) treated glass slide. The fluorescent particle tracking method revealed that the elastomer stretches and slides on glass well before the crack faces open up. Interfacial energy dissipation due to friction, which is the pro...

Investigating the effect of nanocoating on friction loss and abrasion in the piston rings

The piston ring which prepares mechanical sealing of a combustion chamber, should have significant abrasion resistance and less friction loss, using appropriate ring coating. The coating widely used is CrN, because of its good abrasion resistance at room temperature. However, it suffers from some shortcomings, such as high abrasion rate at temperatures above 200°C and lack of self-lubricating p...

Concept Learning: Theory, Applications and Related Problems