Normal Stress Stress is defined as the strength of a material per unit area or unit strength. It is the force on a member divided by area, which carries the…
Category: B.Tech./1Sem/Mechanical Engg
Understanding of Simple Stress and Strain
Stress The term stress (s) is used to express the loading in terms of force applied to a certain cross-sectional area of an object. From the perspective of loading, stress…
Mechanics of Deformable Solids
Mechanics of Deformable Solids : The mechanics of deformable solids is more concerned with the internal forces and associated changes in the geometry of the components involved. Of particular…
Method of Joints
The free-body diagram of any joint is a concurrent force system in which the summation of moment will be of no help. Recall that only two equilibrium equations can be…
Perfect Truss & Imperfect Truss
Analysis of frames: A frame is a structure made of several bars/ rods welded / rivetted together The bars are angle irons/ channels of “i” or “t” sections. These are…
Theory of dry friction
Experimental evidence and theoretical models are presented supporting the conjecture that dry friction stick-slip is described by self-organized criticality. We use the data, obtained with a pin-on-disk tribometer set to…
Wet and Dry Friction
There is much debate concerning how wet and dry surfaces affect friction. There is no really good answer without knowing what one surface is wetted with. If, for example, a…
Comparison Between Rigid Frames and Trusses
Following is the comparison between rigid frames and trusses. Trusses Rigid frames Joints are considered as having frictionless pins in trusses with no moments at the member ends. The…
Co-efficient of friction, Angle of friction, Angle of limiting friction, Angle of repose, Cone of friction for Btech first year
Co-efficient of friction: The magnitude of the limiting friction bears a constant ratio to the normal reaction between the two surfaces of contact and this ratio is called coefficient of…
Coulomb’s Law of Friction
This law is termed Coulomb’s law of friction and is also sometimes referred to as Amontons’ third law of friction. The law states that for two dry solid surfaces sliding…