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…
Month: May 2015
Assumptions and Analysis of Plain Truss
Truss A framework composed of straight members joined at their ends to form a structure to bear loads is called a truss. It is one of the major structures commonly…
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…
Tips for Formal Letter Writing
Be concise State the purpose of your formal letter in the first paragraph and don’t veer from the subject. Try to avoid flowery language or long words. Keep the letter…
Paragraph Development
A typical expository paragraph starts with a controlling idea or claim, which it then explains, develops, or supports with evidence. Paragraph sprawl occurs when digressions are introduced into an otherwise…