Recent content by sriram123

The platen material will be cast steel (IS 1030).There will be two plates.A grooved plate and a covered plate.The grooved plate will be having the steam flow path.The cover plate will be welded to the grooved plate so that they form a passage.The steam will have a max. pressure of 14 bar.It will...

Hi all, I'm looking for design of steam platens for Rubber curing presses.The steam platens heat the green rubber article while curing.Other mediums such as oil,induction heating are also available,but I'm more interested in design of steam platens. There is one patent available in google...

Hi all,I just started to learn mechanics so please forgive me if i ask something elementary.I have an example from Egor P Popov's Engineering mechanics of solids.(Please refer attachment and sorry about quality of drawing). This is a problem of a pin joint system subjected to vertical load...

First of all thanks for the replies. I just wanted to understand a simple system with say deep groove ball bearings.I went through some references and now i think i have some of my questions answered. What I don't understand still is how do radial and thrust bearings differ construction...

Hi all, I have recently started my machine design course in engineering and I am finding the topic of bearings difficult to follow. I understand the need for bearing.What I cannot understand is what axial,radial and tangential loads will try to do with the bearing (especially the tangential...

hi all, This is a question regarding calculation of effort required to over come the inertia of a body.Let us have a ring(Some random example) which is supported by three rollers(Ring is sitting on the rollers).To rotate the ring,the applied effort has to overcome the friction and inertia of...

Hi all, I am not clear with the concept of "Cooling" a body.I know that the temperature of a body is the average kinetic energy of the molecules or atoms in the body.When heat energy is supplied,the molecules have more vibrations and hence the temperature increases.Let us have two bodies at...

You need to tell what is the size of the fixture you are designing.You might be interested in Plug valves where the plug has a linear motion followed by rotary motion.I suggest you to search for some patents which use a cylindrical cam mechanism.

"For simple loadings like tension on a prism, the function takes on a simple form when the axes of the coordinate system are aligned with the principal stress direction. However, the same function will give the correct answer if the axes of the coordinate system are rotated so there are shear...

@ chestermiller Thanks for you Reply When we are plotting a stress strain curve for a material in tension ,How do we ensure that the material will fail by pure tension (Necking for ductile materials)?.If shear strength is less than tensile strength won't the material fail by shear first?.Then...

Hi all, I'm having problems with visualising shearforce for a body.Let us take a rectangular prism and fix one of its ends.Let the other end be subjected to a tensile force T Newtons.The normal stress acting on the cross section is the tensile force /area of cross section perpendicular to...

Hi all, I know this is a very basic question and has been discussed in various threads.Anyway i would i like to ask this. If the value of friction only depends on coefficient of friction and normal force, why is rolling friction less than sliding friction? Is it because the value of Rn the...

A correction.In my second para I mis typed as "shear load on bolt" actually i meant "shear load on washer" . Sorry for the mistake. Thanks in advance

Hi all, Just curious about how to size the thickness of washer for a particular class of bolt.(I'm not actually designing one but want to know how standard washers are sized.)I'm having a feeling that the washer will be under compression (Bearing surface of bolt head or nut).Bending will be...

Hi all, I'm a first year Mechanical engineering student.The question is regarding strength of materials.I'm having problem with understanding the concept of Uniformly Distributed load.It was said that a beam's self weight is UDL for the beam.What is the difference between Pressure acting on...