Dear Dheeraj, isotropic materials are those materials for which various properties are direction independent. One more thing it is a relative term, the same material may be isotropic with respect to certain properties and the same may be anisotropic with respect to some other properties. As per your question you have not mentioned which property you wish to check for isotropicity. Kindly mention it for further disscussion..

.............................sksharma

Dear Dheeraj, isotropic materials are those materials for which various properties are direction independent. One more thing it is a relative term, the same material may be isotropic with respect to certain properties and the same may be anisotropic with respect to some other properties. As per your question you have not mentioned which property you wish to check for isotropicity. Kindly mention it for further disscussion..

.............................sksharma

Hi Dheeraj...., What is Isotropic material? (in fact, you can find from textbooks or internet). Anyway, by definition in general, uniformity in all orientations. More detail, it is dependent on the applications or subject areas.  

The 2nd question, how will we decide the directions of properties in a material?

do you mean the direction in crystallography related to physical properties?

if yes, I think, you have to run the analysis that is accustomed to material tests such as XRD, HRTEM, AFM, Capacitance Spectroscopy (DLTS), and others. I hope this will be useful.

If the response of the material is independent of the orientation of the load axis of the sample, then we say that the material is isotropic or in other words we can say that isotropy of a material in a characteristics, which gives us the information that the properties are the same in the three orthogonal directions x y z, on the other hand if the response is dependent on orientation it is known as anisotropic.

Dear Suresh, Rudy, Vijay,

Thanks a lot for your valauble answers..!!

My qusestion was related to all mechnical properties of the material. I have got the clarity to some extent. I have changed the question for more clarification.