Recent content by mtrl

Hi all, I want to ask you a question about the bending moment equation: σ= M * y / I Does this equation have the same form if we assume, -Plasticity instead of elasticity. -Viscoelasticity instead of elasticity. -Nonlinearity instead of linearity. -Anisotropy instead of isotropy...

Thank you nasu. I have understood it now. The book on solid state physics by Kittel is really driving me mad. There are almost no explanations during formula derivations and lots of steps are omitted.

There is a further explanation in the book which i think makes r=r(x,y,z,t) an invalid answer. The book says that exp(+i k.r) and exp(-i k.r) are traveling waves. And a superposition of these two functions, exp(+i k.r) + exp(-i k.r) = 2 cos(k.r) is a standing wave. If r=r(x,y,z,t), then the...

exp(i k.r) ~ A traveling wave ?? I am studying electrons in solids and the wavefunctions of free electrons, which have the form exp(i k.r), are said to be representing traveling waves. Isn't there supposed to be a term involving time in the exponential such as exp (i (k.r -wt)) so that it is a...

Hi everyone, I am currently studying solid state physics from the book by Kittel(8th ed). But in this book, the chapters are like a summary of each topic and detailed explanations do not exist. While proving a formula, several steps are omitted and just the results are given. For this reason...