- #1

hagopbul

- 357

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- TL;DR Summary
- reviewing the introduction to solid state physics by charles kettle and in the 3ed chapter there is this equation that is little unclear

Hello All :

i am reviewing charlse kettle book introduction to solid state physics and came across an equation in the 3ed chapter which is a bit unclear

hope that physics forums members can clear it more if that possible

the equation 1st mentioned in the 3ed chapter page number 84

it is about the elastic energy density U :

##U =(1/2)\sum_{\lambda=1}^{6}\sum_{\mu=1}^{6}[C_{\lambda\mu}e_{\lambda}e_{\mu}]##

then the writer start deriving the above equation which i didnt understand , could any one explain it especially that the above equation is consist of constants (c,e)?

Best

Hagop

i am reviewing charlse kettle book introduction to solid state physics and came across an equation in the 3ed chapter which is a bit unclear

hope that physics forums members can clear it more if that possible

the equation 1st mentioned in the 3ed chapter page number 84

it is about the elastic energy density U :

##U =(1/2)\sum_{\lambda=1}^{6}\sum_{\mu=1}^{6}[C_{\lambda\mu}e_{\lambda}e_{\mu}]##

then the writer start deriving the above equation which i didnt understand , could any one explain it especially that the above equation is consist of constants (c,e)?

Best

Hagop