Hello all,(adsbygoogle = window.adsbygoogle || []).push({});

I'm working on a problem related to my MS thesis (in Civil Engineering, not mathematics). I have come across an integral on which I have spent entirely too long.

If I could get some pointers, I'd greatly appreciate it.

[tex]\int [E(x) \cdot (u''(x))^2 \cdot dx] [/tex]

It is a definite integral over the length, L, of a beam, but that doesn't really matter too much.

E(x) = Eo*(1+x/L) with Eo and L being constants

u(x) = a2*x^2+a3*x^3+a4*x^4 with a1, a2, a3, and a4 being constants

u''(x) is the second derivative of u(x) with respect to x.

Any help would be greatly appreciated.

Thanks,

JRautenb

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# *Impossible* Integral?

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