/sci/ - Science & Math

[Anonymous No.3806940]

that fucking feel when you have a mechanics of solid exam at 7 pm tomorrow 17 hours from now and you don't know shit. thermal expansion and statically indeterminate fucking problems...... FUck

[Anonymous No.3806945]

bump engineernig mechanics faggots

solids* btw

[Anonymous No.3806954]

>>3806940

1: Static Equilibrium
2: Load-Deflection
3: Deflection Compatibility

That's all you need for statically indeterminate problems.

[Anonymous No.3806986]

same feel as when you have QM hw due 8am today and havne't learned shit in last 4 weeks?

[Anonymous No.3806994]

<div class="math">\mathsf{T} = \mathsf{c} \mathsf{S}</div>
<div class="math">\mathsf{S} = \mathsf{s} \mathsf{T}</div>

where <span class="math">\mathsf{S}[/spoiler] is the strain tensor (3x3), <span class="math">\mathsf{T}[/spoiler] is the stress tensor (3x3), <span class="math">\mathsf{c}[/spoiler] is the stiffness tensor (3x3x3x3) and <span class="math">\mathsf{s}[/spoiler] is the compliance tensor (3x3x3x3) (yes, I didn't mix the two of them up, the most common symbols are actually switched around).

Also

<div class="math">\mathsf{S} = \mathsf{a}(T_0) \Delta T</div>

where <span class="math">\mathsf{a}[/spoiler] is the thermal expansion tensor (3x3), which is a function of temperature, and <span class="math">\Delta T = T-T_0[/spoiler] is obviously the difference in temperature from the temperature the tensor is known at.

That should be quite enough for what you need.

[Anonymous No.3806996]

that feel when you've finished university, got an honors masters degree, but dont want a job because you really just want to work for yourself
that feel when you've been living on less than 1k for 8 months

[Anonymous No.3806998]

>mfw you should be studying instead of bitching and crying on 4chan

[Anonymous No.3807008]

>>3806954
yes thats easy enough to say - i understnad everything on paper but i CANT Do the fucking practice problems for shit

[Anonymous No.3807012]

>>3806954
u a mechE? you work for an oil/gas company or grad schooling?

[Anonymous No.3807026]

>>3807008

Just write out all the equations you can and try to relate them. That usually works if all else fails in terms of understanding.

>>3807012

Mechanical engineering senior here. I just recently finished a 6 month internship with a company that makes large machine tools.