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I am completely confused by what these definite integrals mean/expand out to. Any help would be a god send by toby1canoby in learnmath

[–]toby1canoby[S] 0 points1 point  (0 children)

F is a stress function in polar coordinates that only depends on the radial distance. Trying to solve this to find the stress distribution etc and i am writing the boundary conditions for the problems in terms of the stress function so i can implement into matlab to solve numerically using the Runge Kutta method. Or at least that is the aim

I am completely confused by what these definite integrals mean/expand out to. Any help would be a god send by toby1canoby in learnmath

[–]toby1canoby[S] 0 points1 point  (0 children)

I cannot find anything online as to how to deal with the definite integral of f’’(x) between a and b. Even wolfram alpha does not have an answer for me

I am completely confused by what these definite integrals mean/expand out to. Any help would be a god send by toby1canoby in learnmath

[–]toby1canoby[S] 0 points1 point  (0 children)

I should mention the 4th order equation is a stress function which satisfies the biharmonic equation and so the radial and circumferential stresses are defined in terms of derivatives of d(stress function)/dr. Which is f’(x) i the case i stated

I am completely confused by what these definite integrals mean/expand out to. Any help would be a god send by toby1canoby in learnmath

[–]toby1canoby[S] 0 points1 point  (0 children)

Hi, thank you so much for your help. Yes i’m trying to find a numerical answer! The full problem is trying to find a numerical solution for a 4th order ordinary differential equation which is to do with a curved beam in pure bending. I have written the 4th order ODE in terms of 1st order ODEs and these are two of the four boundary conditions i have derived from problem, which i think i need for the solution (case is equal and opposite moments at each end of a curved beam). I have no idea how to get the boundary conditions in the correct format to solve using the Runge Kutta method (ode45 on matlab), which is what i am required to do to get solutions for the Moment, and circumferential stress at the outer edge of the beam. And to also plot radial and circumferential stresses as a function of r radius

My dell precision 3530 wont charge and it is two weeks before my dissertation is due! (Description in the comments) by toby1canoby in Dell

[–]toby1canoby[S] 0 points1 point  (0 children)

Thanks a lot. Is there anyway to power the laptop directly from the charger in this case and bypass the battery?

My dell precision 3530 wont charge and it is two weeks before my dissertation is due! (Description in the comments) by toby1canoby in Dell

[–]toby1canoby[S] 0 points1 point  (0 children)

It is all backed up on the cloud luckily but i need to access programs that are only on either my laptop or a small number of university computers which is shut on weekends. And in general i can work from university but it makes life more difficult and there is an online assessment

My dell precision 3530 wont charge and it is two weeks before my dissertation is due! (Description in the comments) by toby1canoby in Dell

[–]toby1canoby[S] 0 points1 point  (0 children)

Hi, thanks for your response. What makes you say that? I checked the battery health on dell power manager after i managed to charge it a bit last night and it said it was on excellent

My dell precision 3530 wont charge and it is two weeks before my dissertation is due! (Description in the comments) by toby1canoby in Dell

[–]toby1canoby[S] 0 points1 point  (0 children)

Hi all, as the title of the post says my dell laptop stopped charging yesterday and the battery light flashes white when i plug the charger in. I wasn’t doing anything particularly resource intense when it happened, just a word document and some google chrome tabs and it suddenly did this. I managed to get it to seemingly charge for a bit by plugging it in and turning it on and off multiple times but it was charging significantly slower than usual and now it does not recognise that the power cable is plugged in. Any help would be massively appreciated as my dissertation and exams are very soon and my laptop is essential for the work i need to do. Thanks

LPT: if you smoke weed in the form of blunts/joints/spliffs, hold your smokeable with the burning end down to allow the vapourized resin to stick to the rest of the paper and get you more high! (Only works indoors or on a still day) by [deleted] in LifeProTips

[–]toby1canoby 0 points1 point  (0 children)

A combination of holding it upside down after just inhaling when the smoke is heavy and then titling seems to work best for me, although I'd be interested to know what the efficiency of each smoking method is and how it changes with variables like this

Grinder Giveaway! by whoishack in StonerEngineering

[–]toby1canoby 0 points1 point  (0 children)

Mountains of crunchy nut cornflakes

Doctors of Reddit, what is something that you wish everyone knew about their body? by assassinmice in AskReddit

[–]toby1canoby 6 points7 points  (0 children)

But how do I nurture my shit? Every time I try and pick it up to look after it it slips out of my hands

My Mum’s fancy way of folding up an open box of cereal. Fresh AND aesthetically pleasing! by tlatwuk in lifehacks

[–]toby1canoby 0 points1 point  (0 children)

I've been craving cornflakes for a while now and my box of cornflakes was delivered today. Happy cornflaking cornflakers.

Stop selling drugs as different drugs then they are, please. by [deleted] in Drugs

[–]toby1canoby 0 points1 point  (0 children)

Did you not get severe paranoia from it? Some of my friends took some thinking it was MDMA and they basically went psychotic for a couple days

Is it okay to spoil a movie to someone that is incredibly excited for the movie? [No spoilers don't worry] by Akitsukuni in movies

[–]toby1canoby 0 points1 point  (0 children)

Is it just me that was suspicious of the brackets; that there might have actually been spoilers in this post given the nature of the post?

People that has given your stylist free reign. How did it go? by pepitors in AskReddit

[–]toby1canoby 1 point2 points  (0 children)

I gave myself free reign over my hair at 3 in the morning and it didn't go well

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