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You are not logged in. #1 20130418 07:35:56
Compressing a milelong steel barHi, #2 20130418 08:44:13
Re: Compressing a milelong steel barhi BeamReacher You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #3 20130418 08:57:46
Re: Compressing a milelong steel barHi Bob The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #4 20130418 10:53:01
Re: Compressing a milelong steel barHi anonimnystefy;
Back in the old days it was a foot not an inch. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #5 20130419 01:48:27
Re: Compressing a milelong steel barThanks for the responses! Do you have a link to Forman's book? #6 20130419 01:55:21
Re: Compressing a milelong steel barYou can google for it. The title is In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20130419 04:51:03
Re: Compressing a milelong steel barAha. I had always assumed it was one of those problems which seems complex on the outside but has a simple answer if you could just see it. Looks like it's just the opposite  seems simple but it ain't. #8 20130419 05:08:53
Re: Compressing a milelong steel barYes, I had one of them too. If I remember they had a single precision of about 67 and a double precision of about 1516. But the trig functions were single precision. The amount of round off error on this problem could chew that machine right up. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #9 20130419 05:33:50
Re: Compressing a milelong steel barOh, yeah, it's the one from the exact beginning of the book. I haven't had enough time to go through the whole book yet, though. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #10 20130419 05:34:56
Re: Compressing a milelong steel barYep, that problem has a foot instead of an inch. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #11 20130419 05:36:45
Re: Compressing a milelong steel barOkay. But, for some reason, I didn't think it would be a circle arc. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #12 20130419 05:47:15
Re: Compressing a milelong steel barI did not think about it. It really should be stated in the problem. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #13 20130419 05:54:50
Re: Compressing a milelong steel barI think there is only way a steel bar can be when bent like that, but I will leave that up to physicists. Last edited by anonimnystefy (20130420 03:46:21) The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #14 20130419 05:55:37
Re: Compressing a milelong steel barThe amazing thing is 44+ ft for a 1ft bar! In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #15 20130419 05:57:01
Re: Compressing a milelong steel bar1 foot bar? The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #16 20130419 06:05:04
Re: Compressing a milelong steel barYes, the Forman problem is a 1 ft piece but it is easily modified for this problem. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #17 20130420 03:13:50
Re: Compressing a milelong steel bar
What do medical doctors know about steel bars? #18 20130420 03:17:08
Re: Compressing a milelong steel barHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #19 20130420 05:40:11
Re: Compressing a milelong steel barhi
This is available from Amazon. The problem is shown in the 'Look Inside' advert. The solution is not. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #20 20130420 06:36:44
Re: Compressing a milelong steel barMr. Moderator, if it please you, I would be very grateful if you could show me how to solve this problem. #21 20130420 07:09:18
Re: Compressing a milelong steel bar
I guess my solution is not necessary, okay. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #22 20130420 08:04:59
Re: Compressing a milelong steel barhi bobbym, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #23 20130420 19:07:31
Re: Compressing a milelong steel barThis question seems to be about bending of a bar. #24 20130420 19:09:49
Re: Compressing a milelong steel barHi Bob; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #25 20130420 22:22:05
Re: Compressing a milelong steel barIf the bar were, by some immense stroke of luck, to remain straight the axial pressure to reduce its length by one inch would be a small fraction of a pound per square inch. 