Eurocode 1993-1-10:2005

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Jam555s Participant Join Date: Jul 2009 Posts: 1	Eurocode 1993-1-10:2005 07/13/2009 6:59 AM
	I am an engineering student currently on a work placement at a steel fabricators My boss has asked me read "Eurocode 1993-1-10:2005" regarding maximum thickness of steel elements with respect to temperature, grade of steel, different stress levels etc In this standard it talks about then gives a table of test results (table 2.1) which it says can be interpolated, but in section 2.4 it says that the maximum thickness values can also be obtained also by fracture mechanics but doesn't give any formulas My boss has asked me to use fracture mechanics from British standards or eurocodes, to create a spreadsheet that will, either work out a maximum thickness for a given grade of steel and temperature etc, or opposite work out a appropriate grade of steel for a maximum thickness size and temp, Here's my understanding so far As an engineer we want steel to fail in a ductile elastic way, and not a brittle sudden way, the standard talks about the charpy toughness test, and that the colder a steel gets the more brittle it becomes for specific grade of steel. With respect to toughness for it to not fail in a brittle way, it must not break at an activation energy of less than 27J (joules) no matter the temp So I assume that it if the temperature called "T27J" 27J at say 20⁰c then below 20⁰ it is brittle It appears reading between the lines that the yield strength is also depended on temperature Also from the table, I know that for grade of steel say S275 JR, that the S means structural the 275 means the yield strength, but what does the JR mean? ,( I think it means room temp i.e. 20⁰) So for a specific grade of steel, and a certain temp when making a say a universal column, or a hollow section, there comes a point where the thickness if increased will change from ductile to brittle and fail at less than 27J So it's the relationship between the grade of steel (or yield stress with respect to temp) and element thickness I need formulas and help with, please go easy on me, and keep things in layman's terms as I am not a graduate yet My e mail is Jam555bo@hotmail.com Thanks again James Stewart
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#9 "Re: Eurocode 1993-1-10:2005" by babybear on 07/14/2009 9:13 PM (score 1)

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Eurocode 1993-1-10:2005 07/13/2009 7:23 AM
	It is highly inadvisable to post an e-mail address in an international forum. E-mail addresses are easily harvested by spambots. They quickly bombard it with advertisements for non-prescription pharmaceuticals, scam requests to update on-line banking details, links to matters of an intimate nature and scams purporting to be about getting large sums of money out of Nigeria, rendering the address practically useless. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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babybear Guru Join Date: Jun 2008 Location: USA/Europe Posts: 4547 Good Answers: 68	#4 In reply to #1 Re: Eurocode 1993-1-10:2005 07/14/2009 5:26 AM
	Hello PWS, Hope you are well? I thank you for telling the OP that it is not a good idea to publish his email! I often post this to whom ever does this. I am pleased I am not the only one who feels this way! A NOTE to the Original Poster (OP). Please get in touch with Admin on this site, give them the thread and post in which you published your email and ask for them to remove it. If you wish to enter stuff which by its nature is 'private', use the PM device, and you can say anything to or about anyone with the rest of the site's 'open forum' knowing nothing! __________________ Take it easy, bb. >"HEAR & you FORGET<>SEE & you REMEMBER<>DO & you UNDERSTAND"<=$=\|O\|=$=>"Common Sense is Genius dressed in its Working Clothes"<>[Ralph Waldo Emerson]
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Circuit Breaker Guru Join Date: Jul 2006 Location: CA (Central Arkansas, USA) Posts: 599 Good Answers: 10	#5 In reply to #1 Re: Eurocode 1993-1-10:2005 07/14/2009 9:30 AM
	Hello PWS! I could not remember what the length of a "chain" is, so I finally got around to looking it up. Is it 7 surveyor's chains (20 M ea) or 7 Engineers chains (30 M) ea? -- JHF __________________ If it's too good to be true, it probably isn't
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#6 In reply to #5 Re: Eurocode 1993-1-10:2005 07/14/2009 9:39 AM
	... think you'll find that'll be 22 yds. __________________ "Love justice, you who rule the world" - Dante Alighieri
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Circuit Breaker Guru Join Date: Jul 2006 Location: CA (Central Arkansas, USA) Posts: 599 Good Answers: 10	#7 In reply to #6 Re: Eurocode 1993-1-10:2005 07/14/2009 9:57 AM
	Thanks, I questioned the accuracy of the reference because it said the Surveyors Chain was 20 M or 66 Ft, which is 22 Yds, and the Engineers Chain was 30 M or 100 Ft. Without calculating, that looked like a substantial rounding error. Or is the length of a "Chain" different on the west side of the pond? -- JHF __________________ If it's too good to be true, it probably isn't
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#8 In reply to #7 Re: Eurocode 1993-1-10:2005 07/14/2009 6:54 PM
	English measure: 1 rod^† = ¹/₄ chain, 1 chain = 22 yds = 66 ft (distance between wickets on a cricket pitch) 1 chain = ¹/₁₀ furlong, 1 furlong = 220 yds = 660 ft 1 furlong = ¹/₈ mile, 1 mile = 1760 yds = 5280 ft Engineer's, or Ramsden's chain (100ft) seems to have been used only in the US. Scots, Welsh & Irish measures may be different. ^†AKA 'pole' or 'perch'. __________________ "Love justice, you who rule the world" - Dante Alighieri
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babybear Guru Join Date: Jun 2008 Location: USA/Europe Posts: 4547 Good Answers: 68	#9 In reply to #6 Re: Eurocode 1993-1-10:2005 07/14/2009 9:13 PM
	Hello JohnDG, How are you? Just to say you are correct. Sounds crazy now but, the length of a 'chain' etc is directly related to the old english 'Mile', 'Furlong' etc. Lengths 1 nail = 2¼ inches 4 inches = 1 hand 12 inches = 1 foot 3 foot = 1 yard 5.5 yards = 1 rod 6 foot = 1 fathom 22 yards = 1 chain 100 links = 1 chain 10 chains = 1 furlong 8 furlongs = 1 statute mile 6080 foot = 1 nautical mile It does sound like a 'foreign language', but there is other links to the 22 yard 'chain' which is the distance between the 'stumps' on a cricket ground So it is still in use as a measurement! __________________ Take it easy, bb. >"HEAR & you FORGET<>SEE & you REMEMBER<>DO & you UNDERSTAND"<=$=\|O\|=$=>"Common Sense is Genius dressed in its Working Clothes"<>[Ralph Waldo Emerson]
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Sciesis2 Guru Join Date: Oct 2006 Location: Vancouver (not BC) Washington (not DC) US of A Posts: 1261 Good Answers: 12	#12 In reply to #9 Re: Eurocode 1993-1-10:2005 07/17/2009 11:44 PM
	BB.... Thanks for the good info... I have frequently wondered about such seldom used measurements. GA Bill
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babybear Guru Join Date: Jun 2008 Location: USA/Europe Posts: 4547 Good Answers: 68	#13 In reply to #12 Re: Eurocode 1993-1-10:2005 07/18/2009 1:53 AM
	Hello Sciesis, Many thanks for the GA! Some of these measurements were used in the 20 C, and the Fathom to mention just one, is still used of course. __________________ Take it easy, bb. >"HEAR & you FORGET<>SEE & you REMEMBER<>DO & you UNDERSTAND"<=$=\|O\|=$=>"Common Sense is Genius dressed in its Working Clothes"<>[Ralph Waldo Emerson]
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#2 Re: Eurocode 1993-1-10:2005 07/13/2009 7:26 AM
	Haven't got the first idea what you're talking about - not my field - but welcome to CR4, & congratulations on posting a question you've clearly thought about first, and phrased & laid out well. I hope someone here can help. (BTW - not a good idea to post your email address in an open forum - there's a good chance it'll attract a lot of spam. As it's a hotmail account, I guess it doesn't matter too much (you can chuck it away & open another one - as long as you're not relying on it as your only account)). __________________ "Love justice, you who rule the world" - Dante Alighieri
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Anonymous Poster	#3 Re: Eurocode 1993-1-10:2005 07/14/2009 5:24 AM
	have a look at corus steel website
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babybear Guru Join Date: Jun 2008 Location: USA/Europe Posts: 4547 Good Answers: 68	#10 Re: Eurocode 1993-1-10:2005 07/14/2009 10:10 PM
	Hello Jam555s, Check this site out and go to page 364................. The reference to "J-R curves" is explained as the Partial Unloading Range on the j-R Curves of ASTM A106 and 3-Ni Steels. It explains how to generate the curves and compare them to the curves using "elastic unloading" of the two steels. Hope this helps. Please let me know. __________________ Take it easy, bb. >"HEAR & you FORGET<>SEE & you REMEMBER<>DO & you UNDERSTAND"<=$=\|O\|=$=>"Common Sense is Genius dressed in its Working Clothes"<>[Ralph Waldo Emerson]
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babybear Guru Join Date: Jun 2008 Location: USA/Europe Posts: 4547 Good Answers: 68	#11 Re: Eurocode 1993-1-10:2005 07/14/2009 10:20 PM
	Hello Guest, Dare I ask if you refer to my post on J-R curves? If so I am grateful! __________________ Take it easy, bb. >"HEAR & you FORGET<>SEE & you REMEMBER<>DO & you UNDERSTAND"<=$=\|O\|=$=>"Common Sense is Genius dressed in its Working Clothes"<>[Ralph Waldo Emerson]
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#9 "Re: Eurocode 1993-1-10:2005" by babybear on 07/14/2009 9:13 PM (score 1)

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Users who posted comments:

Anonymous Poster (1); babybear (5); Circuit Breaker (2); JohnDG (3); PWSlack (1); Sciesis2 (1)

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