genoyamamoto 0 #1 November 10, 2004 I am trying to calculate the defelction of a cantilever with an end load. The rectangular beam is composed of two thin skins of carbon composite and a rvc carbon foam filling between the two skins. I know young's modulus for both materials. Can you tell me how to solve for the deflection vs. position along the beam? I'm also interested in the deflection of this system from gravity. Thanks. Gotta go... plaything needs to spank me Feel the hate... Photos here Quote Share this post Link to post Share on other sites
hookitt 1 #2 November 10, 2004 Yes... Cheat ==> use this Keep in mind I just googled calculate the deflection of a cantilever with an end load and came up with that. I haven't a clue what it is. My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto Quote Share this post Link to post Share on other sites
genoyamamoto 0 #3 November 10, 2004 Unfortunately it's a bit more complicated because of the skins on the beam. I've tried several approximate solutions, one being identical to the one shown on that web page but it doesn't work well because young's modulus is much higher for the skin than for the foam core. Gotta go... plaything needs to spank me Feel the hate... Photos here Quote Share this post Link to post Share on other sites
NoRules 0 #4 November 10, 2004 have you tried using singularity functions? i think you could probably figure out the deflection for each material and use superposition to simply add the deflection at each point. look at the example problem... a fixed end support would have a Mo and a Vo. let me know if that makes sense... or even works or actually, it might actually only be the deflection from whichever material deflects more... just a thought. ~ * Life Has No Rules * ~ Quote Share this post Link to post Share on other sites
captainbb7 0 #5 November 10, 2004 I'll give you a hint... find the neutral surface of the composite structure... Quote Share this post Link to post Share on other sites
SeaKev 0 #6 November 10, 2004 Shit, Geno. It's gonna bend a little. Move on. Quote Share this post Link to post Share on other sites
genoyamamoto 0 #7 November 10, 2004 QuoteShit, Geno. It's gonna bend a little. Move on. Will you be my boss? Gotta go... plaything needs to spank me Feel the hate... Photos here Quote Share this post Link to post Share on other sites
FreeflyChile 0 #8 November 10, 2004 AHHH I am getting flashbacks from engineering...make it stop!! then i look in front of me and see a civil procedure law book as i am in law school..... but it's still better than engineering!!!!!!! Quote Share this post Link to post Share on other sites
crewkeith 0 #9 November 10, 2004 just draw me a pic. ill build it in then you can just measure the damn thing. but it wouldnt come up the same as your computations though. the real thing would of course be wrong. .The skies are no longer safe I'm back Quote Share this post Link to post Share on other sites
genoyamamoto 0 #10 November 10, 2004 HAH! Actually, we have built it and have measurements. It's be nice to know that I understand the structure tho... Gotta go... plaything needs to spank me Feel the hate... Photos here Quote Share this post Link to post Share on other sites
climbnjump 0 #11 November 10, 2004 This might help you get started... http://www.thelaminator.net/ Quote Share this post Link to post Share on other sites
sunshine 2 #12 November 10, 2004 ___________________________________________ meow I get a Mike hug! I get a Mike hug! Quote Share this post Link to post Share on other sites
skydiverton 0 #13 November 10, 2004 Not that easy to understand. http://composite.about.com/library/docs/mil-hdbk-23/blcover.htm If you mail me the properties I will try to do a guess for you ++++++++++++++++++++++++++++++++++++++++++++ Using your droque to gain stability is a bad habit, Especially when you are jumping a sport rig Quote Share this post Link to post Share on other sites
