Contact_Theory

Contact_Theory - Changi ng St at us Nonl i near i t i es 1...

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Unformatted text preview: Changi ng St at us Nonl i near i t i es 1. Cont act Nonl i near i t i es 2. Cont act el ement s advanced opt i ons 3. Node t o Sur f ace & Node t o Node Cont act Cont act Nonl i near i t i es [ 1] . Changi ng St at us ( 1) Cont act Nonl i near i t i es & bi r t h & deat h 1. Cont act Nonl i near i t i es ú = + ª E @« component ˜ ‹ · ª . ˜aË =+ à ‹ · * p 1 ˜ ‹ ·ª component HË · ª * . @ f E @ cont act X× =+ ª E @ . ˜Ã ·ª ( 1- 1) + ªf E cont act ˜ + ªf @ « . cont act 7 @ @ « f E ` . `Ë =+ i nt er f ace ˜ ‹· ª* «fE 7 . 1- 2) ˜ a L=+ @Ë· * p†T cont act ` . p T¹ª * á E= } = + . Hà ·ª * FEM cont act Ë + ªfE @ . ANSYS cont act H ‹ ·ª * component s model i ng . @ @ @ fE ANSYS H à · component ˜ ‹ · model i ng H ‹ ª* . ‘ `Ë =+ ? ’ . 1- 3 ˆ a b H º . H ‹ · ˜a L=+ @à · ª*p ( HË ª* ) . `Ë =+ . ˜ ËL + Ë · ª p† ¹ `ËL + . a, b ˜ ËL= @à · * † connect i on met hod p T ¹ ª á ùE + = + h = fE @ . FEMHà · ª . 1- 3 a b b 1- 1 @ « fE 7 @ . X2 ´ ª p†T¹ * á ùE = Ï =+ , `ËL + , p T¹ * ùE + P = , ˆ . ` L=+ . ˜a L= • ‹ ·ª* p†T cont act bi r t h & deat h . (a) Initial geometry (b) Deformed shape with hydrostatic stresses Motion of Retainer 1- 2 Ret ai ner 1- 4 1- 3) 1- 4) ˜ ËL + ¸OE ¸ * †T . a, b 8 ¸OE ª* connect i on met hod ¨ » 8 ¸OE ª * a b º . Node \ @ fE 7 . Cont act [email protected] @ @ « f ( è =+ ª E @ « fE . , 8¸OE¸ª @ @ fE v ƒ¾ I= p« f . ` L=+ gap el ement 8 OE ¸ª . 1- 5 p& ¹ª* áù =+ à ( a b 8Å ·ª* nodes mer ge ` L= + . ˜aË = @ ‹·ª* p†T poi nt cont act H » ¹ . ` L=+ p†T¹ * á ùE= ú =+ nodes H ^ ¹ mer ge < = fE @ « . 8Å · ª HÄ‹ t ot al l oad ˜ ËL= Å ‹· *p . l oad st r ess •\ . - = f @ ( ) • . , ˜aË =+ @Ä ·ª †T¹ . • •\ . HÄ ·ª* a, b beam t r uss ø] node •\ . =+ fE @ @ fE w ƒ 4 I=+ p« E 8Å‹ ª * . gap el ement Gap el ement H ‹ · 1- 5) 8 ‹ · spr i ng symbol H ‹ ·ª * . Component s 8Å‹ ª * spr i ng h \ . 8Å · spr i ng bi l i near `ËL + mot i on st i f f ness ËL= zer o st i f f ness 8 ‹ · ª . `ËL + @ @« E ÷ ƒ¾ I= + p« f `ËL= . F d k t k c `Ë =+ k t ËL + €]» k c €]» . Bi l i near nor mal st i f f ness 1- 6 Cont act Ë L= 3 è ¶OE ª * • ( spher i cal cont act ) • ( cyl i ndr i cal cont act ) • ضOE ¸ * ( gener al cont act ) p†T ª * á ù =+ N = + . • ض ¸ª* ( dynam i c cont act st r esses) • P- ( sur f ace f at i gue f ai l ur e model s- dynam i c cont act ) • ضOE ¸ª* ( sur f ace f at i gue st r engt h) cont act t r i bol ogy ¼ . Tr i bol ogy Gr eece ' Tr i bos' P } , P } ( r ubbi ng) . Tr i bol ogy P } , f r i ct i on( ) , wear ( ) , l ubr i cat i on( ) P } . •ª = ª fE @ f ` L=+ ] P} . º @ @«f ƒ¾ I= p« E è¶OE ª * . `ËL + , `Ë =+ @@ @«f f ƒ 4I= p« E ˜aË =+ жOE¸ª p , ˜aËL + à OE¸ * p Tr i bol ogy P ....
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Contact_Theory - Changi ng St at us Nonl i near i t i es 1...

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