UNIT – I PART –B
1. Obtai Obtain n an expr expressio ession n for E1, E2, and G12 in terms of material properties with respect to principal material directions using mechanics of material approach. 2. What are the advantages of composite material? nd explain its area of application? !. "how the reduction of anisotropic anisotropic material stress#strain stress#strain e$uations to those of monoclinic material stress#strain e$uations. %. &or a graphite'epo graphite'epox( x( unidirectional unidirectional lamina, )nd the following. following. *a+ ompliance matrix. *b+ -inor poisons ratio. *c+ educed sti/ness matrix. *d+ "trains in the 1#2 co#ordinate s(stem if the applied stresses are 012-a, E1131Ga, E214.! Ga, 5124.23, G126.16 Ga. 7. Explai Explain n the 8oo9e 8oo9e:s :s law for di/erent di/erent materials? materials?
UNIT – II PART – B
1. &or g glass lass epox( epox( llaminat aminate e Ef 37 Gpa, Em !.% Ga, Ga, 5m 4.! and 5f 4.27, find the minor oisson:s ratio 521 and G12 for a )ber volume fraction of 64;. 2. What weight of glass )bers must must be add added ed to 19g of epox( to produce a composite with a densit( of 1644 9g'm!, <f 27449g'm! and <m 1244 9g'm!. !. =escribe s stress tress strain relations relations for a lamina of arbit arbitrar( rar( orientation. %. Explain the elasticit( approach to to )nd four elastic elastic moduli moduli.. 7. Explain 8oo9 8oo9e:s e:s law for a two#dimensional unidir unidirectional ectional lamina? UNIT – III PART – B
1. Explain > >sai#8ill sai#8ill failure theor( used used for anisotropic materials. 2. What are the t(pes of laminates laminates given below? -ention which elements of 21@,[email protected]
and [email protected]
are Bero for each of them. *1+ C %7 ' C %[email protected]
*2+ !4 ' #%7 ' #!4 ' %[email protected]
*!+ 4 ' D4 ' 4 ' [email protected]
!. =erive the governing d di/erential i/erential e$uation for a laminated unidirectional anisotropic plate. %. &ind the sti/ness sti/ness matrices @, [email protected]
for a three three pl( 4'!4'# 4'!4'# %[email protected]
graphite epox( laminate. ssume each lamina has a
thic9ness of 7mm. >he properties of graphite'epox( graphite'epox( El 131 Ga, Et 14.! Ga, 5lt 4.23 and Glt 6.16 Ga. 7. s(mmet s(mmetric ric angle pl( laminate have the foll following owing data % Fa(ers of each 4.7mm thic9 %7H'#%7H'#%7H'%7H. El 214 Ga, Et 21 Ga, Iit 4.! and Git 6 Ga. ompute the in#plane sti/ness matrix of the laminate. UNIT – IV PART – B
1. 2. !. %. 7.
What are the mat material erials s used for sandwich sandwich construc construction. tion. Explai Explain n basic design conce concept pt of sandwich constructio construction. n. Explai Explain n the two methods of hone( com comb b core manuf manufacturi acturing. ng. Explai Explain n the cell con)gur con)guration ation in hone(comb hone(comb cores? cores? Explai Explain n the hone( hone(comb comb pr process ocesses. es. UNIT – V PART – B
1. 2. !. %. 7.
What are the functions and desirable properties of resins? Explain with neat s9etches s9etches the production production of carbon )bers? )bers? What ar are e the comm commerc ercial ial forms forms of )bers? Explai Explain n open and close closed d mould pr process ocesses es Explai Explain n an( two methods of glass )be )berr manufactu manufacturing ring with
neat s9etch. J. Write shor shortt notes on netting netting anal(sis. anal(sis.