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Page 1: ) s o t z - abl.gtu.edu.trabl.gtu.edu.tr/hebe/AblDrive/68431132/w/Storage/101_2010_2_321... · a) Ca lc u la te the c r itic a l r e s o lv e d s he a r s tr e s s in ta c r ys ta

N a m e 2 0 2 0 1 5

M SE 32 1 M ID T ERM 5 P r o bl e m s 90 M i n u t e s

1) I f lo a d p i s a p p l i e d i n y d i r e c t i o n,

d e f i n e p o i s s o n 's R a t i o v i n t e r r r 1s o f E . .

¬ y · ¬ z

t w l æ «. . < r c A i I I·

· ï c u n

.h

) =

) j

Page 2: ) s o t z - abl.gtu.edu.trabl.gtu.edu.tr/hebe/AblDrive/68431132/w/Storage/101_2010_2_321... · a) Ca lc u la te the c r itic a l r e s o lv e d s he a r s tr e s s in ta c r ys ta

2 ) U s in g t he a t t a c h e d s t r e s s s t r a in c u r v e fo r b r a s s,

de t e r m in e t h e f o l lo w i n g

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a ) C a l c u l a t e t he c r i t i c a l r e s o l v e d s h e a r s t r e s s i n a c r y s t a l i f a s t r e s s o f 17 o [M p a ] a p p l ie d i n

the [ l 0 0 ] d i r e c t i o n is r e q u i r e d t o m o v e a d is l o c a t io n l i n e i n t he [ l t i ] d i r e c t i o n o n t h e

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b) I s th i s c r y s ta l a B C C o r FC C c r y s ta l ? W hy ?

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Page 5: ) s o t z - abl.gtu.edu.trabl.gtu.edu.tr/hebe/AblDrive/68431132/w/Storage/101_2010_2_321... · a) Ca lc u la te the c r itic a l r e s o lv e d s he a r s tr e s s in ta c r ys ta

5) I f a c r y s t a l w i t h a d i s lo c a t io n d e n s i t y o f 109 c m / c m

3 i s d e fo r m e d t o a s h e a r s t r a i n

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w ha t i s t he a v e r a ge d i s t a n c e tha t d i s l o c a t io n s w o u ld m o v e ?I t i s g i v e n t h a t lb l = 2 10 8

c m

$ m

Page 6: ) s o t z - abl.gtu.edu.trabl.gtu.edu.tr/hebe/AblDrive/68431132/w/Storage/101_2010_2_321... · a) Ca lc u la te the c r itic a l r e s o lv e d s he a r s tr e s s in ta c r ys ta