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Ch3_Problems

# Ch3_Problems - until the strccts in thc specimen rcached...

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HW# I Machine De.sign I l. A 60 mm thick Aluminum 7075-T6 flat plate (properties are given in Table A-22) is rolled to makc a cylindcr with an inner radius of l00mm. Assuming that the mid-plane of the platc docs not cxpcrience any tcnsion or compression (i.e." there is no clongation at the mid-plane). Determinc if the plate will fracture during rolling. M1!L:Li_!_)A = 0-2? zl (rto) (-ro. a.6h- A-2 Z,lk /rac&rc l4rqiA y'or A17075'T/' €+=O.18 o.23 > o tg ) -tk phl< uill

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a) 2. The strcss-strain diagraln for some material is shown in thc figure. A tensilc tcst spccimen having a diamcter of 0.5
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Unformatted text preview: until the strccts in thc specimen rcached 74ksi then the specimen was unloaded. a) Find thc ncw length ofthc specimen. b) lf thc spccimen u'as rcloadcd again until the stress reached 60ksi, what would be thc lcngth of thc spccimen a1 this stress lcvel'l o l f i \ 1 1 \ { ) l 7/r -' lnl l a{). 0'011- / ' J - l G r = u - : - - / 4 - 0 . 0 5 1 L lhto 1 b , , . , C k r v l ( = O . 1 2 € r = € - € r . O . l 7 Nzv la"gth = t,( t+ ( \ E a O h ( ; = 2 o " ' ' -))r50 K si b) € =ae * d - o o €- 4.o51 = o.069 = 5 ( l * o A b t ) = 5 . J h 5 l h--6 ) + 9 Y - = u ' l t /l] 5o t t / t . z \ = 5 ( t . o t t ) t L = L o t t ? \ -- . / - ' ' .- L. L1 -1 Jt) i 1 ) i n r l . 0 ; I , t 1 , l 1 { l...
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Ch3_Problems - until the strccts in thc specimen rcached...

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