[해법] 기계재료학 (공업재료) 3판(Engineering Materials 1, Ashby 출판사 BH)
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Download : [솔루션] 기계재료학 (공업재료) 3.pdf
SOLUTIONS MANUAL
(up to 25 years) may be needed to find a replacement.
certain specific uses, most elements are not easily replaced. Examples: tungsten
many applications, substitutes are easily found at small penalty of cost. But in
Examples: aluminium for copper as a conductor; reinforced concrete for wood,
2 Solutions Manual: Engineering Materials I
ln
but development time is again important.
2.1. (a) For commodity A Pt = CA exp
CB
= 100
Recycling
100
순서
(아래는 해결책 표지 부분과 2장의 일부 연습문제 부분입니다. 수식이 가미되어있으므로 텍스트상에서는 이렇게 출력될 수 밖에 없음을 이해해주시고 책 확인후 결정 해주세요^^)
Qt are the values at t = t . Equating and solving for t gives
(b) The doubling time, tD, is calculated by setting Ct = t = 2C0, giving
doubling times as 35, 23 and 18 years respectively.
in cutting tools and lighting (a fluorescent tube contains more tungsten, as
t
An Introduction to Properties, Applications
100
rB
t
(c) Using the equation of Answer (a) we find that aluminium overtakes steel
Substitution
설명
![[솔루션] 기계재료학 (공업재료) 3-2312_01_.gif](http://www.happyreport.co.kr/prev/201112/%5B%EC%86%94%EB%A3%A8%EC%85%98%5D%20%EA%B8%B0%EA%B3%84%EC%9E%AC%EB%A3%8C%ED%95%99%20(%EA%B3%B5%EC%97%85%EC%9E%AC%EB%A3%8C)%203-2312_01_.gif)
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![[솔루션] 기계재료학 (공업재료) 3-2312_05_.gif](http://www.happyreport.co.kr/prev/201112/%5B%EC%86%94%EB%A3%A8%EC%85%98%5D%20%EA%B8%B0%EA%B3%84%EC%9E%AC%EB%A3%8C%ED%95%99%20(%EA%B3%B5%EC%97%85%EC%9E%AC%EB%A3%8C)%203-2312_05_.gif)
where CA and CB are the current rates of consumption t = t0 and Pt and
레포트 > 공학,기술계열
rB
tD
r
2.2. Principal conservation measures (see Section 2.7):
CA
The fraction of material recycled is obviously important. Products may be
Substitution of the values given for r in the table into this equation gives the
of surface coatings to prevent metal loss by corrosion (e.g. in motor cars).
기계, 공학, 과학, 연습문제, 솔루션, 재료
r
re-designed to make recycling easier, and new recycling processes developed,
More Economic Design
a starter filament, than an incandescent bulb!); lead in lead-acid batteries;
−rA
and for commodity B Qt = CB exp
and Design, 3rd edn
Solutions to Examples
t = 100
[해법] 기계재료학 (공업재료) 3판(Engineering Materials 1, Ashby 출판사 BH)
Engineering Materials I
rA
by building large plant (economy of scale); using high-strength materials; use
ln 2 ≈ 70
platinum as a catalyst in chemical processing; etc. A long development time
Download : [솔루션] 기계재료학 (공업재료) 3.pdf( 48 )
stone or cast-iron in construction; plastics for glass or metals as containers. For
in 201 years; polymers overtake steel in 55 years.
Design to use proportionally smaller amounts of scarce materials, for example,
1
다.
