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역학적 성질을 예측할 수 있다.
4)역학적 성질을 예측할 수 있다.
2.시험용 기구
1)시멘트 및 표준모래
2)저울
3)표준체 : 841𝜇(No.20),595𝜇(No.30)
4)메스 실린더 : 용량 150~200cc
5)인장시험용 몰드
6)인장시험기 : 하중속도 270±10k
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재료
최대 측정무게 2kg 해상도 10mg 전자저울 1대, 면 수건 1개, 금속 막대의 열팽창실험과 선팽창계수 측정실험 1세트, 주사기 20ml, 주사기 50ml, 고무 밴드, 압력 센서, Labpro 1세트, 온도 프로브 2개, PC 1개, Logger Pro 3 1 copy, 수증기통과 지지대 1세
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C., : Electrochemistry Principles & Applications , Cleaver -Hume Press Ltd, London, 1961.
3. Devereaux, O. F. : Topics in Metallurgical Thermodynamics, John Wiley & Sons, New York, Chapter,1983.
4. Guggenheim, E. Thermodynamics, 5th edition, North- Holland, Amsterdam,1967.
5. Pourbaix,M. : Atlas of
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역학적 성질을 예측할 수 있다.
2.시험용 기구
1)압축시험기: 유압형, 스크류형
2)혼합기, 혼합용기 및 패들
3)저울(칭량 2kg, 감량 1g의 것)
4)메스 실린더 : 250cc, 500cc
5)고무제 스크레이퍼
6)표준체: 297ɥ(No.50), 595ɥ(No.30)
7)온도계,
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C
P1
dAB
dBC
P2
P1 2500 lb
dAB 1.25 in.
dBC 2.25 in.
(a) NORMAL STRESS IN PART AB
(b) LOAD P2 FOR EQUAL STRESSES
AB 2040 psi
Solve for P2: P2 5600 lb —
sBC
P1P2
ABC
2500 lbP2
4
(2.25 in.)2
sAB
P1
AAB
2500 lb
4
(1.25 in.)2 2040 psi—
ALTERNA
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C
P1
dAB
dBC
P2
P1 2500 lb
dAB 1.25 in.
dBC 2.25 in.
(a) NORMAL STRESS IN PART AB
(b) LOAD P2 FOR EQUAL STRESSES
AB 2040 psi
Solve for P2: P2 5600 lb —
sBC
P1P2
ABC
2500 lbP2
4
(2.25 in.)2
sAB
P1
AAB
2500 lb
4
(1.25 in.)2 2040 psi—
ALTERNA
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Solution 4.3-12 Beam with trapezoidal load
266 CHAPTER 4 Shear Forces and Bending Moments
Reactions
RA 65kN
RB 55kN
RARB12 (50 30 kNm) (3 m) 0 kNm
©FVERT 0
c
(20 kNm)(3 m)(12)(2 m) 0
©MB0 RA(3 m) (30 kNm)(3 m)(1.5 m)
Free-body diagram of section CB
Point
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psi
NOTE: Within the accuracy of the calculations, the
maximum shear stresses are the same.
tmax
V
8Itw
(bh 2
2 bh 1
2 twh 1
2 )
I
1
12
(892.51 in.4) 74.376 in.4
I
1
12
(bh 2
3 bh 1
3 twh 1
3 )
b
z h
y
C
tf
tf
tw
b
z h1 h h2
y
C
tf
tf
tw
Probs. 6.8-3 and 6.
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C B
M0
L
u
0
L length of 90º bend
L 46 ft552 in.
d 4.5 in.
L
2r
4
r
2
Assume that the deflection curve is nearly flat.
Then the distance BC is the same as the length L
of the beam.
arcsin 0.02 0.02 rad
(1 cos ) (75 m)(1 cos (0.02 rad))
15.
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L carries a vertical concentrated load P acting through the centroid C at
the midpoint of the span (see figure). The beam is attached to supports
inclined at an angle to the horizontal.
Determine the orientation of the neutral axis and calculate the
maximum stresses at the outside corners of t
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