Compare the use of a low-strength, ductile material (1018 CD) in which the stress-concentration factor can be ignored to a high-
strength but more brittle material (4140 Q&T at 400°F) in which the stress-concentration factor should be included. Given: Fy = 175 lb, Fx = 87.5 lb, and Fz = 131.25 lb.
1 answer:
Answer:
Step 1 of 3
Case A:
AISI 1018 CD steel,
Fillet radius at wall=0.1 in,
Diameter of bar
From table deterministic ASTM minimum tensile and yield strengths for some hot rolled and cold drawn steels for 1018 CD steel
Tensile strength
Yield strength
The cross section at A experiences maximum bending moment at wall and constant torsion throughout the length. Due to reasonably high length to diameter ratio transverse shear will be very small compared to bending and torsion.
At the critical stress elements on the top and bottom surfaces transverse shear is zero
Explanation:
See the next steps in the attached image
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<h2>Answer:</h2>
Rate of discharge in cumecs: <u>0.0048m³/s</u>.
Velocity flow: <u>24m/s</u>.
<h2>Explanation:</h2><h3>1. Find the rate of discharge in cumecs.</h3>
a. Convert from litres to m³.
120L*1000= 120000mL
120000mL=120000cm³
120000cm³/100³=0.12 m³.
b. Rate of discharge.
<em>If 0.12 m³ where discharged in 25 seconds, the rate of discharge is:</em>
0.12m³/25s = 0.0048m³/s.
<em />
<em />
<h3>2. Find the velocity flow.</h3>Let's refer to the fluid mechanics equation that relates volume flow, area and velocity. This is the formula:
; where the expression
is the volume flow rate (in m³/s); A is the cross-sectional area of the pipe (in m²), and v is the velocity flow (in m/s).
a. Solve the equation for v.
b. Calculate the cross-sectional area of the pipe.
<em>The cross-sectional area of the pipe is a circle. Hence, the formula of this area is:</em>
<em>We'll have to convert the diameter to meters, because the formula for flow velocity needs the area in m². Let's go ahead and do that.</em>
<em />.
<em>We were given the diameter, and the formula uses the radius, but the radius is just half of the diameter, therefore, we can substitute in toe formula like this:</em>
c. Substitute in the new expression for velocity flow and calculate.