1. Initial temperature in the entire system is 20 °C. If the system is heated up to at which temperature to copper and aluminum rods do not exceed safety limits? 0.2 mm d Cu 400 mm AI D 300 mm Al :D-50 mm E=70 GPa a-23.106 [1/°C] Gallowable 50 MPa Cu: d-40 mm E-100 GPa a-27.10 [1/C] Gallowable 100 MPa
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- 2:45 ull 4G A moodle1.du.edu.om 1- A J-Type thermocouple referenced to 80°F has a measured output emf of 2.878 mV. What is the temperature of the measuring junction? 2- Assume that the measured temperature is 250° F, what should be the output voltage if the reference temperature is 90 °F. RK: if the temperature values are not in the table, you have to use interpolation. Response to question 2: The measured output voltage (mV) Select one: O a. 2.764 b. 4.769 c. 5.762 O d. 3.768mathlab code: %Press-Fit Example Problem 117 %Steel, psi ES=30*10^6 MuS=0.292; %Cast Iron EC=14.5*10^6; MuC=0.211; di=0; d0=2.002; Di=2.000; D0=3.000; % tolerance tol=d0-D0; % Pressure Eq. (3-56) R=Di/2; r0=D0/2; ri=di/2; Hub=(1/ES)*((r0^2+R^2)/(r0^2-R^2)+MuS); Inner=(1/EC)*((R^2+ri^2)/(R^2-ri^2)-MuC); p=tol/(R*(Hub+Inner))SN = 9 X = 20 please answer part d,e,f,g
- P1=10KN P2=10KN P3=10KN. thermodynamics- A platinum resistance thermometer has a resistance of 5 ohm at 0°C and 2.5 ohm at 100°C Calculate the temperature when the resistance indicated is 10 ohm.Rigid bar ABC is supported by two identical solid bronze [oy = 331 MPa; E = 105 GPa; a = 22.0 x 10-6/°C] rods and a single solid steel [oy= 250 MPa; E = 200 GPa; a = 11.7x10-6/°C] rod. Bronze rods (1) each have diameters of d₁ = 17 mm and lengths of L₁ = 3.8 m. Steel rod (2) has a length of L₂ = 5.1 m. (a) Calculate the diameter d₂ required for steel rod (2) so that the deflection of joint B is zero for any change in temperature. (b) Using the value of d₂ determined in part (a), determine the maximum temperature decrease that is allowable for this assembly if a factor of safety of 2.3 is specified for the normal stress in each rod. Since the temperature is decreasing, the answer should be negative. (1) (1) L₁ A Answer: (a) d₂ = i (b) AT = i a (2) B a L2 mm °℃
- QUESTION 2 ' а) Besides temperature measurement that is based on thermal expansion, there are also thermal sensors that are based on other factors. i. Describe on how the RTD and thermistor measure the temperature and difference between them. ii. Given the temperature for RTD in Figure 1 is 155°C, coefficient of resistance for RTD, a is 0.0035°C'' and resistance for the RTD is 352 at 0°C. The bridge is operated in a balanced condition. Find the value of R1, if R2= R3. R3 R2 G RTD RRTD Ri E, Figure 1 Wheatstone Bridge3. Microfluidic channels will need to be fabricated on a key micro-scale sensor used by aerospace industries. Before running machining tests and analyzing machined quality, preliminary efforts are needed to evaluate selected materials and factors affecting machining process¹. Three material candidates have been selected, including 422SS (stainless steel), IN718 (nickel alloy), and Ti64 (titanium alloy) with their measured tensile properties and equation of true stress-true strain relationship used listed below. Tref25°C. Specifically, three factors will need to be evaluated, including different materials, temperature, and size effect. Please calculate true stress values for true strain ranging between 0-3 for each case listed below. Material A (MPa) & (S-¹) Tm (°C) 870 0.01 1520 422SS (Peyre et al., 2007) IN718 (Kobayashi et al., 2008) Ti64 (Umbrello, 2008) 980 1 1300 782.7 1E-5 1660 Material 422SS (CINDAS, 2011) IN718 (Davis, 1997) Ti64 (Fukuhara and Sanpei, 1993) 0 = X G (GPa) 1+ B…Referring to the figure shown below, water contained in a piston-cylinder assembly, initially at 1.5 bar and a quality of 20%, is heated at constant pressure until the piston hits the stops. Heating then continues until the water is saturated vapor. The initial height, L₁, is 0.05 m and the change in height, L2, is 0.03 m. For the overall process of the water, evaluate the work and heat transfer, each in kJ/kg. Kinetic and potential effects are negligible. For the overall process of the water, evaluate the work, in kJ/kg. For the overall process of the water, evaluate the heat transfer, in kJ/kg.
- ۱۰:۱۳ docs.google.com * Fixed-Fixed bar was 20 centigrade degree at room temperature, Determine the thermal stress when the bar is heated to :110 degree A Lo Est = 200 Gpa = 11.7 μm/m°C ας ast Ast = 200 mm² _187.2 MPa (compression) +187.2 MPa (compression) 210.6 MPa (compression) 210.6 MPa (Tension) + 210.6 MPa (compression) + 210.6 MPa (Tension) +187.2 MPa (Tension) O non of these _187.2 MPa (Tension) (A steel pipe has an inside diameter of d = 350 mm and an outside diameter of D = 158 mm. The length of the pipe is L = 5.0 m. The changes in dimension caused by an increase in temperature of 80°C for the: Outside diameter __ mm Inside diameter __ mm Lenght __ mm 3 decimal places standard coefficient of thermal expansion: steel - 11.25x10^-6 / degrees celcius Aluminum - 23x10^-6 / degrees celciusWhat is the maximum applied force, F, if each member can support a max. tensile force of 10 kN and a max. comp. force of 2 kN? C 3 m 3 m tan(0) 3 > 0 = 31° %3D 5 m 5 m F [Ans. :Max. force is 1.2 kN. Member BD is the critical member (in compression).]