CE335_PRM_LAB5

Figure 1 shows the tensile testing results for different materials. All specimens have an initial diameter of 12 mm and an initial gauge length of 50 mm. 300 250 Low carbon steel Network polymer 200 Crystalline polymer 150 Amorphous polymer 100 50 5 10 15 20 25 30 Strain (%) Figure 1: Stress-strain curve b. Determine the following parameters for each material: • the tensile strength the 0.2% offset yield strength the modulus of elasticity • the ductility Stress (MPa) LO

Viscosity (Pa-s) 400 1016 1014 1012 1010 108 105 104 10² 1 200 800 Borosilicate glass Temperature (°F) 1200 1600 2000 96% silica glass Working range Melting point 400 600 Fused silica 2400 2800 3:200 Strain point Annealing point Softening point Working point Soda-lime glass 1018 1016 1014 1012 1010 108 106 104 10² 800 1000 1200 1400 1600 1800 Temperature (°C) Viscosity (P)

You have been given the following test sample data following mechanical testing of 15 test pieces of Silicon Nitride. What is the Weibull modulus of this material? Would you advise the use of a similar material with a Weibull Modulus of 16.3 and a mean failure stress of 485 MPa, if you anticipate that the peak stress on the material could be 430 MPa? Sample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Select one or more: O a. No O b. 18.6 O C. 13.4 O d. Yes O e. 15.7 f. 17.1 Failure Stress (MPa) 423 459 496 432 447 467 473 499 485 479 505 530 526 490 510 <

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Review Data taken from a stress-strain test for a ceramic are given in the table. The curve is linear between the origin and the first point. No elements selected a(ksi) 50 + 40 - 30 Figure 1 of 1 20 10 + o (ksi) € (in./in.) ex 10(in./in.) 0.5 1.0 1.5 2.0 2.5 33.2 0.0006 45.5 0.0010 Press (ENTER) to select this element. Press ESC) to return to the main menu. Press CTRL+Q) to quit the application. 49.4 0.0014 51.5 0.0018 53.4 0.0022

You have been given the following test sample data following mechanical testing of 15 test pieces of a modified Alumina. What is the Weibull modulus of this material? Would you advise the use of this material over one with a Weibull Modulus of 19.6 and a mean failure stress of 270 MPa, if you anticipate that the peak stress on the material could be 255 MPa? Sample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Select one or more: a. 185 b. No Yes □d. 49 □e. 28.6 3.7 Failure Stress (MPa) 297 293 270 300 g. 22.8 260 296 265 295 280 288 263 290 298 275

UzNDU3NTYyMjk0/a/MjYOMzAwMjMOOTM5/details Further questions 4.The graphs show how the extension changes with stretching force for four different materials. a. Which two graphs show materials that follow Hooke's law? A B b. Which two graphs show materials that become less stiff as they are stretched? force force D C. Which graph shows a material that maintains the same stiffness throughout? force force 1. A force of 20N stretches a spring by 0.5m. The spring obeys Hooke's law. a. Calculate the spring constant including a suitable unit. b. How much force must a man use to stretch it by 1.5m? 5. A car has a weight of 240OON which is distributed equally over all four wheels. Each wheel has a spring of spring constant 400N/cm. a. Determine the force through the spring on each wheel. b. Calculate the compression of each spring when the car rests on the ground. 6.In a spring experiment the results were as follows: Force (N) Length (mpm 1 2 4 6. 7 50 58 70 74 82 9n 102 125 LELL

Flag question You have been given the following test sample data following mechanical testing of 15 test pieces of a modified Alumina. What is the Weibull modulus of this material? Would you advise the use of this material over one with a Weibull Modulus of 19.6 and a mean failure stress of 270 MPa, if you anticipate that the peak stress on the material could be 255 MPa? Sample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Select one or more: Failure Stress (MPa) 297 293 270 300 260 286 265 295 4 293 280 288 263 290 298 275

For my assigment, I was asked to design a electric motorbike that has a peformance equal to Honda CBR1000 Fireblade which has a petrol engine. A part of the the assignment is to calculate " An estimate of maximum Power your new motor will need to generate to match the Honda’s performance." I can make the assumption, apart from changing the motor, everything else is going to stay the same so the fairing,the rider and etc they're gonna be the same for the two bikes. So can you please tell me how I can calculate that which information would I need ?

Im not sure how ro go about this, can you help me figure out these answers or how to get these answers?

Test Specimen 4140 CF steel 6061 T6 Al Gray Cast iron 40 FC Brass 360 Impact Energy (J or ft-lb) 48.5 ft-lb 25 ft-lb 12 ft-lb 27 ft-lb Impact Strength (J/m or ft-lb/in) 123.096 ft-lb/in 63.452 ft-lb/in What is the final analysis/ overall observation from the data? 30.457 ft-lb/in 68.528 ft-lb/in

Question 8. The following figure represents three hardness-testing techniques of materials. Describe their specifications, how there are conducted and their potential applications? 8 - Shape of Indentation Test Indenter Side View Top View Load Brinell 10-mm sphere P of steel or tungsten carbide Vickers Diamond 136° microhardness ругamid Rockwell and 60 kg) 100 kg } Rockwell 150 kg) Diamond 120° superficial cone: s - in.- diameter Rockwell 15 kg 30 kg } Superficial Rockwell 45 kg) steel spheres

Results: material iron brass aluminum copper NH VINI Discussion: vickers hardnes test Load(kg) 50 50 30 30 Diameter of trace d1 d2 0.58 0.65 0.68 0.74 0.94 0.86 0.72 0.76 d1+d2 2 VHN Kg/mm² 1- Calculate the Vickers hardness number for the previous samples and compare the results and discuss them according to the table. 2- Draw a graphic relationship between the diameter of the trace and the hardness of Vickers. 3- What is the condition for using the Vickers hardness device?

Select All the correct statements from below.  a. If the averaged distance between partial dislocations for material A observed under TEM is smaller than material B, the estimated stacking fault energy of material A is lower than material B. b. K_IC is a material property that doesn't change with testing conditions c. The main difference between high cycle fatigue and low cycle fatigue is the difference in the number of cycles to failure d. A negative R value in fatigue test indicate the minimum stress is compressive in nature

Mild steel 1 Young;s modulus 1219.5 Yield strain and stress (0.4101,500.08) Failure stress and strain :not able to find because the given data shows the experiment did not reach the failure point.  if the material stress and strain does not reach a failure point ,what dose it means , does it means that the material is more stronger?

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Need help with this Mechanics of Materials review