Tensile Definition and 160 Threads

  1. 1

    Compressive and Tensile Stresses of an 'I' Beam

    Homework Statement A symmetric I section beam is 60 mm deep with a second moment of area of 663x10-9 m^4 and a cross sectional area of 1600 mm^2. It is subject to a bending moment of 1.2 kN.m and an axial force of 25 kN (tension). Find the maximum tensile and compressive stresses.Homework...
  2. P

    Finding flexural compressive stress and tensile stress

    How would I use a shear force diagram and a bending moment diagram to find the maximum flexural compressive stress and the maximum flexural tensile stress? I am assuming the peaks at the bending moment diagram is the maximum tensile and compressive stresses? Am I correct? Also, is it...
  3. S

    Tensile Testing (Determining Young's Modulus)

    Question: Why is it not sensible to calculate the Young's modulus of the material (steel) when the experiments was conducted? But I thought it should be possible to calculate the Young's modulus after plotting the stress/strain curve. Young's modulus can be found by finding the gradient of...
  4. H

    Obtaining compressive and tensile stresses in beams

    Homework Statement In calculating stresses, how do we determine when we have a negative in front of the question and when we do not have it. I am really confused, meaning I have not understood the concept, but the examples I am looking at some have got σ= My/I whilst others have σ= -My/I...
  5. C

    Tensile Testing - Material Failure Prediction

    Hi all, This is not really a homework problem, more of a 'what-if' scenario but I'm not sure which section to put it in. For a science project we have been asked to look at material properites and come up with a project (which will have a presentation :eek: but that's another story). I'm looking...
  6. M

    How Thick Should Spiderman's Silk Be to Support His Weight?

    Homework Statement In the course of the above research, they discovered that this spider silk has an ultimate strength #or tensile strength of 1850mPa (see 11.4 in University Physics). Tensile stress is a measure of the pressure in an object when it is stretched. Tensile strength is the...
  7. H

    Finding the tensile modulus E11

    Hey guys, Really basic question, how do I find the tensile modulus E11 from a set of data? Let the data be: stress(GPa) 0.050 0.300 0.454 0.800 strain(mm/mm) 0.002 0.0025 0.004 0.0087 I know how to find young modulus E=strain / stress When finding E...
  8. G

    Difference between Tensile Force and Tension

    What is the difference? If I recall someone telling me there's no sense thing as a force called tension and that the proper term is tensile force but it's all fuzzy at the moment. Does anyone know the difference between the two and can explain? Thanks, in advance
  9. R

    Calculate Cross Section Area of Steel Rod for 3 Tonne Tension

    Homework Statement A medium carbon annealed steel rod has a rectangular cross section and must cope with a tension of 3 tonnes. The thickness of the rod is 15mm. Calculate the size of the cross section. Homework Equations ? The only formula I know with CSA and force is: stress = Force...
  10. I

    Keel design, high tensile steel elongation

    To simplify things, I have assumed the keel section is a rectangle and not a foil. (Also, these specs are taken from an existing design.) dimensions: keel 38cm (width/chord) X 3.8cm (height/thick), length 1.64m, bulb 445Kg Using beamboy, (cantilever with weight at end) the deflection is:-...
  11. E

    Tensile Strength and Tensile Strain

    Are these two things the same? I'm looking at bioabsorbable copolymers with similar properties to the human acetabular labrum, but I can only find tensile strength values for the copolymers and tensile stress at break for the labrum. I've looked at the definitions of each it sounds like the...
  12. A

    Tensile Tests Load-Extension into Stress-Strain

    Homework Statement Via tensile testing of various materials I have been supplied with Load-Extension tables. I must calculate and show the Strain-Stress Graph. I know from this it is fairly easy to calculate the stress by force/area. What I am having trouble with is strain. I have a...
  13. N

    Ansys Tensile Test: Troubleshooting Elongation

    I am trying to create a model in ansys for a composite coupon with a width of .5", height of 9", and thickness of .16". I have input my own material library file with my material data and I am having trouble getting the model to thin at the middle like a tensile specimine would normally do. I...
  14. D

    Maximum tensile and compressive bending stresses in a beam

    Homework Statement Draw the shear force and bending moment diagrams for the beam shown in Fig. 1 below. Determine the maximum tensile and compressive bending stresses and the positions at which they occur. The beam’s cross-sectional area is shown in Fig. 2...
  15. I

    Problem about tensile stress during thermal contraction

    Hi I am trying to solve this problem. I will present my solution though I couldn't get the tension right. At 40 Celsius , there is no tension in the wire. When the wires are cooled , they contract and the tension increases. But the tensile stress, which is force per unit area, will remain...
  16. R

    Calculating Tensile Stress in a 40mm Rod with 200 KN Load | Formulas & Solutions

    Homework Statement Calculate the tensile stress in a rod 40 mm in diameter with a load 200 KN ? Homework Equations pi*r^2 The Attempt at a Solution 3.14 * (20*20) = 1256 mm^2 200 * 1000 = 200 000 N 200 000 / 1256 = 159.24 N/mm^2 Tensile stress = 159.24 N/mm^2...
  17. P

    Finding Normal Compressive & Tensile Stress: a Example

    Homework Statement [PLAIN]http://img12.imageshack.us/img12/6109/17007711.jpg The attempt at a solution For part (a), I can only find a normal compressive stress. It is as follows: \sigma_{c} = \frac{F}{A} \sigma_{c} = \frac{100*9.81}{\pi(0.013)^{2}} \sigma_{c} = 1847704 Pa...
  18. B

    Tensile fcorces, AHU suspended by 2 cables

    I have uploaded an image. I just need some one to help me start this problem. I cannot find any similar examples in my book. I have drawn an FBD. I feel like it has something to do with components but can't figure out where to start. Do I need to rearrange the forces in the FBD or...
  19. T

    Ballistics, hydrodynamics - tensile cavitation in tissue and fluids

    I have made decent progress with my ballistics model, but I have run into trouble and I'm not quite sure how to solve it. This particular problem deals with penetration and tensile cavitation. Based on the Held equation for cavitation in jet penetration (still haven't found any sites discussing...
  20. J

    Finding the new diameter of a metal rod after tensile loading

    Homework Statement A metal rod with a 0.5 inch diameter is subjected to a 2000 lb tensile load. Calculate the resulting diameter of the rod after loading. Assume that the modulus of elasticity is 10,000,000 psi, Poisson's ratio is 0.33, and the yield strength is 21,000 psi. Homework...
  21. A

    How Do You Calculate Tensile Load from Stress and Strain?

    Question: A beam is givn with an axial strain of 500x10^-6 and a Young's modulus of 200GNm^-2. work out the magnitude of the tenslie load. Rlelvnt equations: σ = YM x Axial strain My workng: So far I have worked out the stress of the beam to be: 36000000Nm^2 36MNm^2 But from...
  22. GRB 080319B

    Clear Box Tape Tensile Strength

    Why does clear tape (used to tape up cardboard boxes) become increasingly harder to tear along the axis that it is stretched? It seems that after a certain amount of deformation, it becomes nearly impossible to tear. This seems to be different then just the restoring force (as opposed to...
  23. B

    Relation between tensile strenght and young's modulus

    Hi friends, My work is related to simulation of the practical testing processes to the software testing methodologies using CAE :cool: In short, I have an assembly(3d model or CAD data) for which I have to simulate the practical testing process to the software testing and compare the...
  24. N

    Compression or Tensile on Fiberglass

    Homework Statement A piece of aluminum as shown in the picture is applying a compressive force on the fiberglass material. I need to know if the loading material will exceed the specification of the fiberglass material. Homework Equations Properties of fiberglass Tensile...
  25. A

    Where does the tensile strength locate?

    Hi, i read my online note, it state that yield strength is stress at which noticeable plastic deformation has occurred but why when i see the graph, it doesn't means like what it written. below is the graph make me confusing.
  26. H

    Tensile Test vs. Bending Test Stresses

    This is more of a theoretical question. Not sure if this should be under this section or Mechanical Engineering. Homework Statement For 1018 steel, I tested the UTS to be about 83 ksi for a dogbone specimen with a circular cross-section. However, when I determined the Ultimate Bending...
  27. A

    Stress strain and tensile strength diagram

    why does stress decrease after it reaches its maximum tensile strength after its plastic range ?
  28. T

    Calculating the Tensile Strain of a Glass Rod

    Homework Statement If a glass rod of diameter 1cm is loaded with a 1kN tensile load and has a young's modulus of 70 GPa, what is the tensile strain? Homework Equations The Attempt at a Solution Im sure if somebody could tell me the formula for this i could work it out easily
  29. T

    High tensile strength plastic pipes

    Hey all, I'm trying to make a cylindrical bonded magnet, but I need to compress it in a non magnetizable pipe capable up withstanding up to 10000 psi pressure, 1 cm or less in diameter. PVC only has a tensile rating of 7500 psi so it won't do. i would like to know what plastic(or any non...
  30. O

    Calculate Tensile Stress with Strain Gauge

    A strain gauge has a unstrained resistance of 120 ohms, gauge factor of 2.0 is connected to steel girder so it experieces tensile stress. If strained resistance of gauge is 120.13 ohm. How do i calculate the tensile stress value? I have looked all over the internet for equations relating but...
  31. O

    Calculating Tensile Stress Using a Strain Gauge

    A strain gauge has a unstrained resistance of 120 ohms, gauge factor of 2.0 is connected to steel girder so it experieces tensile stress. If strained resistance of gauge is 120.13 ohm. How do i calculate the tensile stress value?
  32. K

    Which Direction Does the Force of Tension Act in a Hanging Rope?

    Hello again PF, I have some questions I have been wondering about. First of all, if you have a situation like this where a weight is hanging from a taut rope, which direction would the force of tension be in? http://img217.imageshack.us/img217/4074/tensionforce.jpg The way I understand...
  33. H

    Measuring Elastic Modulus of Materials in Tensile Testing

    What could you do to obtain a more precise measure of the elastic modulus of a material in tensile testing?
  34. J

    Converting some data from a tensile testing device

    ok the device used is called a “Instron” electromechanical testing machine. not sure if anyone is familiar with this, but that isn't the real point. ok, so an aluminum beam, dimensions: "ext. gauge length: 4in" "Spec. gauge length: 2in" "thickness: 0.037in" "width: 0.5in" now, the...
  35. R

    Testing Pine Needle Packaging Material: Methodology and Errors

    For our thesis, my friends and I made a pine needle packaging material made of brown pine needle bits about 1 inch in length and cornstarch paste. We attempted to get its Young's modulus to determine its tensile and compressive strength. This is how we did our experimentation: The packaging...
  36. R

    Finding Tensile Force in Pulley Problem

    Homework Statement See Picture, The problem gives three boxes(M1, M2, and M3) and a few pulleys, no value for the coefficient of friction is given. None of the masses are known, and we are told to assume M1 and M3 are sliding. The objective is to find Ft (if you can't see that well...
  37. A

    Mechanics Problems: Tensile Forces and Pressure

    Homework Statement A uniform, horizontal beam of length 4 weighs 150 N. It is connected to a wall by a hinge and is held horizontal by a cable of length 5; it holds a 300 N weight at its end away from the wall. The cable and the beam form a 3:4:5 triangle with the wall. Homework Equations...
  38. G

    What Is the Ultimate Tensile Stress of Rubber?

    Homework Statement How would you define the ultimate tensile stress of rubber? Homework Equations If I had a force/extension graph of rubber, what point in the graph would show me the value of the ultimate tensile stress?? The Attempt at a Solution Is it the same thing as ultimate...
  39. C

    Optimizing Silk Strand Diameter for Maximum Tensile Strength

    Is there a way to turn this tensile strength into maximum tension which is in Newtons?
  40. V

    Yield Point and Temparature relationship of High Tensile Steel

    I have a steel material that has a yield strength of 515 mpa and a tensile strength of 615 mpa at zero degrees. What i need to know is will the tensile strength and yield strength be higher than 293 mpa at 80 degrees. The steel is ahigh tensile grade steel from china (Q390C).
  41. B

    Formula for the tensile stress on a spinning ring

    I'm having a problem finding and equation that will give me the tensile stress acting on a spinning ring, like the rim of a flywheel, that is trying to "pull itself apart". The ring has no spokes or disc, but is just a ring spinning on its axis. I need to know how fast the ring can spin...
  42. M

    How Can I Design a Micro-Tensile Tester for Human Hair?

    looking to design and hopefully build a micro-tensile tester to test the properties of human hair. as part of my uni class I need to design the grippers involved and have a look at non contact extensiometers. Could anyone point me in the right direction with some links or books? or even...
  43. L

    Determining Tensile Stress on Pressurized Sphere Skin

    how to determine the tensile stress placed on the skin of a pressurized sphere
  44. P

    Calculating Ultimate Tensile Strength from Stress-Strain Curve

    Homework Statement What is the ultimate tensile strength if necking begins at a true strain = 0.25 in a material whose stress strain curve obeys the relation: sigma=120000(epsilon)^1/2 psi? Homework Equations The Attempt at a Solution I'm kind of stumped on this. I really...
  45. C

    Measure the tensile strength using Young’s Modulus

    Hi there, I am currently looking to measure the tensile strength using Young’s Modulus for steel and brass. My results I have obtained are comparable with published values of E. My question is regarding the formulae, the one I used was: E = F/x X l/a Where a is the original cross section...
  46. R

    Difference between tensile and yield strength of a metal

    Homework Statement differance between tensile and yield strength. please help. Homework Equations The Attempt at a Solution
  47. E

    Calculate Stress & Strain from Lab Results for Steel

    How would i calculate the stress and strain with the results from a lab below: Steel’s original diameter: 8.00 mm Steel’s original length: 49.96 mm Steel’s final diameter: 4.64 mm Steel’s final length: 63.17 mm Steel’s maximum load force: 26.43 kN I also have an MS Excel table of time, laser...
  48. L

    Tensile Strength of 4 square RV Bumper

    Tensile Strength of 4" square RV Bumper I'm building a Class II style hitch for mounting on a 4" square RV Bumper. The RV bumper wall thickness is around .090 thousands. The bumper is welded perpendicular to a couple box frames on 60" centers. I intend to mount the hitch directly to the center...
  49. H

    What is the Tensile Stress, Strain, and Young's Modulus of a Stretched Wire?

    Homework Statement A load of 172 kg is supported by a wire of length 2.07m and cross-sectional area .143cm^2. The wire is stretched by 0.149 cm. Find tensile stress, strain, and Young's modulus. Homework Equations stress= F/A strain= ∆L/L E= stress/strain The Attempt at a...
  50. R

    Stress at half of tensile strength

    Can you guys solve a debate for me?If you have two objects and apply a physical stress to them, let's say in the forum of pressure. First object: Tensile strength 400 lbs. and you apply 200 lbs Second object: Tensile strength 200 lbs and you apply 100 lbs. So each is under 1/2 it's tensile...
Back
Top