Material mechanics Definition and 15 Threads

  1. A

    I How much energy is needed to blow up stone (and other materials)?

    So I am trying to find the amount of energy needed to break apart stone into different sized chunks (when either punching it or blowing it up) and I'm using this method to estimate it: Assume the object got broken up into cubes of the desired diameter Find the surface area of all the cubes...
  2. siuolleboss479

    I Presentation of the Dehavilland Comet crash due to metal fatigue

    Hi, I need some help, I want to do a presentation of the Dehavilland Comet crash due to metal fatigue and want explain what caused this with a Paris law equation. So I watched this video: https://shorturl.at/xlUp4 The goal is to find the number of cycles that the fuselage went through during its...
  3. TitaniumVCarbon

    Are there any materials immune to the type of mass loss the IPK had

    The IPK gradually lost microscopic amounts of mass despite not being of a weak material and being far from the platinum alloy’s (it is made of a platinum-iridium alloy) failure point. Why does this happen and what materials are immune to this? Is it only materials that are made of pure elements...
  4. M

    Force Calculation for bending of TOR steel bars

    Hello everyone, I need some help to calculate the force required to bend a tor steel bar of dia 20mm and 12 m long from the centre. I want to bend it like a hair pin and need to know how much force is exactly required to do so. Any help or resource would be great. Regards, Mradul
  5. T

    Solving Beam Deflection with Singularity Equations

    Homework Statement Homework Equations Singularity equations for beam deflection $$\sum M_B=0=-M_0-R_AL-M_0$$ $$R_A=-\frac{2M_0}{L}$$ The Attempt at a Solution I know how to use singularity equations and all that but my problem is calculating the force especially when moment is involved. For...
  6. mkematt96

    Linear Abrasion Testing PVC/Polymer Blend Hoses

    Working on a research project to develop a test standard for abrasion testing pressure washer hoses. Ideally this could be used on any sort of hose. We have a set procedure that has worked on a couple hoses that looks like this: .Weight applied is constant .Cycle speed is constant .Constant...
  7. mkematt96

    Dynamic Shear Force on a Brake Pad

    I'm looking for a way to calculate the shear force applied to a brake pad from stopping ( a small engine brake pad stopping a fly wheel). I know shear stress is shear stress/ area , would this apply for a dynamic application as well? Would I need to calculate the force to stop the flywheel at a...
  8. Atom

    What is the stress and pressure in a thin-walled cylinder?

    Homework Statement Homework EquationsThe Attempt at a Solution a) stressc = 3.1 x 109 (5655*10^(-6) + 0.471 (-2663*10^-6) = 17.53Mpa P = [17.53 x 10^6 x (7.7 / 1000) ] / (150 / 1000) = 899 947pa = 899.947kPa
  9. P

    How Does a Perpendicular Force Affect a Fixed Elastic Rod?

    I am studying the following phenomenon for my project: Thin horizontal elastic rod is fixed at both ends and small perpendicular force is applied at middle of the rod perpendicular to its length. I want to study this dynamics and extend it to cylindrical shell. Please suggest books/papers or...
  10. A

    Shoulders on railway tracks concrete sleepers

    Hi, I want to ask the shoulders that are used on railway tracks concrete sleepers, should they be forged or ductile cast and why? If someone can post an article it'll be great. Thank You for your help and support.
  11. A

    Shock absorption properties better from casting or forging?

    Hi I want to ask which of the cast steels or forged steels provide with better shock absorption? The component has to be used in the under chassis of heavy trucks in bumpy roads. Can anyone help me with that? Thank You
  12. ltkach2015

    Resolved Shear Stress Compared w/ Shear Stress-Contradictioni

    TERMS: Slip Plane: is the plane that has the densest atomic packing—that is, has the greatest planar density. Slip Direction: corresponds to the direction in this plane that is most closely packed with atoms—that is, has the highest linear density. TEXTBOOK: Materials Science and Engineering...
  13. H

    How to Select a Lightweight Material for a Tricycle Chassis?

    I am working on a project for which we have to design a Light weight tricycle. I want to know the procedure for selecting a light weight material for the chassis, which has good stiffness, economically available and good weld ability. We also have no constraints on the cross section of the pipes...
  14. Shaker1

    Where Can I Find Detailed Information About the Manufacturers of Belgian RPVs?

    Anyone given thought to the mechanism(s) of the cracks in the Belgian RPVs? In normal circumstances, I personally have clues based upon experience. The material neutron bombarded for a number of years gives that all a twist. So...Anybody?
  15. T

    Calculating Steel Rod Life with 8000 psi at 1000 °F

    1. Problem statement A steel rod supporting a stress of 8000 psi at 1000 ◦ F is not to exceed 5 % creep strain. Knowing that the steady-state creep rate can be expressed by an equation of the form ##\dot{\epsilon}_{s}^{C}=B|\sigma |^{n} exp \left(\frac{-Q}{kT} \right)## ε⋅, strain rate B...
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