Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: jpaero
  • Content: Threads
  • Order by date
  1. jpaero

    Re-framed- Skin shear flow with ribs

    At the outset, this question in some fashion is a follow-up of my previous question but I feel is worth asking as a separate one. Let us say I have a wingbox as shown below subjected to pure torsion at one end and cantilevered at the other. I understand that I can calculate the shear flow as...
  2. jpaero

    Skin shear re-distribution

    I have a structure similar to the one shown below. The structure was originally analyzed using FEA with Rib(A) present. Due to some issue, we need to ignore the presence of Rib (A). We are not in a position to re-run the FEM. We have the panel shear flows for each of the panels based on the...
  3. jpaero

    Cut-out reinforcement design drivers

    Would anyone know what drives the design of cut-out reinforcements? For eg: how do I go about designing a pax door cut-out surround? What would my design drivers be? I can think of the skin stress being a limiting parameter. But are there any other? Also, if you are doing an initial sizing...
  4. jpaero

    de Havilland Comet Design changes

    I am trying to learn the specific design related issues with the de Havilland Comet. I have read the investigation report which spoke of: 1. Underestimation of stresses at the corners 2. Overloading the fatigue specimen before the fatigue test itself 3. Testing only the fwd fuse and effect of...
  5. jpaero

    Fatigue load spectrum

    Background: I am involved in a fatigue life extension project of an aircraft. The initial fatigue life of the aircraft was determined using a theoretical load spectrum of 10,000 FC. And now we want to evaluate the actual fatigue life consumed. So we are going to perform a few flights (in line...
  6. jpaero

    Standards for Sailplanes (I4-FVK/91)

    Does anyone have a copy of OR know how to find the following document? "I4-FVK/91 Standards for Structural Substantiation of Sailplane and Powered Sailplane Components Consisting of Glass or Carbon Fiber Reinforced Plastics” - LBA July 1991" It should be a public paper of the German Civil...
  7. jpaero

    Bearing-Bypass Basics

    I have been trying develop some intuition when it comes to bearing-bypass interaction in composites. I would like to see a comparison of bearing+bypass stress distribution for metals vs that for laminates. Just to make it simpler for understanding, I was hoping to see the plots if the laminate...
  8. jpaero

    Bearing-Bypass Interaction Basics

    I have been trying develop some intuition when it comes to bearing-bypass interaction in composites. I would like to see a comparison of bearing+bypass stress distribution for metals vs that for laminates. Just to make it simpler for understanding, I was hoping to see the plots if the laminate...
  9. jpaero

    Stress Intensity vs Stress Concentration?

    I have been trying to sort of distinguish between stress concentration factors and stress intensity factors. I have managed to write a bit. Stress concentration factor tells you by what factor the local stress is higher than the far field/reference stress. It is purely a geometry driven...

Part and Inventory Search

Back
Top