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  1. DON54660

    Shear in thin metal sheets

    Thanks, I'm working on a reply and a new sketch to see if I understand completely what has been said. Don
  2. DON54660

    Shear in thin metal sheets

    Hello, I have two questions A.Where are the greatest amount of stress in a thin panel under a sideway load? B.What formula is used to calculate that stress? Here is a rough sketch I have prepared of what I think is happening. http://www.tomah.com/delliott/shear1.jpg Detail 'A' give the size...
  3. DON54660

    Stress for tubing

    To LCubed and Bradh, as that was my first posting on Eng-tips I didn't know where to put my question, so I posted in groups that seemed to relate to the question. As far as what happen with the thread. I contacted admin. and they said they have no idea what happened and said they don't delete...
  4. DON54660

    Stress for tubing

    Thanks that is reassuring as ADK post said I incorrectly used Moment of Inertia instead of the Section Modulus. I wrote this reply to his post but as you have noticed it is gone. For the records here was the post I prepared to ADK post in reply. LCubed, please correct me if my thinking is...
  5. DON54660

    Stress for tubing

    Thank you, Is the following correct? A chinning bar (tube) is supported at each end at a distance of 72 inches (resting on its edges) and an 85 pounds load is placed exactly at the center of this bar. The chinning bar is actually a tube supporting this load and is 1x1x.062wall, a hollow square...
  6. DON54660

    Stress for tubing

    Thanks all, I am not making anything, I am trying to understand some things about tube stress and design. Here is a sketch I made of a space frame that uses the tube I have questioned. http://www.tomah.com/delliott/seven15.jpg Later I shall post a calculation I made for bending to see if I have...
  7. DON54660

    Stress for tubing

    Hello Lcubed, Actually two seperate references (Books) The first is: 1.Machinery's Handbook H.Rourge Chapter title section is 'Strength of Materials'. It was given in a chart called Stresses at yield point of different materials. examples A. Machine steel...tensile 47,000 shearing 30,000 lb...
  8. DON54660

    Stress for tubing

    Thank you for responding, I am aware of a safety factor. My concern is in one reference book it list 22,000 for tube (Mild steel) and another for tensile and compression 65,000 psi for mild steel??? or am I missing something. This is for general construction and they do list a safety factor for...
  9. DON54660

    Stress for tubing

    For mild thin wall steel tube 1 inch by 1 inch by .062 What would be the allowable stress 65,000 or 22,000 psi? Tensile, compression and bending? Thanks Don

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