Tech Guy Posted October 4, 2021 Share Posted October 4, 2021 What is the equation to find the bouncing height of a cylindrical tube when the flat surface is falling on the floor under earth's gravity? I know the mass, drop height and material properties of the cylindrical tube. Link to comment Share on other sites More sharing options...
studiot Posted October 4, 2021 Share Posted October 4, 2021 2 minutes ago, Tech Guy said: What is the equation to find the bouncing height of a cylindrical tube when the flat surface is falling on the floor under earth's gravity? I know the mass, drop height and material properties of the cylindrical tube. Depends upon if you are considering an elastic or inelastic impact ? Link to comment Share on other sites More sharing options...
Tech Guy Posted October 4, 2021 Author Share Posted October 4, 2021 Considering it as an elastic impact. Material of the tube is high-density polyethylene. Density 960 kg/m3, Tensile modulus 1500MPa Tensile strength at yield 31 MPa Charpy Imp strength 4.0 kJ/m2 And considering tube is falling to a concrete floor Link to comment Share on other sites More sharing options...
studiot Posted October 4, 2021 Share Posted October 4, 2021 (edited) 33 minutes ago, Tech Guy said: Considering it as an elastic impact. Material of the tube is high-density polyethylene. Density 960 kg/m3, Tensile modulus 1500MPa Tensile strength at yield 31 MPa Charpy Imp strength 4.0 kJ/m2 And considering tube is falling to a concrete floor OK so you need the coefficient of restitution. This pdf is an advanced treatment, but includes explanation of the basics. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.402.4689&rep=rep1&type=pdf Note the poly tube will be in compression not tension at impact. Edited October 4, 2021 by studiot Link to comment Share on other sites More sharing options...
swansont Posted October 4, 2021 Share Posted October 4, 2021 6 hours ago, Tech Guy said: Considering it as an elastic impact. Material of the tube is high-density polyethylene. Density 960 kg/m3, Tensile modulus 1500MPa Tensile strength at yield 31 MPa Charpy Imp strength 4.0 kJ/m2 And considering tube is falling to a concrete floor If it's elastic it will rise to its initial height, unless there is rotation imparted to it. It's the inelastic collision that requires more information and analysis. 1 Link to comment Share on other sites More sharing options...
studiot Posted October 4, 2021 Share Posted October 4, 2021 2 hours ago, swansont said: If it's elastic it will rise to its initial height, unless there is rotation imparted to it. It's the inelastic collision that requires more information and analysis. I think I need a holiday. First class catch, I misread the reply. + 1 😳 Link to comment Share on other sites More sharing options...
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