Lateral Crushing Of Circular Ring Tube Under Quasi-Static Loading

• Auteur principal: Al-Khafaji, Omar Abdul Hassan Lafta
• Format: Thèse
• Langue: anglais; anglais
• Publié: UTeM 2016
• Sujets: T Technology (General); TA Engineering (General). Civil engineering (General)
• Accès en ligne: http://eprints.utem.edu.my/id/eprint/18630/; http://library.utem.edu.my:8000/elmu/index.jsp?module=webopac-d&action=fullDisplayRetriever.jsp&szMaterialNo=0000100789; HF5351.M34 2016

Tubular structure is an energy absorption devices which is used to dissipate collision energy through plastic deformation of the structure. Tubular structure saves the occupants of vehicles from lateral collisions by converting the kinetic energy of crash into another form of energy to minimize the impact of accidents toward the occupants. This work presents a study on circular ring/tube under quasi-static lateral loading through experimental, numerical and theoretical tests, with and without side constraints. Mild steel ring/tube with lengths of 10 mm, 35 mm, and 60 mm respectively, with diameter of60 mm and 1.5 mm thickness had been compressed quasi-statically. Instron machine was set to withstand maximum loading of 50 kN. The speed of compression was 5 mm/min. Different constraint angles had been used in this work to study the effect of side constraint on the energy absorption. These angles were varied from (J' to 9(J', with increment 3(J' to examine the effect of the different angle on the energy absorption, collapse load, and specific energy absorption. ABAQUS Finite element analysis (FEA) for the ring/tube had been developed by using Dynamic/explicit code to validate experimental results. Numerical results of energy absorption and collapse load showed a close agreement with the experimental results. Theoretical results were found deviating with the experimental results. Optimum energy absorption experimentally, as well as specific energy absorption, was achieved by using U constraint. Data obtained in this dissertation hoped serve in the design of the energy absorber device in future.