{"id":186377,"date":"2021-07-24T19:02:40","date_gmt":"2021-07-24T19:02:40","guid":{"rendered":"\/forum\/forums\/reply\/186377\/"},"modified":"2021-07-24T19:11:17","modified_gmt":"2021-07-24T19:11:17","slug":"186377","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/186377\/","title":{"rendered":"Reply To: Action &#8211; Reaction Force"},"content":{"rendered":"<p>When designing an energy absorbing system, start by defining the kinetic energy (KE) before impact.  <br \/>\nKE = 1\/2*mass*(impact_velocity)^2<br \/>\nWhat is the mass of the moving object? What is the impact velocity?<br \/>\nAt the end of the event, do you want the moving object to elastically rebound off the structure with the same velocity it came in with, or do you want the structure to crumple\/crush to absorb all the KE so that the moving mass comes to rest? Or you can have some rebound and some crumpling\/crushing.<br \/>\nDepending on your answer to that question, there are different designs of energy absorbing systems.<br \/>\nAlso, you should reply to the email sent to confirm your email address so that you have the full functionality of the site.<\/p>\n","protected":false},"template":"","class_list":["post-186377","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"When designing an energy absorbing system, start by defining the kinetic energy (KE) before impact. KE = 1\/2*mass*(impact_velocity)^2 What is the mass of the moving object? What is the impact velocity? At the end of the event, do you want the moving object to elastically rebound off the structure with the same velocity it came\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/186377\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Action \u2013 Reaction Force | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"When designing an energy absorbing system, start by defining the kinetic energy (KE) before impact. KE = 1\/2*mass*(impact_velocity)^2 What is the mass of the moving object? What is the impact velocity? 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