Virtual prototyping of drop test using explicit analysis

Abstract

Abstract. Increased requirements for reliability and safety, included in contemporary standards and norms, has high impact over new product development. New numerical techniques based on virtual prototyping technology, facilitates imrpoving product development cycle, resutling in reduced time/money spent for this stage as well as increased knowledge about certain failure mechanism. So called "drop test" became nearly a "must" step in development of any human operated product. This study aims to demonstrate dynamic behaviour assessment of a structure under impact loads, based on virtual prototyping using a typical nonlinear analysis -explicit dynamics. An example is presneted, based on a plastic container that is used as cartridge for a dispenser machine exposed to various work conditions. Different drop orientations were analyzed and critical load cases and design weaknesses have been found. Several design modifications have been proposed, based on detailed analyses results review.

Hardness comparison between Co – Cr metal alloy specimens made by different methods

“…Milling consists of removing material until the intended shape is reached. The process needs continuous cooling of the material because the temperature on the material`s surface is increased [1]. The additive technologies are another production method used in the CAD/CAM technologies.…”

“…The laser beam draws the desired shape, the excess material is removed and another layer of the powder is added. This process continues until the construction becomes ready [1].…”

FEM analysis on collapse of UAV from different heights

“…Drop tests have been studied, but in other areas, not in the analysis of the framework of a UAV. Drop tests are for studying falling of different fruits and vegetables [19; 20], for different objects like test boards, pen drive, air conditioner, cartridge and dishwasher [21][22][23][24][25], or other studies of drop tests in the field of aviation, but not UAVs [26; 27].…”