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Support of Impact Testing with Instrumented Target Support by Finite Element Analysis

Ritt, Stefan Andreas and Johnson, Alastair Frank (2008) Support of Impact Testing with Instrumented Target Support by Finite Element Analysis. In: International Conference on Impact Loading of Lightweight Structures. IMPLAST 2008, 2008-06-17 - 2008-06-19, Trondheim, Norway.

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Official URL: http://www.bygg.ntnu.no/ktek/konferanser/SIMLAB2008/

Abstract

High Velocity Impact (HVI) testing is an important issue for aircraft certification. Particularly, bird strike is an impact incident with one of the highest kinetic energy an aircraft can experience. To reduce the cost of extensive gas gun testing for new aircraft structures there is growing interest in finite element (FE) simulations of impact damage. However, HVI simulations are not yet fully accepted by aviation authorities as a means of compliance. In order to validate the computational procedures reliable quantitative data are required from gas gun tests for detailed comparison with FE predictions. In order to prepare and validate expensive and complex experiments, numeric simulations are intended. Hence, FE models of a test setup are defined then used for impact analysis. Emphasis is set on studying the test setup, the structure as well as the model parameters. The test setup is an instrumented target support (ITS) which is designed to measure impact pulses by an internal strain bar. In contrast to surface strain gauge measurements applied on sensitive areas of a structure, the strain gauges are applied to the support bars which guide the impact strain pulses assuming uniaxial wave propagation. Thus, structural deformation is not monitored locally but quantitative measurements of dynamic load pulses acting on structures during gas gun tests are intended. Here, test results of bird pulse measurement with the ITS are evaluated and used to correlate with simulations. The test setup is created as a parametric geometry and impact analysis is performed with LS-DYNA.

Document Type:Conference or Workshop Item (Paper)
Title:Support of Impact Testing with Instrumented Target Support by Finite Element Analysis
Authors:
AuthorsInstitution or Email of Authors
Ritt, Stefan AndreasUNSPECIFIED
Johnson, Alastair FrankUNSPECIFIED
Date:June 2008
Journal or Publication Title:International Conference on Impact Loading of Lightweight Structures
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
Langseth, MagnusUNSPECIFIED
Clausen, Arild H.UNSPECIFIED
Keywords:impact testing, high-velocity impact, HVI, wave propagation, finite element analysis, FEA
Event Title:IMPLAST 2008
Event Location:Trondheim, Norway
Event Type:international Conference
Event Dates:2008-06-17 - 2008-06-19
Organizer:Structural Impact Laboratory (SIMLab), Faculty for Engineering Science and Technology, NTNU Trondheim, Norway
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Stefan Andreas Ritt
Deposited On:14 Jan 2009
Last Modified:15 Jan 2010 00:39

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