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CRAHVI D 3.2.4: Stochastic methodology for hail and stone impact

Johnson, A. (2003) CRAHVI D 3.2.4: Stochastic methodology for hail and stone impact. Project Report, DLR-Interner Bericht. 435-2003/27.

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Abstract

This report describes a methodology developed for stochastic impact simulations with ice (hailstone) and stone (concrete, runway debris) on the composite HTP. A previous report D3.1.8 discussed a deterministic model for stone and ice impact, which is used here as the basis for stochastic impact simulations. This showed that impact damage is very localised, requiring a fine FE model of the impact region, so that attention is restricted to a vulnerable element in the HTP which is the sandwich stiffened LE shell between 2 ribs. The stochastic tool in PAM-OPT is used to investigate the influence of composites properties and impact conditions on simulated impact damage in a CFRP/honeycomb sandwich with carbon fabric/epoxy skins. In this report a stochastic methodology is defined with PAM-OPT and demonstrated by investigating damage from a rigid impactor. It is shown how a stochastic analysis may be used to define limiting conditions for panel damage when impactors will just penetrate the sandwich skin. In further work a second report D3.3.2 considers the stochastic analysis of wider range of impact scenarios and discusses the design implications for sandwich panels in aircraft structures.

Document Type:Monograph (Project Report, DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=2004,
Title:CRAHVI D 3.2.4: Stochastic methodology for hail and stone impact
Authors:
AuthorsInstitution or Email of Authors
Johnson, A.UNSPECIFIED
Date:2003
Status:Published
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):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 13:13

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