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Clean Sky 2 Deliverable D1.4.1.3-12 - Impact test and design update finalized

Ritt, Stefan Andreas and Schröder, Andreas (2021) Clean Sky 2 Deliverable D1.4.1.3-12 - Impact test and design update finalized. Project Report. 26 S.

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Abstract

The report summarises the design update realised on a reduced size leading edge demonstrator segment. This segment represents the dimensions of a horizontal stabiliser leading edge at outer span width of a long range aircraft. The given segment includes an HLFC technology by a multi-chambered suction system with a micro-perforated outer skin. The design update was performed in terms of composite layup and manufacturing plus assembly with the micro-perforated titanium skin. The design and manufacturing processes were accompanied by numerical simulation with respect to impact and was concluded with an impact test similar to airworthiness regulations. The key objectives are to decrease the manufacturing time of all steps and to create an impact validation data base for the complex material set-up for HLFC. In order to improve the aero industry applicability of HLFC, the improved leading edge design was scrutinised with a relevant impact load case. Based on the certification specification along the FAA for passenger transport aircraft, the impact velocity and bird weight were chosen. This requirement was chosen since it exceeds the EASA with respect to the stabilisers. The demonstrator segment had a reduced size compared to a full leading edge segment, however it represented more than two rib bays. All constituents of the reduced size demonstrator as well as the artificial bird were modelled and calibrated in detail within numerical simulation but only reduced characterisation data for the materials were applied. The sensitivities were studied and the final impact test prepared. The post-test simulation was used to account for the impact test conditions in terms of precise attitude and speed of the impactor.

Item URL in elib:https://elib.dlr.de/147620/
Document Type:Monograph (Project Report)
Title:Clean Sky 2 Deliverable D1.4.1.3-12 - Impact test and design update finalized
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ritt, Stefan Andreasstefan-andreas.ritt (at) dlr.dehttps://orcid.org/0000-0002-5330-509X
Schröder, AndreasA.Schroeder (at) dlr.deUNSPECIFIED
Date:9 December 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:26
Status:Published
Keywords:HLFC, composite, manufacturing, soft body impact, impact tolerance, safety bird strike
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Braunschweig , Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Institute of Composite Structures and Adaptive Systems > Composite Technology
Deposited By: Ritt, Stefan Andreas
Deposited On:11 Jan 2022 14:42
Last Modified:11 Jan 2022 14:42

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