Abderrahmane Sahraoui is a British aerospace stress engineer working for Flight Structures. He has a B.Eng in Aerospace Engineering from Queen Mary, University of London. At Flight Structures, he performs stress analysis on the Rolls Royce Trent 700 thrust reverser unit for the Airbus A330, including projects validating cooling duct modifications, assessing the impact of beam cracking, and evaluating a proposed material change for the front frame.

1. Abderrahmane Sahraoui
Aerospace Stress Engineer
Address: Flat 9, 66 North Birkbeck Road, Nationality: British
London, E11 4JQ DoB: 23/06/1989
Phone: 07539 300 146 Email: a.sahraoui@hotmail.com
Qualification: B Eng (Hons) Aerospace Engineering
PERSONAL PROFILE
I am a qualified aerospace engineer working in an aerospace consultancy firm as a stress engineer. I
work on the development of the Rolls Royce Trent 700 Reverse Thrust Unit of the Airbus A330
aircraft.
WORK EXPERIENCE
Jun 2013 - Present Flight Structures (Stress Engineer)
I currently work for Flight Structures, an aerospace design, analysis and management consultancy
firm. I support the in-service engineering department for SAFRAN Aircelle on the Rolls Royce
Trent 700 Thrust Reverser Unit. The in-service department is responsible for investigating failures
and faults identified by the Airlines that have an effect on the safety and reliability of the aircrafts.
We prepare a number of stress analysis reports to support airworthiness safety assessment, root
cause analysis, allowable damage limits, repair validation and if necessary design modifications.
Some of the projects I have worked on:
External Cooling Mod Validation: Due to high temperatures from the jet engine, it was identified that
the hot air vented at the lower nacelle was reattaching to the structure and causing the lower beam to
overheat. A cooling duct using air from the bypass duct was designed and I produced a detailed fine
mesh model of the duct to analyse the stress concentrations of features such as the cooling. As part of
the fem work, I validated the quality of the model by examining parameters such as load balance,
element boundaries and mesh quality. I also stressed the interface joint with the nacelle using hand
calculation to analyse the bearing and pull through of the composite panel, aluminium beam and
titanium duct as well as fastener tension and shear strengths.
Beam Cracking Impact: Due to cracking in a segment of the beam, a static and fatigue analysis was
carried out to assess the impact on the safety margins and design life goal for the metallic beam and
surrounding composite structure. The project involved modifying the certification global FEM to
include the crack. Interface loads were extracted from output file and used for:
• Static analysis of the joint of the adjacent beam flange to the composite outer nacelle and z-
stiffener
• Fatigue analysis of the beam flange joint using the bearing and bypass loads and the NIU
stress severity factor approach
• The max and min principal strains to compare against damage tolerance composite allowable.
• Hoffman/Tsai-Hill ply and bond failure indices of the composite plies

2. • Determine the margins of the latch and latch back up structure using the load increase factors
on the latches
Front Frame Material Assessment: A proposal was made to investigate whether aluminium plate
material can be used instead of die forging for the front frame as a means to reduce costs. I was tasked
with assessing whether this was structurally possible. I modified the certification FEM to input the
young’s modulus and poisons ratio of the new material. I extracted the loads and repeated the
certification calculations of the frame to produce the new set of stress margins and fatigue life for the
plate material.
IFS misaligned fastener holes – concession report: I supported the manufacturing engineering
department with a task of analysing the repair for the misaligned fastener holes. The solution was to
drill bigger holes and insert bushes in order to realign the fastener holes. I prepared the stress report
considering the knockdown factor for the reduced edge distance. Failure indices of the composites of
the joint were analysed using the increased stress concentration for the larger holes.
All our stress reports are delivered to Rolls Royce and then to Airbus for validation and I have had to
rework and up-issue some of the above reports to address the comments raised by the customers. Our
reports are produced in accordance with the ISO 9001 Quality process which requires all of the inputs,
including material properties, loads and analysis methods, are approved for use on the project. All
files need to be stored in specific version controlled directories for traceability and all reference data
used are stored and available in case of an audit.
Nov 2011- May 2013 House of Fraser (Stock Handler)
EDUCATION
QUEEN MARY, UNIVERSITY OF LONDON Sep 2007 – Jun 2010
B.Eng. Aerospace Engineering – 2nd
Class (Honours) Degree
SIR GEORGE MONOUX COLLEGE Sep 2005 – Jun 2007
A-Levels in 3 subjects – Mathematics, Further Mathematics, Physics
NORLINGTON, SCHOOL FOR BOYS Sep 2000 – Jun 2005
GCSE's (A*
-C) in 9 subjects including Mathematics and English
SKILLS
• Analytical / Problem solving: university degree and work experiences (in particular in my
role at Flight Structures – stress analysis)
• Leadership/Management: group projects during my university degree and work experience
as group leader within stock handling team
• Languages: English (Fluent), French (Intermediate), and Arabic (Native)
• Software packages: Microsoft Office, Catia V5, Patran/Nastran, AutoCAD and ABAQUS
• Full Driving License

3. Referees Available Upon Request