Nader Sadaghdar **** OAK street, UPLAND, CA *****

nsadaghdar @aol.com • Cellular 909-***-**** • Home 909-***-****

Aerospace Mechanical and Structural Engineering

Executive Summary

• Registered Mechanical Engineer (PE) with 16+ years in aerospace stress analysis.

Stress and fatigue analyses of primary and secondary airframe structure of metallic and composite construction. Classical hand calculation methods (Stress justification, stiffness, strength, stability, joints & fasteners checks) and FEA for military and commercial aircrafts.

Prepared stress reports for static and fatigue substantiation per FAR 25 for airplane certification.

Responsible for systems design, engineering material selection and writing technical reports.

Inertia and aerodynamic loads calculation of external mount reconnaissance and fuel pods.

Proficient Finite Element Analysis (ANSYS Mechanical Workbench, NASTRAN & PATRAN), Mathcad, CATIA V5, UG (NX) and data software (Excel, Access, Words).

Education

University of Bridgeport, Bridgeport, Connecticut

M.S. Mechanical Engineer 1982

B.S. Mechanical Engineer 1980

Licenses

Professional Mechanical Engineering License. From California Board for Professional Engineers and Land Surveyors. P.E. License No. M 27538

Core Skills & Trainings

Project Management. MS Office (Word, Excel, Power Point). Lean tools and methods.

Finite Element Analysis: NASTRAN, PATRAN, ANSYS Work Bench for static, dynamics, fatigue, buckling, frequency response, DaDt, UNIX, SAP, CATIA V5, UNIGRAPHICS/ NX, Composites, and Sheet Metal Design, Castings, Extrusions, ISO 9001, ISO 9002, ASTM, ASME specifications. GD&T, ASME Y14.5M-1994. AutoCAD/ Mechanical Desktop, Inventor, Mathcad, MRB, Team Center.

Professional History

Rockwell Collins Electro-Mechanical Systems-Irvine, CA 11/2012 to 29/4/2016

Stress Analyst

As Butler contractor supported Systems group in new development programs like airplane Pilot Controls, Rudder/ Brake, and Trim Horizontal Stabilizer Actuation for strength, fatigue and endurance of Airbus A350. Became focal in Margin Expansion, leading cost reduction effort of 787 Control Modules. Performed strength substantiation, linear and non-linear analysis, using ANSYS workbench, Mathcad and Excel for A350 Rudder Brake and 787 and 777X Pilot Control Systems. Wrote the stress reports and supported cost reduction, PDR and CDR for FAA certification efforts. Calculation of damage index due to High Level Short Duration (HLSD) loading of electro-mechanical actuation.

UTC (Formerly Goodrich Aero structures), Chula Vista, CA, 91910 2006 to 10/2012

Stress Engineer IV

Structural static, dynamic and fatigue analyses of Composite/ Metallic nacelle components, leveraging hand calculation (Mathcad and Excel), and Nastran/ Patran FEA. Supported the completion of C-5 EBU and pylon, 737 NG inlet cow and 787 thrust reverser Strength reports.

Achieved business plan of cost and weight reduction through alternate material selection and design simplification.

On time delivery of non-conforming through MRB disposition of 160+ parts for 787 and C-5 airplanes. Provides sustaining analyses for product enhancement and resolving production issues.

Completed the strength substantiation reports for the Supplemental Type Certification (STC) of the Boeing 707-300 re-engine kit consisting of: inlet, EBU, thrust reverser, exhaust nozzle, and strut systems per FAR 25 & 33 requirements.

Developed FEM for a new product (Translating Inlet) validated the model by Modal analysis.

Supported the 787 Nacelles Static Strength and Damage Tolerance reports for Certification.

Performed DaDt analysis for C-5 pylon and CFM56 engine mount (primary structure).

Boeing Commercial Aircraft in Long Beach, Ca. 2005

Stress Analyst

As Triad Systems International contractor was assigned to Boeing to perform hand calculation for strength substantiation of reworked parts, antenna displacement, and interior using classical methods. Performed Durability and Damage Tolerance analyses of 747SF fuselage and 767 wings to determine the residual strength, crack growth and fatigue life prediction per Boeing’s design manuals and software’s.

Rapiscan Security Products, Hawthorne, CA 90250 1998 to 2005

Sr. Mechanical Engineer

Lead the mechanical development a new product (Fixed Site Large Cargo X-Ray Inspection System). Used AutoCAD, Inventor and SolidWorks extensively to design the Mechanical/ Structural system components including: castings, structural steel collimators, positioning mechanisms, frames, electronics enclosure, lifting and mounting fixtures. Prepared proposal and made concept drawings for modification of heavy duty truck with articulated boom and van for Mobile X-ray units.

Originated designs and developed steel structures and layouts for security systems.

Took ownership of manufacturing tasks for vendor selection, fabrication, and procurement.

Water Resources Industries, Overseas 1991 to 1998

Mechanical Engineer

Built and lead an engineering team which was responsible to design, develop and validate hydro- electro mechanical products.

Made standards for feasibility studies prepared proposals for new projects.

Lead the team from design to shop fabrication of a pump station and distribution.

Managed hydro mechanical projects for design, fabrication, installation, equipment selection and creating procurement documents technical illustration and installation manual.

Sargent-Fletcher Company, El Monte, CA, 91731 1985 to 1991

Stress Engineer

Introduced ANSYS FEA for the first time. Increased in house capability for modal, dynamics and acoustic analyses, reducing out sourcing and analysis time. Responsible for using both ANSYS finite elements and classical methods for Ultimate strength and fatigue substantiation of aircraft structure.

Prepared formal loads, stress, buckling, modal analyses and test reports of external mounted electronics pods, fuel tank refueling pod.

Prepared detailed structural/dynamic analyses, mass properties, inertias and aerodynamic loads reports for military aircrafts (Harrier, F-15, F-16, F-18, C130 and 707).

Lead all phases of functional testing, including writing test plan, calculating static test loads, specifying fixtures and hydraulic jacks. Personally mounted strain gages, collected data, and interpreted results. Provided oversight in the conduct of vibration and acoustic tests.

Salsbury Industries, Los Angeles, CA 1984 to 1985

Project Engineer

With limited direction had considerable latitude to finish the design and validation of clutch-brake mechanism. Lead machine shop production. Wrote standard work for CNC programming. Made significant Reduction on vibrations of automatic torque converter for Club Cars.

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