Mark Bertelsen Email and Phone Number
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Lead Stress Engineer / Structural Analyst with 37 years experience in structural analysis of space flight vehicles, aircraft systems, landing gear structure/systems, and rocket engine hardware including the following:• Strong finite element analysis using ANSYS Mechanical, ANSYS Workbench, FEMAP, MSC PATRAN/NASTRAN.• Classical structural analysis support of systems (strength checks of landing gear systems, actuation, pressurized components, weapons deployment, hydraulic fuses, test engineering, MRB, formal stress and fatigue reports, certification).• Supported commercial and military programs working as a direct Boeing employee and also working for 2nd and 3rd tier suppliers to Airbus, Bell, Blue Origin, Boeing, Bombardier, Cessna, Lockheed/Sikorski, McDonnell Douglas, Northrop Grumman, Raytheon, USAF, USM, USN, and Virgin Galactic.• Development/review of stress reports and finite element models to access the airworthiness of space flight test vehicles.• FEM simulations of rocket engine hardware including valves, turbomachinery, manifolds, and thrust chambers.• Classical analysis support using Bannantine/Comer/Handrock (Metal Fatigue), Bruhn, Conway & Currey (Landing Gear), Niu, Peery/Azaar, Peterson, Roark, Shigley• Loads development (internal loads, interface loads, beam element FEM’s. landing gear loads, actuation loads)• Fatigue analysis of metallic structure (stress life methods, Boeing fatigue method, strain-based methods)• Programming Languages (Fortran, Visual Basic, scripting (AWK and UNIX)• Analysis platforms (Mathcad, Excel, Blue Origin analysis platforms, and Boeing analysis software)• Provides guidance/consultation to design engineers, test engineers, stress engineers, and airframe customers.• Supported rapid proposals (RFQ’s, RFP’s, PDR’s, CDR’s, formal reports, and production) including identifying potential weight savings, cost savings, and manufacturing improvements.• Wrote/reviewed/approved structural analysis reports to document compliance with customer specification documents / global aviation regulations / military regulations in support of certification of landing gear structure / systems and hydraulic systems.
Virgin Galactic
View- Website:
- virgingalactic.com
- Employees:
- 987
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Virgin GalacticSelah, Wa, Us -
Senior Stress Engineer - Contractor, Mechanical Systems Stress, Interiors StressVirgin Galactic Nov 2022 - Mar 2024Tustin, Ca, UsSupported the Mechanical Systems Stress group on newest spaceship Delta. Responsible for developing stress schedule, internal loads, interface loads, static analysis, fatigue analysis, and damage tolerance analysis for the Nose Landing Gear.Developed finite element models of the Crew Seat Installation for spaceship Delta supporting the Interiors Stress Group.Worked in the Mechanical Systems Stress group supporting spaceship Unity. Developed loads FEM’s (stick models) for the nose landing gear structure for Spaceship Unity. Reviewed stress reports and finite element models to access the airworthiness of current space flight test vehicles. Worked with a small team of stress analysts in support of continued safe operation of the flight test vehicles. Worked with stress team setting priorities, maintaining schedule and providing guidance on proper analysis methods. Reviewed, updated, and compiled engineering analytical definition of structural components and assemblies based on prototype build projects. Developed standardized analysis criteria and templates. Supported creation of structural test plans to be used to validate manufacturing. -
Senior Structural Analyst - Contractor, EnginesBlue Origin Apr 2022 - Oct 2022Kent, Wa, UsBE-4 Engines - Valves & Integration StressDeveloped Component Finite Element Models based on interaction with the design and engine system analysis team. Ran FEM Simulations of rocket engine hardware including valves, turbomachinery, manifolds, and thrust chambers. Used finite element methods to support test and failure investigations. Provided guidance to design engineers to improve the performance of designs. -
Lead Stress Engineer / Aerospace EngineerTriumph Actuation Systems - Yakima (Tas-Y), A Triumph Group Company Jun 2014 - Apr 2022Radnor , Pa, UsPerformed / directed / reviewed stress and fatigue analyses for commercial and military proposals/programs of landing gear and specialty actuation systems, hold back release bars and fuses. Provided support including classical stress analysis, finite element analysis and fatigue analysis methods. Wrote / checked structural analysis reports to document compliance with customer specification documents / global aviation regulations / military regulations in support of certification of landing gear actuation systems and other TAS-Y systems. Provided structural analysis in support of Test Engineering. Wrotethe Stress Analysis Methods Manual for TAS-Y stress engineers. -
Lead Stress Engineer / Structural Analyst / TechnologistGe Aviation Mar 2006 - Jun 2014Cincinnati, Oh, UsPerformed / review stress and fatigue analyses for commercial and military proposals and programs of landing gear actuators, fuses, and specialty actuation systems. Support includes classical stress analysis, finite element analysis and various fatigue analysis methods. -
Structural Analysis Engineer / ConsultantBertelsen Engineering Services Oct 2004 - Feb 2006Performed structural analysis of landing gear systems components for subtier companies. Support included classical stress analysis, finite element analysis and fatigue analysis.
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Principal Stress EngineerGoodrich Aerospace Sep 1997 - Sep 2004Charlotte, Nc, UsProvided stress support to customers (Boeing, Airbus) using various structural analysis methods and tools (classical strength methods, internal loads analysis, fatigue analysis, and finite element analysis). -
Senior Stress EngineerDowty Aerospace Mar 1996 - Aug 1997Performed strength analysis, fatigue analysis and finite element analysis of hydraulic components (actuators, valves, dampers, hold-back bars, and flow rate fuses).
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Structural Analysis EngineerBoeing Commercial Airplanes Nov 1987 - Feb 1996Arlington, Va, UsWorked in Rention Division landing gear group. Supported the 737 Next Generation program, sustaining programs (707, 727, 737, 757). Worked with industry airframe manufacturers to develop a towbarless towing specification. Supported towbarless towing tests in Europe and provided analysis to correlate test data.Worked in Liaison Engineering Machine Shop and Wing Line Assembly as part of the Structures Engineering new hire program. Received Manufacturing Review Board Authority for resolving discrepancies in manufacturing and assembly.
Mark Bertelsen Skills
Mark Bertelsen Education Details
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Montana State University-BozemanMechanical Engineering
Frequently Asked Questions about Mark Bertelsen
What company does Mark Bertelsen work for?
Mark Bertelsen works for Virgin Galactic
What is Mark Bertelsen's role at the current company?
Mark Bertelsen's current role is Senior Stress Engineer / Structural Analyst.
What is Mark Bertelsen's email address?
Mark Bertelsen's email address is lg****@****ail.com
What is Mark Bertelsen's direct phone number?
Mark Bertelsen's direct phone number is +148096*****
What schools did Mark Bertelsen attend?
Mark Bertelsen attended Montana State University-Bozeman.
What skills is Mark Bertelsen known for?
Mark Bertelsen has skills like Stress Analysis, Aerospace, Finite Element Analysis, Structural Analysis, Nastran, Engineering, Fatigue Analysis, Ansys, Msc.patran, Design Engineering, Catia, Msc Patran.
Who are Mark Bertelsen's colleagues?
Mark Bertelsen's colleagues are Steven Dsouza, Vishnu Gujjar, Thomas Wilkinson, Bryan M., Michael Voldman, Sarah L., Jonathan Digby.
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