Structural Engineering and Finite Element Analysis Consulting

SDA provides on- and off-site engineering services in support of aircraft and spacecraft design and stress analysis.

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Structural Engineering

Our analyses are rooted in hand analysis and backed by complete models. When necessary, highly detailed models are constructed of specified areas. We have collaborated with an assortment of companies in the aerospace and defense industries. SDA has previously consulted in project design, materials choice, analysis, manufacturing, and testing of aerospace structures. We can tailor your design by cost, strength, weight or any other metric. Our engineers are more than proficient in the use of many relevant engineering software tools to help you achieve your goals, and can turn raw analyses into polished, professional reports quick turn-around.


Strategic use of composites can deliver greater control of your final product’s strength and stiffness. This necessitates a unique engineering perspective due to the high degree of directionality inherent to composites. Many companies tend to shy away from composites for this very reason. Let us leverage our expansive knowledge of composite engineering for your project.

SDA has been designing and analyzing composite structures since it’s inception. Composites are our passion and we enjoy developing new and efficient composite structures. Our experience includes large composite aircraft structures including the B-2 Bomber and F-22 Fighter programs, several space programs, and multiple unmanned air vehicle structures. One of own most renowned composites projects was the NASA commissioned Composite Crew Module. Working as part of a team constructed by the NESC, SDA played a vital role in the design and analysis of this complex structure.

Software we use:

  • Femap
  • NX Nastran
  • Simcenter 3D (NX CAE)
  • Fibersim
  • HyperSizer

We provide the following analysis services:

  • Structure Layout and Design
  • Primary Structure Sizing
  • Structure Layup Schedules
  • Independent Design Review
  • Material Selection
  • Manufacturing Methods
  • Strength Testing Support
  • Interpretation of Results
  • Failure Investigations
  • Analysis Reporting


Basic structural analysis is performed using classical hand analysis supplemented with NASTRAN Finite Element Analysis and Hypersizer Optimization. Finite Element capabilities include:

  • Statics
  • Normal Modes
  • Buckling
  • Geometric Non-Linear (Large Displacement)
  • Material Non-Linear
  • Non-Linear Transient Response
  • Contact Stresses

Want to work together? Let’s talk.