Elliya, Inc., provides detailed engineering and analysis services for today's highly technical industries.  Beyond classic analytical techniques, our experience in engineering analysis incorporates many fields in both linear and nonlinear Finite Element Analysis (FEA).  From large steam turbine rotors to miniature medical implants, we provide accurate solutions to engineering problems in a timely and cost efficient manner.

Linear Analysis

Elliya performs concurrent linear analyses to supplement our clients' design and production efforts.  We work with clients to establish models and verification tests that reflect the real world system in question.  Linear models provide the most cost-effective insight into the behavior of your system.  Elliya uses existing 2D or 3D geometry from a variety of design software platforms, and can create new models when necessary.

Modal (Natural Frequency) / Pre-Stress Modal 

 Natural frequency pertains to the vibration frequencies which a part or assembly is sensitive to, much like the opera singer who breaks the wine glass using the vibration of his or her voice, products subject to vibration can catastrophically fail because they are being vibrated at their natural frequencies. DesignSpace can identify by mode shape number or frequency range the critical vibration ranges. If the assembly or part is under load DesignSpace will automatically determine the above information in the stressed state.

Nonlinear Analysis

Elliya's capabilities include the more difficult area of nonlinear and transient analysis.  Many engineering problems exhibit nonlinear behavior that cannot be accurately simulated by a simple linear model.  These problems typically include nonlinear materials such as rubber, plastics, and composites, large deformations, creep, multiple body contacts, transient loads, and boundary conditions.  Proper iteration control techniques and convergence criteria must be established to ensure accurate results and efficient solution response times.

Thermal / Thermal-Stress

If you are designing products subject to heat or heat combined with structural loads, DesignSpace can determine how heat flows through the parts or assembly, what the temperatures are internal to the parts, where the heat dissipates from as well as the effects of prescribed heat flows.

Temperature Dependent Convection 

This is also known as nonlinear convection. This allows you to have a convection coefficient "h"  that changes with temperature allowing more accurate thermal simulation where the flow of some media over a surface of a part or assembly is either adding or subtracting thermal energy.

Temperature Dependent Thermal Conductivity 

This is also known as a nonlinear temperature property and allows the material property "coefficient of thermal conductivity" to change with temperature. The instantaneous temperature of a material determines the rate it will conduct heat with any incremental temperature changes. DesignSpace will iteratively solve this by taking into account the possible changes in conductivity properties as they relate to temperature.

Topological Optimization 

Elliya offers design optimization through methods using FEA and automated geometry/constraint software. When designing how do you know where you can remove material and not adversely effect your design's structural, thermal, or frequency requirements? DesignSpace Shape Optimization allows you to load and support your geometry and request an amount(%) of material to be removed.  DesignSpace will then determine the load and support paths for the part or assembly and graphically  show you where you can remove weight.

Solution Verification and Validation

Verification of FEA solutions against classical analytical calculations is a core philosophy in Elliya's analysis services.  We calibrate our models against available empirical test data, simplified models, and classical calculations to ensure required solution accuracy.


 



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