Stress prediction in composite part
Enabling & Support

COmposite Space Structures Modelling and Analysis Software (COSSMAS)

03/02/2017 593 views 0 likes
ESA / Enabling & Support / Space Engineering & Technology / Shaping the Future
 Programme:  GSTP  Achieved TRL:  2-3
 Reference:  AO06-21MS  Closure:  2017
 Contractor(s):  SamTEch (BE), Open Engineering (BE), Astrium ST (FR), CRP Henri Tudor (LU)

Composite structures are widely used for space applications due to their strength and their good stiffness to mass ratio. However, the composite materials are more difficult to model and can exhibit various and complicated failure modes.

The main objective of the study is to implement new features in the SAMCEF finite element code used for structural analyses. These features provide significant improvements for the modelling of composite structures and also for the prediction of failure in composite materials.

Sub-modelling of damage in laminate
Sub-modelling of damage in laminate

A new damage law for composite was implemented in SAMCEF. Also a new failure criterion is now available in the software and allows to detect the initiation of the various failure modes. These two developments were tested by Airbus Safran launchers (ASL) on industrial cases. New features rendering the modelling of composites were also implemented in SAMCEF and NX-CAE and tested by ASL. 

The new features will be used by Airbus Safran Launcher in the frame of the analyses made for new programs, including Ariane 6. They are also commercialized in the latest version of the SAMCEF and NX-CAE software.

Next steps
Further improvements were identified, still related to a better modelling of composites in order to improve the accuracy and the reliability of the results.

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