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ComPoLyX Print E-mail

ComPoLyX - Finite-Element Failure Analysis for Composite Structures

Overview

Failure load plot of a MotoGP rimThe heterogeneous and anisotropic build-up of laminated composite structures complicates strength and failure analyses based on Finite-Element simulations. ComPoLyX extends the abilities of available Finite-Element packages for the failure analysis of laminated composite structures.

Key features

  • Simple definition, configuration and combination of desired composite failure criteria.
  • Efficient evaluation of inverse reserve factors and failure modes for the configured failure criteria combination for every layer of every Finite Element in a composite structure.
  • Concise all-in-one-plot visualization showing the maximum inverse reserve factor of all criteria of all layers of an element together with the active failure mode.
  • Concise all-in-one-plot visualization showing the maximum inverse reserve factor over different load-cases with local indication of the most critical load-case.
  • Unique method to evaluate interlaminar normal stresses in thick curved laminates.
  • Very efficient ply-wise analysis of strains, stresses and failure criteria due to the sampling-element concept.
  • Interfaces to ASCII-based data formats of standard FEA packages (ABAQUS, ANSYS, NASTRAN).
  • Powerful graphical user interface with OpenGL visualization and model tree.
  • Python scripting interface.

Core Functionality

class40ComPoLyX evaluates Inverse Reserve Factors (IRFs) as a primary measure for every given failure criterion at all integration points of all layers of all requested Finite Elements in a composite structure. This common measure allows for easy comparison and combination of different failure criteria. Currently the following, fully configurable failure criteria are available:

  • Maximum Strain
  • Maximum Stress
  • Tsai-Wu (2D and 3D)
  • Tsai-Hill (2D and 3D)
  • Hashin (2D and 3D)Failure modes
  • Puck (simplified, 2D, 3D)
  • LaRC (2D)
  • Cuntze (2D and 3D)
  • Core failure (sandwich)
  • Face sheet wrinkling (sandwich)
  • Von Mises (isotropic materials)

For a given list of element sets, plies or laminate zones ComPoLyX computes the combination of all active failure criteria. The results can be combined within a concise all-in-one plot:

  • Contour plot with maximum IRF of all criteria of all layers.
  • Element text showing the active failure mode and the layer index of the first ply failure.

The strains and stresses can be visualized ply / layer wise by components and at bottom, mid and top of each ply / layer. Global plies are maintained within ComPoLyX and can be accessed for post-processing.

Interlaminar Normal Stress Evaluation

INSComPoLyX provides a unique method to evaluate the out-of-plane (interlaminar) normal stresses in thick-walled curved laminates modeled with standard layered shell elements. This enables the user to routinely evaluate 3D failure criteria such as Hashin, Puck, Tsai-Wu or Tsai-Hill. This post-processing method is implemented for linear and quadratic layered shell elements.

 

Platforms and Interfaces

  • GUIComPoLyX is available for 32 and 64bit Windows and Linux platforms.
  • ComPoLyX failure analysis can be applied to linear and quadratic layered shell and solid elements in arbitrary Finite-Element models created with ABAQUS, NASTRAN or ANSYS.
  • ComPoLyX can be operated through a powerful graphical user interface with OpenGL visualization and model specification tree.
  • For repeating tasks and batch-mode computations, ComPoLyX logs all user actions to Python scripts.
  • ComPoLyX employs efficiently multiple cores on shared memory multi-core machines.

New Features

The latest enhancements of ComPoLyX are:

  • Creation of user-specific element sets
  • Improved ESAComp, Nastran and Abaqus interfaces
  • Laminate analysis based on the Classical Laminate Theory (Figure CLT) considering user-defined coordinate systems and out-of-plane shear terms
  • 2D post-processing showing the stress and failure distribution through the thickness (Figure 2D analysis)
  • Section cut (Figure section cut)
  • Ply-offset visualization (Figure ply offset visualization)
  • CSV export of any results (Figure solution export)
  • Sensors evaluation mass, center of gravity and area of the (sub-) structure (Figure sensor)

Distribution Channel

ComPoLyX is promoted together with ESAComp over the Componeering Inc. distribution channel. More information can be found on the ESAComp web-site.

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