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Certification
Framework to plug certification methods to assess margin of safety from the model and result information.
Methods
Each designpointset can have a different set of methods (designpointmethod entities) assigned to it.
Built-In Library of Methods
By default, HyperMesh comes with a set of methods. These methods are always available even if you register your own custom methods.
Panel Metallic Failure

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Aerospace
Essential utility tools developed using HyperMesh-Tcl.
Aeroelasticity
Import an aeroelastic finite element model with Nastran Bulk Data format.
Certification
Framework to plug certification methods to assess margin of safety from the model and result information.
- Create and Assign Structural Properties
  Structural properties are meant to be placeholders that hold local information, that can change from one structural element to another, useful for method evaluation. They usually contain extra information not directly available from FE entities or results.
- Create Beam Structural Elements
  Beam structural elements can be meshed with 1D elements or shell elements.
- Create Panel Structural Elements
  The Panel tool recognizes metallic panels or composite panels, which lead to two different configs as the structural property and method available for these configs are different.
- Create Rivet Structural Elements
  The Rivet tool recognizes rivets modelled as a collection of Shell-1D-Shell patterns. The body between two shells is made of a single 1D element. However, it detects a rivet as a multi-layered connection.
- Create Spring Structural Elements
  The Spring tool recognizes CBUSH connections and absorbs them as springs.
- Import From File
  From the Certification Browser, import several designpointsets with designpoints and structural properties in bulk from the context menu.
- Create Generic Structural Elements
  Use the Generic tool to collect elements and free body sections in designpoints.
- Organize Structural Elements
  Besides the creation of structural elements, you can reorganize existing entities in new designpointsets, the aim being to collect structural elements on which the same set of methods will run (for a given set of loadcases).
- Methods
  Each designpointset can have a different set of methods (designpointmethod entities) assigned to it.
  - Create Methods
    Create designpointmethod entities in HyperMesh using a template definition. In such templates, method prototypes are defined as a reference to functions where input arguments are mapped to attributes in the database.
  - Assign Methods
    To run methods on designpointset entities, the methods must first be assigned. Creating methods simply adds new designpointmethod entities to the database, but no reference is added to any designpointset.
  - Author Custom Methods
    Register new methods and save/import existing libraries. topics/pre_processing/aerospace/method_manager_r.html shows these steps in more detail.
  - Method Manager
    Use the Method Manager dialog to create new methods and populate libraries or import existing libraries from .xml files, as explained in previous chapters.
  - Built-In Library of Methods
    By default, HyperMesh comes with a set of methods. These methods are always available even if you register your own custom methods.
- Run Methods
  Designpointmethod entities can be evaluated, looping across loadcases, either directly on a selection of elements (if valid) or collected in designpointsets.
- Contour Methods
  Contour a single designpointset or designpointmethod. Method inputs and outputs are available to contour with aggregations.
PhysicsAI
Use PhysicsAI to build fast predictive models from CAE data. PhysicsAI can be trained on data with any physics or remeshing and without design variables.
Results Data
Results data can be post-processed using both HyperMesh and HyperView.
Developer
The Developer ribbon contains tools for automation and customization.
Plot Data
HyperGraph is a data analysis and plotting tool with interfaces to many file formats.
Multibody Modeling
MotionView is a general pre-processor for Multibody Dynamics.
Media Files
MediaView plays video files, displays static images, tracks objects, and measures distances.
Tabulate Results
Use TableView to create an Excel-like spreadsheet.
Text Files
TextView math scripts reference vector data from HyperGraph windows to automate data processing and data summary.
Publishing and Reporting
Create, define, and export reports.

View All Altair HyperWorks Help

Panel Metallic Failure

The Panel_metallic configuration is shipped with a DLL method called Panel_FailureMode. It computes four possible failure modes for a metallic panel. The method requires shell element forces to be available in the result file. It assumes a valid panel with constant thickness and retrieves thickness information from its structural property. Panel thickness is used to recompute element stress XX, YY, XY. Similarly, the structural property’s material is used to extract tensile/compressive and shear allowable. The method evaluates Margin of Safety as MS= Allowable/Stress -1 for the three directions. For directions one and two (XX and YY), depending on the stress state, either tensile or compressive allowable is used. For shear (XY) absolute stress value is considered in the margin of safety formula.

A fourth failure mode is computed as shear buckling failure of curved panel. In the latter, the highest shear force seen by all elements in the design point is considered. Shear buckling is a ratio of stress with F_scrit = $π$ ²K_cE/(12*(1- $v$ ²)*(t/b)² where Kc=Rs+0.2*W²/(R*T).

Rs is available as structural property metadata Radius_shear_constant and the default is 5.35.

Figure 1. Panel Metallic Failure Method