Archive for May, 2012
|Robert Yancey - Senior Director – Global Aerospace, Altair Engineering|
Composites are flying high in the aircraft industry as manufacturers look for ways to reduce weight, improve performance and create a better customer experience. Composites, of course, weigh considerably less than conventional aluminum and titanium materials, and they offer a number of other benefits as well. These include high stiffness-to-weight ratios, better fatigue performance, non-corrosive characteristics, and less susceptibility to crack growth.
That said, composites are subject to their own distinct problems. The damage modes are far different from those of metals. Delaminations and matrix cracks are common damage modes, and both can occur internal to the structure with no visible damage on the surface. This poses a problem for inspection, so many aircraft manufacturers are embedding sensors into the structure to detect damage. The manufacturing processes also are much different for composites, necessitating different equipment and tooling. The joining methods for composites require different techniques and analysis methods to design and certify.
The video describes some of the features available in HyperMesh 11.0 in order to efficiently manage FE modeling of composites components. Capabilities include importing CPD data from CAD files, visualizing ply directions and properties, and 3D realistic ply thickness and staking order visualization.
When it comes to crash simulations in the automotive development process, PSA utilizes RADIOSS to perform all of its virtual crash tests. To reduce the number of physical prototypes, it is very important to be able to accurately predict the results early within the development process as close as possible to the realistic behavior. When performing full vehicle crash simulations, the accuracy of the simulation results is highly dependent on the input data from individual components of the vehicle. By including real thickness strength and strain information from the manufacturing process the full vehicle model, or assembly, shows a much higher correlation to reality.
HyperWorks customers can access Sinaps® and SINDA/FLUINT thermal design software through the flexible and cost-effective HyperWorks Partner Alliance
Sinaps combined with SINDA/FLUINT is a comprehensive finite-difference, lumped parameter tool for heat transfer design analysis and fluid flow analysis in complex systems. Sinaps provides advanced off-the-shelf thermohydraulic model systems while also providing an advanced design module for design optimization, test correlation, and reliability engineering. Sinaps can also be used to analyze turbomachinery and rotating passages for secondary flows. This software is useful for engines, spacecraft and launch vehicle thermal analysis, electronics, turbomachinery, oil and gas pipelines, and alternative energy systems. Altair HyperWorks customers can access Sinaps and SINDA/FLUINT through the HWPA, a suite of third-party applications from HyperWorks partners that can be employed with the same units used to invoke HyperWorks software.
The aim of this article is to show how to change the wall thickness of a solid part. Mesh can be tetra or hexa elements. Two cases are presented.
Case 1: Simple geometry
Case 2: Complex geometry
This script provides a custom toolbar that allows fast and efficient mesh check and repair by isolating patches of failed elements using a clipping sphere. One can cycle through all found patches and adjust the size of the sphere. The advantage of using a clipping sphere is that one can modify geometry and mesh at the same time while keeping a consistent focused view on the failed region.