Category - Composites

27
Feb

Effect of Defects on Part Made with AFP Using Digimat

Automatic Fiber Placement (AFP) is a fast and efficient deposition process of carbon prepreg for large component application. To accommodate the composite strips onto a double curved surface, the tows can be cut then restarted and slightly misoriented, yielding to the apparition of gaps between the tows. These two defects, i.e. the gaps and misalignment …

1
Aug

Multi-scale material modeling for additive manufacturing

While additive manufacturing of reinforced polymers is appealing and increasingly considered for production of actual parts, major obstacles must be overcome by engineers. Dimensional accuracy of the part must obey to strict tolerances that may not be met due to thermally induced part distortion or poor surface roughness. On the material side, an anisotropic material behavior is brought in by the specific 3D printed layered architecture and oriented reinforcements. This process-induced material behavior make the part mechanical response challenging to predict.

Therefore, Digimat, the material modeling platform, can offer you a solution to overcome your challenges.

24
Jun

Impact on a Stiffener for Lower B-Pillar

L&L Products is a provider of individual and innovative engineering solutions to the automotive industry and is known for superior engineering through the use of state-of-the-art simulation methods in the product development chain. However, they faced the challenges in moving towards greener technology by replacing classical metal design with composite structures. The purpose of transitioning was to utilize the outstanding performance of composite materials. However, this presented difficulties, mainly with predicting the injection molding process and achieving a high-quality prediction of the impact on a short fiber reinforced stiffener beam.  

22
Jun

Finite Element Analysis of a UAV Wing

AeroVironment’s Global Observer is an unmanned aircraft with the wingspan of a Boeing 767 but less than 10% of the weight designed to provide communications and sensing for flights lasting up to one week at up to 65,000 feet. With a maximum wing loading of only 3.5 pounds per square feet, the wingtip deflects greater than 22 feet at its design limit load.

MSC Nastran was utilized to develop nonlinear stress, structural dynamic and aeroelastic finite element models. The structural dynamics model was correlated to a ground vibration test, both of which had to accommodate the apparent mass of the air, which is atypical. The ultimate test of the nonlinear stress model was correlation with the static wing load test.

15
Jun

Structural Analysis and Model Validation for the James Webb Space Telescope ISIM Structure

The James Webb Space Telescope is a highly sensitive instrument that is positioned using a precise optical metering support structure. This supporting structure is made from composites to reduce thermal expansion effects while reducing weight. The instrument and structure are subjected to temperatures ranging from ambient during launch to cryogenic temperatures while in orbit. Dynamic and static loads are encountered during launch and in operation respectively.

1
Jun

Additive Manufacturing Modeling, Simulation, and Lifecycle Management

The expansion of additive manufacturing has created a need for simulation and data management tools that will help engineers optimize the 3D printing process in order to reduce production costs, increase robustness/reliability and improve performance by optimizing design. This blog post will explore how MSC’s simulation tools are currently being used by customers to advance 3D printing.

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