# Tag - advanced composites

15
Apr

## Lightweight, High Performance Composites – How to Account for the Uncertainty in Composite Material Properties

Question: How can I account for the uncertainty in composite material properties? Answer: You can perform a Stochastic Analysis. I've quoted a description from Andrew Main's Use of Finite Element Analysis to Create Robust Composite Designs – Going Beyond First Ply Failure. Stochastic analysis is not a method that was developed for composites but the large …

9
Apr

## Lightweight, High Performance Composites – Using FEA to Predict the Gradual Failure of Adhesives

Question: How can FEA be used to model the gradual failure of adhesives in composites? Answer: You use the cohesive zone modeling technique. Here is quick explanation of CZM from Andrew Main’s Use of Finite Element Analysis to Create Robust Composite Designs – Going Beyond First Ply Failure. Unlike virtual crack closure, cohesive zone modeling …

5
Apr

## Lightweight, High Performance Composites – Predicting crack propagation of adhesives and resins

Question: How can FEA be used to predict the crack propagation of adhesives and resins in composites? Answer: You use the virtual crack closure technique. These methods work well for brittle adhesives, but if you have more flexible adhesives, use the cohesive zone modeling technique.  Here is quick explanation of VCCT from Andrew Main’s Use of …

3
Apr

## Over Designing Fiber Reinforced Plastics

Attend our seminar in Southern California on April 23, 3013 Attend training in Indiana on May 30, 2013 Imagine you have designed a part, only to find out later the predicted maximum stresses are in fact lower. It’s too late to make any design modifications, and now your part is produced for a maximum stress …

21
Mar

## Your FEA predictions are 40%-80% off from experiment. Solution: Model your composites as anisotropic, not isotropic.

Attend our seminar in Southern California on April 23, 3013 Attend training in Indiana on May 30, 2013 Question: Consider the plot below of an actual example from Trelleborg. My FEA prediction of my composite part (short fiber reinforced plastic), colored in green, is far from my experimental result, colored in blue. How can I improve …

17
Jan

## Lightweight, High Performance Composites – ixent GmbH Uses MSC Nastran for the Layout & Simulation of Composite Structures

Innovative simulation methods support the development of lightweight structures SANTA ANA, CA–(Business Wire – January 17th, 2013) – MSC Software Corporation, the leader in multidiscipline simulation solutions that accelerate product innovation, today announced that ixent GmbH is using MSC Nastran for the layout and simulation of composite structures. Lightweight design is a primary objective for …

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