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SOLIDWORKS Simulation: An Intro to Composite Analysis
2018-07-09

Introduction to Composites

A composite material is a mixture of two or more materials. This is usually a stiff unidirectional fiber combined with a softer matrix element. The goal of such a mixture is to get desirable overall properties that each individual material could not provide. Composites usually exhibit good strength to weight ratio and is used primarily in the Aerospace and Biomedical applications or sporting goods like tennis racquets.

Composite Material

Figure 1: Composite Material

SOLIDWORKS Simulation Composite Analysis Capabilities

SOLIDWORKS Simulation Premium has the ability to perform a composite analysis. Users can perform a Linear Static, Buckling or Frequency analysis with composite materials.

solidworks simulation matrix

Figure 2: Simulation Product Matrix

Why use a Composite Analysis tool?

The main reason to simulate composites is that the material properties of a composite material is hard to calculate by hand. Just like simulation is intended to decrease the number of iterations needed, a composite analysis tool helps simulate different layer and angle configurations to see which material composition produces stress results that are acceptable.

Composite material with fiber angles

Figure 3: Composite material with fiber angles

There are failure criteria specific to Composites. Tsai-Wu and Tsai Hill are two composite failure criteria commonly used in the industry and these outputs can be seen using SOLIDWORKS Simulation. Finally, the stresses in each layer or the stresses between layers called interlaminar stresses may also be viewed to make critical design decisions.

Aircraft built with Carbon Fiber Composite

Figure 4: Aircraft built with carbon fiber composites

Technical Deep Dive

Composite shell definition

Figure 5: Composite shell definition

Let’s look at Composites from a technical perspective. Given the nature of where it is used, Composites are defined using Shell Elements. Hence, each composite part is assumed to have a uniform cross-section and a high length to thickness ratio. A maximum of 50 layers may be defined. The type of layups available with SOLIDWORKS Simulation are:

  • Symmetric Laminate: Plies stacked symmetric about midplane
  • Unsymmetric Laminate: Laminate does not exhibit Symmetry
  • Sandwich Plate Laminate: Softer Core with a stiffer symmetric top and bottom layers

SOLIDWORKS provides self-learning Tutorial PDFs and access to self paced Training Files. Once a user has good knowledge of how a Linear Static Analyis and Shell Meshing works, these files should get them up and running with using Composite Analysis as well. SOLIDWORKS also has the ability to export results to other FEA software like Nastran and ANSYS.

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