A composite material is a mixture of two or more materials. This is usually a stiff unidirectional fiber combined with a softer matrix element.
Composites usually exhibit good strength to weight ratio and is used primarily in the Aerospace and Biomedical applications or sporting goods like tennis racquets.
Users can perform a Linear Static, Buckling or Frequency analysis with composite materials. 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. There are failure criteria specific to Composites.
Finally, the stresses in each layer or the stresses between layers called interlaminar stresses may also be viewed to make critical design decisions. 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. 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.
Typically for aerospace companies, verification of any FEA tool is critical before they can start using it. Click Here for links to the verification documentation. Arvind enjoys playing tennis, badminton, racquetball, chess, and soccer; he is also passionate about hiking and cooking. Menu Toggle navigation. Introduction to Composites A composite material is a mixture of two or more materials. Verification Typically for aerospace companies, verification of any FEA tool is critical before they can start using it.
GoEngineer delivers software, technology and expertise that enable companies to unlock design innovation and deliver better products faster. For more information, visit goengineer. Follow goengineer. Latest posts by GoEngineer see all.This example utilizes the CATIA Composites Design workbench and the Elfini workbench to create a composite part with material properties, ply stacking, and ply orientation and perform a ply level stress analysis to determine at which pressure and location failure is expected.
The panel figure is a composite laminate composed of two seperate materials. The panel is clamped on all four edges, eliminating the rotational and translational degrees of freedom, and a pressure is applied normal to the undeformed surface.
It is expected that the elongated hole will likely be a stress concentration of the panel, but it is not clear what pressure the laminate is capable of supporting. From these results, the location and plies that are at highest risk of failure will be identified using the tsai-hill composite failure criterion, and with that information, design changes can be implemented to reduce the stress and risk of failure.
In CATIA, the Composites Design Workbench allows us to create surfaces and assign the parameters defining the composite figureas well as easily validating the producibility of the part based on the curvature of the part. All the material properties, and composite parameters, such as ply thickness, orientation, material type, weight, etc are stored in the CATPart file created in the CPD workbench figure.
The choice of material can be changed in the CATMaterial file if multiple materials are used, such as carbon fiber, fiberglass, epoxy, etc. One of the challenges when designing with composites is that, due to the typical complexity of a composite part, the part design and simulation results can be difficult to visualize, and choosing the correct design parameters required to properly define the part is often unclear.
A ply table is a simple way to understand how the composite is constructed. The table shown in figure shows how the composite is organized with ply number, material, and orientation.
Composite Finite Element Analysis (FEA)
The ply table can be used interactively with the 3D model to look at the ply properties. The plys of interest for this example are highlighted in orange. These plys are on the top and bottom and cover the entire composite and make up the elongated hole, which is the expected maximum stress of the laminate. There are a total of 5 plies that make up the elongated hole, 3 on top Ply. Another useful visualization is the ply exploder.
The ply exploder generates a 3D visual of the individual ply stacks based on the color defined for that ply. The material properties and orientation can be time-consuming when pre-processing models, but in Simulia, the process is streamlined due to the workbenches being well-integrated, eg the interactive ply table.
The boundary conditions are clamped edges, which constrains all 6 degrees of freedom for the surface edge rotation and translation. Within the Elfini workbench, additional visualization tools are available. One of such tools is the thickness fringe plot figure and the ply angle plot figure. Once we have the boundary conditions and loads applied, we can compute the model.
After about 20 seconds, we have our displacement, strain, and stress calculations for each ply. The simulation generates a large amount of data that can be cumbersome to digest, but using tools, such as specialized composites failure criteria, can make the analysis much easier and more robust.
A summary of the important material properties modulus of elasticity and material ultimate strength in compression and tension are shown as a reference to the calculations. The complete material properties are shown in the Appendix in section Appendix.
Property SG Glass. This example shows contour plots of stress, displacement, and the tsai-hill failure criterion. The mesh has been created relatively coarse for speedy calculations, but an actual engineering application should have a higher element density.
Some examples of displacement visualizations are shown in figure and. In the figurethe displacement contour lines are overlaid on a deformed model mesh based on the the 3-dimensional displacement values. The discontinuous contour plot in figure with deformation is a simple-to-interpret visual to the analyst on the validity of the results as well seeing the large deformation areas of the structure due to the various locality of plies with the relative cumulative thickness.
Stress is the measurement that is most important because our failure metric is defined as a experimentally pre-determine stress.Altair provides a comprehensive set of tools to design, analyze, and optimize your composite material structural parts and assemblies for laminated, chopped fiber, and particulate composites.
This method allows designers to quickly develop a composite detailed design that will meet performance and safety specifications. Its scope ranges from conceptual and preliminary design of layered composite structures to advanced analyses that are applicable for the final verification of a design.
SOLIDWORKS Simulation: An Intro to Composite Analysis
CoDA from Anaglyph enables concept designers to study potential composite materials, beam and plate sizes and thicknesses, and support conditions to be selected for further detailed investigation. Generate laminate definitions efficiently Visualize stacking sequence, ply orientation, and draping angle deviations on FE model Efficient and powerful mapping of geometry ply shapes to element sets Perform sophisticated post-processing at the laminate or ply level with Results Math Analysis Analysis can be carried out in OptiStruct for linear and non-linear structural problems under static, dynamic and thermal loadings, and RADIOSS for highly non-linear problems under dynamic loading and results can be post-processed in HyperView.
Analyze stiffness, strength, durability, and stability of your composite structure Utilize included or custom failure models for delamination, crack propagation, and fiber and matrix failure Understand the impact performance of composites The Altair Partner Alliance provides HyperWorks users access to additional composites analysis software.
LAP from Anaglyph is used to analyze any type of composite laminate subjected to in-plane loads and moments. LAP is used in preliminary design for tailoring a stacking sequence, then analyzing the composite component with other methods such as finite elements, and finally optimizing the design by inspecting the laminate behavior layer by layer.
The interface enables users to quickly review and export flat ply-shape geometries and changes in ply-thicknesses or orientation due to draping. The tool is not part of the partner alliance and needs to be purchased separately. StressCheck from ESRD is a comprehensive finite element analysis software tool that support advanced solution methods in linear elasticity, multi-body contact, geometric and material nonlinearities, modal and buckling analysis, fracture mechanics, laminate composite analysis, and steady state heat transfer, including temperature-dependent material properties and radiation.
Micromechanics Multiscale Designer includes solutions for micromechanics, microstructural optimization, and life prediction of complex materials which integrates modeling, simulation, testing, uncertainty quantification, and optimization of composite materials and structures at multiple spatial and temporal scales. Systematic model reduction technology to simplify complex models Mathematical rigor free of scale separation assumptions Equipped with an extensible library of parametric unit cell models Utilizes stochastics that translate geometry and material uncertainties to component uncertainties The Altair Partner Alliance provides HyperWorks users access to additional micromechanics software.
It leads to significantly more reliable results with regard to stiffness and strength of short-fiber-reinforced injection molded parts, as well as more realistic simulation of the thermo-mechanical behavior of molds and inserts.
Users can create material cards for OptiStruct, which include the degree of orientation dependent anisotropic material data for short-fiber-reinforced plastics. Complementary Solutions HyperMesh High-performance finite element pre-processor to prepare largest models, starting from import of CAD geometry to exporting an analysis run for various disciplines. Learn More OptiStruct Industry proven, modern structural analysis solver for linear and non-linear structural problems under static and dynamic loadings.
The market-leading solution for structural design and optimization. Learn More Multiscale Designer Multiscale Design is a software used for seamless integration of modeling, simulation, testing, uncertainty quantification and optimization of composite materials and structures at multiple spatial and temporal scales. Learn More View More Loading Altair and our resellers need the contact information you provide to us to contact you about our products and services.
Read More. Composites Simulation and Optimization Altair provides a comprehensive set of tools to design, analyze, and optimize your composite material structural parts and assemblies for laminated, chopped fiber, and particulate composites. One of the focal points was the composites optimization of the wings. Specialized Wins at Le Tour de France with Altair HyperWorks Learn how Specialized analyzed and improved the aerodynamic performance as well as optimized the weight and structural efficiency of the new S-Works Venge frame.
View the Video. Overview Contact Us. Complementary Solutions. HyperMesh High-performance finite element pre-processor to prepare largest models, starting from import of CAD geometry to exporting an analysis run for various disciplines.
Learn More. OptiStruct Industry proven, modern structural analysis solver for linear and non-linear structural problems under static and dynamic loadings. Multiscale Designer Multiscale Design is a software used for seamless integration of modeling, simulation, testing, uncertainty quantification and optimization of composite materials and structures at multiple spatial and temporal scales. ESAComp ESAComp is software for analysis and design of composites, ranging from conceptual design of layered composite structures to advanced analyses.The light, strong and versatile properties of composite materials make them attractive for many types of manufacturing.
Composite materials like carbon fiber CFRPtypically used in the aerospace and automotive sectors, are being used increasingly in energy, sports, construction and marine applications.
Their composite nature, however, makes accurate simulation a challenge. ANSYS offers a complete suite of tools to help you overcome this challenge. You can generate layered composite models for implicit and explicit structural and thermal, as well as fluids, simulations. ACP provides efficient layup and best-in-class solid element modeling capabilities and a platform that offers many ways to exchange model information. It helps you to simulate the curing process of a part and predicts residual stresses and process- induced distortions.
Home Products Structures Composite Materials. Composite Materials The light, strong and versatile properties of composite materials make them attractive for many types of manufacturing. Examples Faster than the Wind - Article. Simulating Composite Structures - White Paper. Designing Solid Composites - Article.Composites are used in a wide variety of industries.
Composite material design simulation tools
From sporting goods to aircraft, composites can be the optimum choice for your project. We can show you how to best utilize composites in your design for creating models that get you faster to the manufacturable end product with still having high impact strength. Composites can be the material of choice for a vast array of projects and applications. Femap supports composite analysis by providing many tools for modeling and postprocessing results on composite structures.
For modeling, Femap provides the laminate editor and viewer, which allows you to define and modify plies of a laminate. With this laminate editor, you can immediately view the equivalent properties on the fly such as the equivalent properties of the overall laminate for stiffness and CTE.
Support for both 2D and 3D composites with various failure theories is included. Also, global ply postprocessing can be performed to allow for viewing of results on continuous plies throughout the model.
NX Nastran is the ideal tool for analyzing composite structures. NX Nastran also includes a number of failure theories and can directly calculate both failure index and a strength ratio for each ply of the laminate for every element in the model. Sizing is easy once you know which direction is experiencing the lowest margins. The PCOMP card can simulate all types of composite structures, from solid laminates, foam cores and honeycomb core layups.
It greatly simplifies the task of design, analysis, and manufacture of composite parts by giving engineers the tools to easily modify, update, and iterate on composite designs. This allows the engineer to work with combinations of material types, fiber orientations, stack-up orders, balance, symmetry, drop-offs, splices, and dart definitions.
The add-in integrates this large set of attributes into the design by automatically creating ply-geometry, assessing ply-level producability, and providing excellent exchange of analysis and manufacturing data.Finite Element Analysis of the thermo Mechanical Behavior of composite
HyperSizer provides six steps to help design and optimize laminates simultaneously for strength, stability, and manufacturability. It begins by generating composite laminates, defining optimum layup areas and end-of-ply transition zones on the part surface, solving for ply count compatibility across the zones, and then sequencing the actual ply ordering while reducing weight and minimizing ply drops.
Factors are provided for controlling which plies to drop, plies to maintain continuous across transitions, and the amount of interleaving. Composite Design and Analysis Software.This 5-session, live online course will cover a range of topics, all aimed at structural designers and engineers.
The objective of this course is to break down the composite analysis process into clearly defined steps, give an overview of the physics involved and show how to successfully implement practical solutions using Finite Element Analysis. The challenge for the designer and analyst is to make decisions on the type of idealization and level of detail required in the Finite Element Analysis. Your design may include:. NAFEMS e-learning gives you the best of both worlds, giving you real, practical knowledge that you can use day-to-day to improve your analyses.
All attendees on the course will be able to download a fully functioning Composite Stiffness and Strength Calculator, together with user guide. Many past attendees have found this tool a useful supplement to post processing available in their usual Finite Element solution.
Attendees will be entitled to future upgrades. Students will join the audio portion of the meetings by utilizing the VoIP i. If you are interested in additional pricing to call-in using a toll-free line, please send an email to: e-learning nafems. This is a five-session online training course, with each session lasting for approximately 2. Would you like us to notify you when the next course is open for enrollment? If so, add yourself to the eLearning Waitlist.
Telephony surcharges may apply for attendees who are located outside of North America, South America and Europe. We have made a VoIP option available so anyone attending the class can join using a headset headphones connected to the computer. Please send an email to the e-Learning coordinator e-learning nafems. Just as with a live face-to-face training course, each registration only covers one person.
Stay up to date with our technology updates, events, special offers, news, publications and training. Toggle navigation. Time to take a closer look at Composites FEA? Need a clear path through analysis setup and interpretation? This industry-leading, code-independent e-learning course gives you the background for effective FEA. Composite Finite Element Analysis This 5-session, live online course will cover a range of topics, all aimed at structural designers and engineers.
Composite systems include many more factors than conventional metallic structures. Moving to composite structures will allow you to explore: increased structural strength and stiffness to weight ratios simpler manufacturing processes more innovative design capabilities Composite materials span: cheap and freely available glass fiber reinforced systems exotic and tailored carbon, boron or Kevlar systems many other fiber and matrix systems The challenge for the designer and analyst is to make decisions on the type of idealization and level of detail required in the Finite Element Analysis.
Your design may include: thick composite sections with large numbers of plies regions of significant ply drop off tee joints loaded in tension structural shapes causing changes in draping angle or thickness Analysis is further complicated by: a wide range of failure theories large amounts of stress and strain data for each ply We can help you plan a strategy for dealing with these challenges.
You can either attend the live sessions or take the course on-demand at your leisure. A full set of notes in PDF format will be available for download. Each session is presented live and is available for review via a streamable recording.
Personal passwords are provided to allow you to access e-learning backup material via our special bulletin board. Reading lists, homework submissions, supplementary data are all stored as files on the bulletin board. Interaction via the bulletin board is strongly encouraged to obtain the most from the e-learning class. Typically the board runs for 4 weeks after the last live class sessions, giving you plenty of time to catch up with homework, review and ask questions.
Note : homework is purely voluntary! Free Composite Stiffness and Strength Calculator All attendees on the course will be able to download a fully functioning Composite Stiffness and Strength Calculator, together with user guide.
Carry out the homework tasks Explore composite layup stiffness and strength Calculate Failure Index and Strength Ratios Display ABD matrices View full details of calculation ply by ply Many past attendees have found this tool a useful supplement to post processing available in their usual Finite Element solution. Course Program This is a five-session online training course, with each session lasting for approximately 2.Composite systems include many more factors than conventional metallic structures.
Moving to composite structures will allow you to explore increased structural strength and stiffness to weight ratiossimpler manufacturing processes and more innovative design capabilities. The objective of this course is to break down the composite analysis process into clearly defined steps, give an overview of the physics involved and show how to successfully implement practical solutions using Finite Element Analysis.
Composite materials include cheap and freely available glass fiber reinforced systems, exotic and tailored carbon, boron or Kevlar systems, and many other fiber and matrix systems The challenge for the designer and analyst is to make decisions on the type of idealization and level of detail required in the Finite Element Analysis.
Your design may include thick composite sections with large numbers of plies, regions of significant ply drop off, tee joints loaded in tension, or structural shapes causing changes in draping angle or thickness. Analysis is further complicated by a wide range of failure theories and large amounts of stress and strain data for each ply.
Get in touch to discuss your next steps with our experienced training team. We can work closely with you to understand your specific requirements, cater for your specific industry sector or analysis type, and produce a truly personalised training solution for your organisation. All NAFEMS training courses are entirely code independentmeaning they are suitable for users of any software package.
Realistic Simulation for Composite Materials
Courses are available to both members and non-members of NAFEMS, although member organisations will enjoy a significant discount on all fees.
NAFEMS course tutors enjoy a world-class reputation in the engineering analysis community, and with decades of experience between them, will deliver tangible benefits to you, your analysis team, and your wider organisation. Find out more. Stay up to date with our technology updates, events, special offers, news, publications and training. Toggle navigation.
Your design may include thick composite sections with large numbers of plies, regions of significant ply drop off, tee joints loaded in tension, or structural shapes causing changes in draping angle or thickness Analysis is further complicated by a wide range of failure theories and large amounts of stress and strain data for each ply This course helps you plan a strategy for dealing with these challenges. Who Should Attend? Engineers and analysts who want to know more about composite FEA and its implementation.
Identify the laminated elements available in any system used, highlighting any developer preferences. Discuss the sources of approximation inherent in finite element analysis of composite materials and structures. Describe the approximate post-processing method used with some elements to obtain inter-ply shear and normal stresses. Explain how manufacturing methods can lead to fibre direction and volume fraction variations from the "as-specified" or "ideal".
Discuss scenarios where a Representative Volume Element modelling approach would be appropriate. Contrast the relative significance of transverse shearing effects for composites and isotropic homogeneous materials.
Explain the term quasi-isotropic and illustrate a laminate specification where this might be a reasonable assumption. Illustrate the approximate nature of finite element analysis, through examples chosen from your industry sector or branch of engineering.
EComposite FEAplain continuum theory and why continuum methods cannot be used at the atomistic scale.