Why Marc for nonlinear FEA
Accurate nonlinear analysis
Products are designed to withstand multiple loading scenarios under various environmental conditions. Hence, it is important to be able to simulate these conditions in order to get a clearer picture of the product behavior and to improve your designs. Marc offers a broad class of solution procedures that you can use to virtually simulate the desired testing conditions and service loads. The industry proven, state of the art methodologies are designed to provide you with accuracy and efficiency that you require in your development process.
Nonlinear material models
The spectrum of engineering materials in use is growing, and so is the need for extensive testing of products designed with these materials. Customizable materials like composites, plastics, elastomers, and new metal like shape memory alloys are helping engineers improve their products while operating under engineering constraints.
Marc provides users the ability to model a broad range of materials, including metals, shape memory alloys, super-plastic materials, composites, wood, plastics, rubbers, glass, concrete, powder, metals, and many more. The models incorporate temperature effects, rate effects, anddamage so they can accurately predict the behavior throughout a product’s operating range. Marc also offers an easy approach to implement new material models that used in state of the art designs and research. So, whether your designs use metals like steel and aluminum or complex materials like composites, solder, or foams, Marc provides you with industry accepted material models to accurately model their behavior.
Accurate nonlinear analysis
As newer materials are used in designs to benefit from their unique properties, it also becomes important to model the physics that control their behavior. For example, piezoelectric materials accumulate electric charge when subjected to mechanical stress, and this phenomenon is used in sensors, actuators, and motors. Also, the phenomenon of Joule heating or resistive heating due to the electric energy converted to heat has multiple applications including cooking plates and automotive defroster grids.
The multiphysics capability of Marc, when combined with its superior nonlinear structural analysis, provides more accurate results leading to better designs of your structural systems.
Marc can be used to couple structural, thermal, magnetostatics, electrostatics, induction heating, electromagnetic and fluids (laminar flow with small structural deformation) behaviors. The coupling capabilities are highly useful to improve the accuracy of manufacturing simulations like welding, curing, and forming.
Easy to set up contact analysis
Almost all designs involve interaction with other components within an assembly or interaction between assemblies transferring forces across the contact zones. In a nonlinear analysis, force direction and magnitude along with the contact zone often change continuously. For analysis accuracy, it is critical to study the normal contact stresses and the shear stresses transmitted during the component interaction.
Marc offers a unique approach in tackling this tough problem with the use of smart procedures and easy modeling. Intuitive and easy contact body definitions and automatic contact boundary detection relieve users of the burden to create contact interfaces or define master and slave surfaces. Since Marc is designed to handle both small sliding and large sliding between contact bodies with a single algorithm, users do not need to be concerned about the approach they need to use for their specific problem. Smarter procedures which do not sacrifice performance make for less work for users, while providing improved accuracy.
Failure analysis for better products
Prediction and investigation of failure is an essential step in product design. Knowing what caused failure helps improve future designs and extend product life. Multiple damage models are available for brittle materials such as concrete, ductile metals, and rubber materials. Advanced composite materials provide new challenges. The Failure and Fracture mechanics technology in Marc allows engineers to predict matrix, fiber, and delamination failures. Advanced fracture mechanics capabilities help to predict both crack initiation and crack propagation. These procedures may be used with a wide range of materials and for virtually all geometries. This provides you the tools to ensure reliable, safe designs.
Performance for improved productivity
Marc enables higher productivity through solver efficiencies delivered on multiple fronts. First, Marc helps users achieve higher efficiency through state of the art solver technology. With the falling cost of multi-core systems, parallel processing is increasingly accessible to small and medium businesses operating in a desktop environment. To help users make full use of their hardware, Marc provides parallel solvers to everyone at no additional cost. Parallelization can also be used for the element assembly and stress recovery steps to reduce the wall time for the nonlinear analysis.
Finally, through its unique implementation of domain decomposition method whereby the model is broken into smaller pieces and solved in entirety on separate processors, Marc goes beyond traditional parallelization techniques common in industry. With this approach, all the steps of FEA process including, input, stiffness matrix assembly, matrix solution, stress recovery, and output are executed in parallel on shared memory or distributed memory systems helping achieve superlinear scalability for your large models. Reducing wall time will result in more efficient simulations and better designs.
Automatic adaptive meshing
During manufacturing processes or sealing applications, and fracture mechanics, the material undergoes severe deformation due to the applied loads or contact forces. These deformations can be so large that the finite element mesh could become highly distorted leading to inaccuracy of results. Marc offers an innovative solution to overcome this problem through the use of automatic remeshing.
During the analysis, if elements become severely distorted, Marc automatically creates a new mesh from the deformed boundary. The state of the material (stresses, strains, deformations) along with contact conditions are transferred to the new, well structured mesh, and the analysis is continued. This process is repeated as many times as necessary without user intervention allowing you to solve tougher, complex nonlinear problems.
Marc provides the ability to customize the analysis software through the use of user subroutines. Over 200 are available to incorporate advanced material models, load and boundary conditions, or element technology. The GUI – can be easily customized using Python.