At the recent 2012 SIMULIA Community Conference (SCC), several presentations were given on the use of ATOM for nonlinear structural optimization.
Before we get any further, let's take a moment to talk about ATOM. The Abaqus Topology Optimization Module (ATOM) delivers powerful solutions for performing topology and shape optimization for single parts and assemblies, while leveraging advanced simulation capabilities, such as contact, material nonlinearity, and large deformation. Want to see ATOM in action? Watch this demo!
OK, now that you're a little more familiar with ATOM, let's see how Goodrich and GM leveraged the seamlessly integrated tool to achieve weight reduction and improve performance:
Goodrich:
Weight reduction of components and systems is of utmost importance in Aerospace industry. Reducing weight translates into higher performance and lower fuel consumption. In this paper we identify two components as candidates for weight reduction. In order to achieve this goal without sacrificing the current performance of these components we use ATOM optimization software within Abaqus environment. Current geometry models are simulated with the specified load cases to establish a baseline performance in term of stiffness and stresses. We then generate design envelopes representing the available space for topology optimization. Same load cases are applied to the optimization models with weight upper limit constraints and minimum strain energy objective functions. Optimization results suggest 10% average mass reduction when compared to the current components with significant increase in stiffness.
General Motors:
A multilink suspension offers a good balance between ride and handling performance and packaging space efficiency. It is also complex in design due to changes in link loading and compliance at high articulation travel. Therefore, geometric and material non-linearity behaviors are important to consider when designing these types of suspension components.
Structural topology optimization has been applied in linear structural design for many years. It is a proven method for developing concept designs to meet design requirements. However, most techniques of this type in use do not comprehend geometric and material nonlinearities. This may lead to suboptimal designs for components where these effects are important, such as multilink suspensions.
GM Chassis CAE has used Abaqus for many years. We have been exploring new simulation based design methods to reduce development time and provide mass-efficient vehicles to our customers. ATOM is one tool that offers the ability to optimize our designs while comprehending material and geometric nonlinearities. This study is an example of our recent efforts.
First, this study demonstrates a simulation of an integrated multilink suspension system model in Abaqus. This model includes both finite element models of the links as well as connector elements. Next, the model is assessed in Abaqus to determine the suspension strength and fatigue life of each individual link. Finally, topological design optimization is executed for this multilink suspension model using ATOM to determine the critical load path, alternative concept designs, and locations for mass reduction in order to meet the performance requirements
In the near future, there will be many other posts focused on the success stories from several other companies in a wide variety of industries. Be sure to contact your local sales representative for more information about ATOM.
