Dynamic Simulation of an Auto-Injector Release Mechanism in RecurDyn

General Application Overview

The simulation of an Epinephrine Auto-Injector in RecurDyn demonstrates how advanced CAE tools can be used to accurately model and analyze complex mechanical systems. The focus is on understanding the release mechanism's behavior under operational conditions, providing insights into the dynamics and interactions of components critical to the system's performance. By employing RecurDyn’s flexible multi-body dynamics (MBD) environment, engineers can simulate and optimize designs with high precision, reducing development costs and time.

RecurDyn FFlex Contact Capabilities

The release mechanism of the Epinephrine Auto-Injector was modeled using RecurDyn FFlex, which allows for flexible body dynamics simulations. RecurDyn’s advanced contact algorithms are particularly effective in accurately capturing the interactions between the deformable components of the system. In this case, the FFlex model enabled a detailed evaluation of stress distributions and deformation during the activation process, ensuring that the mechanism’s functionality aligns with design requirements. The robust contact detection and handling in RecurDyn facilitate the simulation of high-fidelity interactions between rigid and flexible components, even under rapid dynamic conditions.

Detailed Spring Modeling

The main spring in the Epinephrine Auto-Injector was modeled using a finite element method (FEM) beam model, which provides a realistic representation of its mechanical properties. The FEM beam approach captures the spring’s deformation and load-bearing characteristics with precision, allowing for a detailed study of its role in the overall system.

FunctionBay GmbH offers a variety of specialized spring modeling tools in RecurDyn, including coil spring analysis, non-linear spring models, and damping systems. These tools extend the capabilities for designing and analyzing custom spring configurations, enabling engineers to tailor their simulations to specific application needs. The integration of these tools into the simulation process enhances the ability to evaluate performance and make informed design decisions.

Conclusion

This case study highlights the power of RecurDyn for analyzing complex mechanisms like the Epinephrine Auto-Injector. By leveraging FFlex modeling and advanced spring analysis tools, engineers gain valuable insights into system dynamics and component interactions, supporting the development of reliable and efficient designs. FunctionBay GmbH remains a leading provider of simulation solutions, offering tailored tools to meet diverse engineering challenges.