Abaqus/Explicit

Explicit dynamics in Abaqus/Explicit refers to a simulation technique used for analyzing and solving complex nonlinear systems with dynamic events, such as sudden impacts or large deformations, where the response to loads is computed explicitly over very small time increments. This method is highly effective for capturing the detailed time-dependent behavior of a model under rapidly changing conditions.

Using explicit dynamics in finite element analysis offers advantages such as:

• accurate representation of dynamic events,
• efficient computation without iterative solvers,
• precise material modeling and contact handling,
• simulation stability,
• faster turnaround times,
• and applicability across various industries.

The key difference between explicit and implicit dynamic analysis is in the numerical approaches used to solve motion equations.

Explicit analysis, like in Abaqus/Explicit, excels in short-duration events or scenarios with complex contacts and nonlinear materials. It uses small time increments to integrate motion equations directly. This method is ideal for highly nonlinear issues with discontinuities, such as impacts. However, it may require long computational times for extended events due to the small time steps needed for stability.

Implicit analysis, typically seen in Abaqus/Standard, solves simultaneous equations at each time step, making it more efficient for longer events and stable at larger time steps. However, it might not handle complex nonlinearities as effectively as explicit methods.

The choice between explicit and implicit analysis depends on the event's nature, duration, and required detail level, with explicit analysis favored for situations that challenge implicit methods due to model complexity or extreme conditions.