Explicit Dynamics Jun 2026

From a bullet hitting a ceramic plate to a shockwave hitting a reinforced bunker—these events involve extreme deformation rates. Only explicit methods can handle the equation of state (EOS) required for explosives.

The classic use case. When a car hits a barrier at 40 mph, the front crumples, the engine dips, and the airbag deploys—all within 150 milliseconds. Explicit codes (like LS-DYNA or Radioss) are the industry standard here. explicit dynamics

In the world of engineering simulation, we often spend our time looking for balance. We seek steady-state temperatures, static stress distributions, and converging flow patterns. But what happens when the story isn’t about equilibrium? What happens when it’s about the crash, the drop, the blast, or the milliseconds following a high-speed impact? From a bullet hitting a ceramic plate to

The "explicit" in its name refers to the mathematical method used to solve the equations of motion. When a car hits a barrier at 40

. While standard "implicit" analysis is great for steady loads, it struggles when the clock is measured in milliseconds and the forces are chaotic. Why the "Explicit" Approach? The term comes from the way the math is handled. In these simulations, the state of the system at the next tiny increment of time is calculated "explicitly" based on what is happening right now. It doesn't try to balance the whole equation at once; it simply marches forward in time, step by incredibly small step. This makes it the perfect tool for three specific scenarios: High Velocity: Impacts, crashes, and explosions. Extreme Deformation: When metal tears, rubber stretches to its limit, or glass shatters. Complex Contact: When different parts of a machine slam into each other and bounce off in fractions of a second. Real-World Impact You encounter the results of explicit dynamics every day, likely without realizing it. Automotive Safety: Engineers run thousands of virtual crash tests to design "crumple zones" that absorb energy, keeping the passenger cabin intact. Consumer Electronics: Before a new smartphone is manufactured, "drop tests" are simulated to ensure the screen won't crack from a pocket-height fall. Aerospace: It is used to simulate bird strikes on jet engines or the deployment of landing gear. The Trade-off The catch is computational power. Because the time steps must be so small to remain accurate—often a millionth of a second or less—these simulations are "expensive." They require high-performance computers to crunch the numbers. However, the payoff is a digital laboratory where engineers can test the limits of safety and durability without destroying a single physical prototype. Explicit dynamics is essentially the physics of "the bang." It allows us to slow down time, peer into the chaos of an impact, and build a world that is safer and more resilient. Would you like to dive deeper into the

Explicit dynamics is supported by major CAE software suites. Key implementations include:

The most common algorithm used in explicit dynamics is the .