June 16, 2021 at 2:16 pmConorryan98Subscriber
I'm running a hypervelocity impact simulation using SPH as seen below. The timestep gets very small until the projectile doesn't progress any further, although the cycle keeps increasing, the time and timestep don't change anymore.
Does anyone know why this is?July 14, 2021 at 4:43 pmChris QuanAnsys EmployeeThe cycle information on the bottom of the Autodyn window shows that the time step is controlled by SPH particles.
I would suggest you plotting the Vector plot of the velocity to check the velocity of SPH particles. Some SPH particles may have a very high velocity due to material failure.
If this is true, you can put a limit on the maximum velocity (default is 1E10 m/s) via Controls -> Cutoff and set the Maximum Velocity to a reasonable value such as 2 or 3 times of the impact velocity.
This will limit the SPH maximum velocity to a reasonable value and thus increase the time step.
Viewing 1 reply thread
Ansys Innovation Space
- You must be logged in to reply to this topic.
Simulation World 2022
Check out more than 70 different sessions now available on demand. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Take a leap of certainty and check out a session today here.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.Trending discussions
- explicit dynamics
- Explicit dynamics ERRORS
- turning simulation
- getting zero maximum and minimum stress value in explicit analysis
- Monte Carlo Simulation
- How do get Full values instead of just minimum and maximum ?
- Running an explicit dynamics simulation on a composite plate
- How to figure out impact force in Explicit Dynamic Analysis
- Euler Domain Restricting Simulation
- LS-Dyna not appearing in ANSYS Workbench
Top Rated Tags
© 2022 Copyright ANSYS, Inc. All rights reserved.Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.