RE: [LS-DYNA2] concrete column under impact

[l...@schwer.net]

Why are these blue (circle) and red (arrow) elements deforming?

I think they should be unconstrained?                 --len

 

From: ls-d...@googlegroups.com <ls-d...@googlegroups.com> On Behalf Of Amna Alhassany
Sent: Wednesday, February 4, 2026 10:08 PM
To: LS-DYNA2 <ls-d...@googlegroups.com>
Subject: [LS-DYNA2] concrete column under impact

 

Hello everyone,
I am working on an LS-DYNA numerical simulation of a reinforced concrete column subjected to lateral impact using an impactor .

My issue

In the experimental research paper that I am trying to validate, the impact force-time history shows two peaks (double peak response).
However, in my LS-DYNA model I always obtain only one peak (single peak), even though the impactor hits only once and then separates.

Model description

• Units: mm – ms 
• Column: solid elements (concrete + reinforcement)
• Base: fixed support
• Top: slab + additional mass tied between them
• Impactor: rigid body with initial velocity V = 0.46 mm/ms in the impact direction (Y direction).
• Contact: *CONTACT_AUTOMATIC_SURFACE_TO_SURFACE 
• I am extracting impact force from the contact resultant force
• the blue curve is the experimental test 

--
You received this message because you are subscribed to the Google Groups "LS-DYNA2" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ls-dyna2+u...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/ls-dyna2/d2be49ae-1ff7-4734-9bac-a509234a64ddn%40googlegroups.com.