Quite difficult to answer to your question without more context about your problem.

If you use beam elements with a high elastic modules, you will get a flexural rigidity (linked to elstic modules + section properties). You can free 2 rotationnal degrees of freedom at your beam elements junctions : two successive elements should not share their "common node", and define a cinematic equation between the two nodes, in order to link the 3 translation DOF, ant the torsion rotationnal DOF.

Perhaps another solution : use truss elements instead of beam element, whith only 3 translation DOF => no flexion. Example : Ansys LINK180 element . But I don't know if you use the Ansys integrated LS DYNA version, and even in this environment the LINK180 element can be used in a LS-DYNA simulation.

Hi

A gift for you. The near zero rigidity introduce epistemic uncertainty. This may be removed as in Persian curve method.

Hi Dakshitha Weerasinghe

Have you tried following combinations in LS-DYNA ?

Type 6 Discrete beam + * MAT_ CABLE_DISCRETE_BEAM(*MAT 069)

or

Type 2 Belytschko-Schwer Beam + MAT_MOMENT_CURVATURE_BEAM (*MAT 166)

I recommend you to try the both options and check the results.

Hello Sir!

Not yet, sir, I'm new to beam elements. I'm thinking beam elements with fabric yarn like cross sections (manually defined) can be a better way of modelling fabrics (low cost yet high accuracy).

I will try type 2 and 6 and keep you posted.

Thank you

I think we cannot answer the question without having the exact problem, however, the flexural stiffness matrix depends mainly on the Young's modulus and the mechanical ( poisson's ratio ) and geometrical properties of the structure.

Also, I see that the problem does not depend on the type of the element used but on the properties of the structure.

If you want to get results, I think you have to consider the properties of the structure.