ASTM coupon builder

Input source

Run a generated coupon or an existing file

Coupon

Geometry

Mesh

Elastic regions near boundary conditions

Protected element layers Region around

Off by default. The selected elements keep the same orthotropic stiffness and density, with damage disabled. Amber elements show the protected zone. If the zone covers the whole specimen, the entire model is elastic.

Layup

Preset Ply angles (deg) Name in file name

Load case

Direction Applied strain Prescribed displacement = strain x coupon length. Step time s Field output intervals Gauge node set at x mm Position of the extra distXnodes set.

LS-DYNA deck

Download the complete include-based deck as a ZIP or individual keyword files. Set the user-material library path for your LS-DYNA installation. Rigid grips are not supported.

Solve

Writes the input file and runs it with Fortran + VUMAT. No contact, so decks with rigid grips are refused.

Solve writes the current coupon to output/ and runs that.

Stop after peak load Load drop tolerance (%) Minimum peak stress (MPa)

Allows a 5% load drop by default, and only stops once peak nominal stress has reached 5 MPa. Both limits are adjustable. For imported files, choose their unit system. Disable this to follow the full response.

Nominal stress = total axial support reaction / minimum undeformed net cross-section. Tension is positive; compression is negative in the CSV.

Saved simulations

Runs continue while you edit or leave this page. One coupon run at a time. Curves and contours update at output points and are saved on the server.

Open results

Material

Property set

Parameter sweep

Property Values One input file per value.

Rigid grips

Clamp the coupon between rigid plates

View Material axes (1 fibre, 2 transverse, 3 normal) Node boundary conditions Elastic zones (amber) Scroll: zoom · Drag: pan · In 3D: drag to rotate, Shift/right-drag to pan