## Models tested in current round

*ATS1-4 simple test suite*

ATS1-4 models represent 1D, 2D and 3D
finite element abstractions of constant section beam with various
boundary conditions and loads for which the theory and practice of
engineering mechanics are well understood. The models are described
using imperial units system.

The physical size of the beam is :

X direction : 16"

Y direction : 4"

Z direction : 2"

The ATS1 model represents a beam
(rectangular prism) idealized using “rod” elements (axial stiffness
element, no torsional stiffness), with the following characteristics:

• Isotropic material property

• 1000 lbf axial load in compressive (-x) direction

• Rectangular coordinate system at origin with model at [0, -2, 1]

• Isotropic material property

• 1000 lbf axial load in compressive (-x) direction

• Rectangular coordinate system at origin with model at [0, -2, 1]

The ATS2 model represents a beam
(rectangular prism) idealized using “bar” elements (axial and bending
stiffness element, no torsional stiffness), with the following
characteristics:

• Isotropic material property

• 3 load cases:

• Isotropic material property

• 3 load cases:

1. axial load in
compressive (-x) direction

2. lateral distributed load in bending (-y) direction

3. combination of 1 + 2

2. lateral distributed load in bending (-y) direction

3. combination of 1 + 2

The ATS3 model represents a beam
(rectangular prism) idealized using “shell” elements (membrane and
bending stiffness element), with the following characteristics:

• Isotropic material property

• 4 load cases:

• Isotropic material property

• 4 load cases:

1. axial distributed
load in compressive (-x) direction

2. lateral distributed load in bending (-y) direction

3. combination of 1 + 2

4. normal distributed load in bending (-z) direction

2. lateral distributed load in bending (-y) direction

3. combination of 1 + 2

4. normal distributed load in bending (-z) direction

The ATS4 model represents a beam
(rectangular prism) idealized using “solid” elements (mix of 4-noded
tetrahedral, 6-noded pentahedral and 8-noded hexahedral elements),
with the following characteristics:

• Isotropic material property

• 3 load cases:

• Isotropic material property

• 3 load cases:

1. axial loads in
compressive (-x) direction

2. lateral loads in bending (-y) direction

3. combination of 1 + 2

2. lateral loads in bending (-y) direction

3. combination of 1 + 2