(
A more complicated truss example
load at node 1 in -Y direction of  707, AE=10^6 
supported at nodes 3 and 5 
Final deflection at node 1 is = -1.0

Osman Buyukisik    osman@fuse.net
)

echo -no
number_of_space_dimensions 2
materi_velocity
materi_displacement
materi_stress
end_initia

( geometrically linear calculation)
options_convection -no
options_mesh  -fixed_in_space -fixed_in_space

node 1  0 50
node 2  50 0
node 3  150 0
node 4  100 50
node 5  150 50

element 1  -truss 1 2
element 2  -truss 2 3
element 3  -truss 3 5
element 4  -truss 2 4
element 5  -truss 3 4
element 6  -truss 1 4
element 7  -truss 4 5

group_type 0  -truss
group_truss_young 0  1.0e6
group_truss_area 0  1.0

bounda_force   0  1 -vely
bounda_time    0  0.0 -707  100. -707.0
bounda_unknown 1  5 -velx -vely 
bounda_time    1  0. 0. 100. 0.
bounda_unknown 2  3 -velx 
bounda_time    2  0.  0.  100. 0.

control_timestep 0  1.e-3 1.0
control_timestep_iterations_automatic 0 0.00001  0.02
control_options_solver 0 -matrix_iterative_bicg
control_relaxation_materi_velocity 0  1.0e4
(
control_print    0  -time_current 
)

target_item    0  -node_dof 1 -disy
target_value   0  -1.00 1.e-2
end_data

