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Lumbar Spine Tests

The lumbar spine component is also validated by the use of a component test. Here the sacrum block with adapted lumbar load cell and the lumbar spine itself is mounted on a sled. On the lumbar spine, a mass body is mounted, which should represent the load on the lumbar spine from the torso of the WorldSID. The test setup is depicted in the following picture.

LumbarSpine_Test

Lumbar spine component test setup

 

The sled is loaded by the use of two different pulses (20g triangular and 35g triangular) and the orientation of the lumbar spine is made for each pulse -- 90 and 60 degree. The test configurations are listed in the table below.

 

Test Load Angle Pulse
1 90 degree 20 g triangular pulse
2 90 degree 35 g triangular pulse
3 60 degree 20 g triangular pulse
4 60 degree 35 g triangular pulse

 

Results of 90 degree, 20g configuration:

 

Mass body accelerations

Lumbar_90deg_20g_01

 

Lumbar load cell forces and moments

Lumbar_90deg_20g_02 

 
Mass body rotations
 
Lumbar_90deg_20g_03

 

 

 

Results of 90 degree, 35g configuration:

 

Mass body accelerations
 
Lumbar_90deg_35g_01


Lumbar load cell forces and moments
 
Lumbar_90deg_35g_02
 

 Mass body rotations

Lumbar_90deg_35g_03

 

 

 

Results of 60 degree, 20g configuration:


 
Mass body accelerations

Lumbar_60deg_20g_01


Lumbar load cell forces and moments 

 Lumbar_60deg_20g_02

 

Mass body rotations

Lumbar_60deg_20g_03

 

 

 

Results of 60 degree, 35g configuration:


 
Mass body accelerations
 
Lumbar_60deg_35g_01

 

Lumbar load cell forces and moments

Lumbar_60deg_35g_02

 

Mass body rotations

Lumbar_60deg_35g_03