in PMHS Anthropometry - UNECE
Transcript of in PMHS Anthropometry - UNECE
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N. Yoganandan
John R. Humm
Deflection Responses from PMHS in Oblique Side Impact Sled Tests
Frank A. Pintar
Medical College of Wisconsin
Milwaukee, WI
Side Impact Loading
Dummies designed for pure lateral loading
Oblique loading identified in field data
Did full scale vehicle tests with PMHS Did full‐scale vehicle tests with PMHS
Designed sled tests using these data
Issue of load‐wall for oblique loading
Load‐walls Used in Literature PMHS Anthropometry
Shoulder
Thorax
Abdomen
Pelvis (superior)
Modular Scalable Load‐wall Sled Tests
Pelvis (superior)
Pelvis (inferior) Leg plate
Vertical adjustability
Slotted posts
Tri‐axial load cells
Load‐wall Features & PMHS Alignment
Vertical adjustabilityLateral
adjustability for all the five
modular plates
2
Alignment – Top View Test Matrix
Sled ΔV: 6.7 m/s (24 km/h)
Abdomen chestband – tenth rib
Thorax chestband – xyphoid process
Regional deflections: maximum, angle
Compare with the lateral impact dataset
Front View Top View
‐2000
0
2000
4000
6000
8000
25 75 125 175
201
202
239
241
243
8000201
25 75 125 175
Time (msec)
‐2000
0
2000
4000
6000
25 75 125 175
Time (msec)
202
239
241
243
‐2000
0
2000
4000
6000
8000
25 75 125 175
201
202
239
241
243
2500020125 75 125 175
Time (msec)
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0
5000
10000
15000
20000
25 75 125 175
Time (msec)
202
239
241
243
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Time of Attainment of Peak Force (ms) Peak Force (N)
Peak Normalized Force (%)Deflection Contours
Thorax Abdomen
Deflection Contours
STERNUM
SPINE SPINE
Spine‐sternum Method
Sternum
Sternum
Spine
L0
0.5 L0
Spine
0.5 L0
4
Bilateral Method
Spine
Right Left
Spine
Right
Left
Spine Box Method
Spine
L0
0.5 L0
RightLeftSpine
0.5 L0
RightLeft
Vertebra Method
STERNUM
Vertebra Method
Vertebra Method Peak Deflections
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Sternum
Spine
Vertebral body
Mid thorax
Deflections (mm) Use Spine‐sternum Method
Sternum
Sternum
Spine
L0
0.5 L0
Spine
0.5 L0
D0
Peak Deflection Peak Angulation
Peak Deflection Vector
Dt
Mean Peak Deflection (mm)
Time of Attainment of Deflection (ms) Mean Peak Deflection Angle (degree)
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Injuries and AIS
ID AIS Summary
1 4Left rib fractures left 2‐3; 4‐5; right rib fractures
1, 4, 5; and pleural trauma
2 3Left rib fractures 2‐5 and 8‐9; and L2, L4
transverse process fractures
3 3 Left rib fractures 2‐4 and 9‐10; and 12
4 4Left rib fractures 2‐6; 8‐10, right rib 5;
laceration of the spleen
5 3 Left rib fractures 2‐4 and 9
Comparison with Pure Lateral Tests
Peak Deflections – Pure Lateral Impact
-202468
101214
0 50 100 150 200 250 300
8101214
30 - 70%
maximumNormalized
h t30% 70%
-202468
101214
0 50 100 150 200 250 300
-202468
0 50 100 150 200 250 300
25 - 75%
chestdeflection
75%25%
30% 70%
Maltese et al. 1997‐2003
Non‐modular Oblique Load‐wall Tests
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AA
Sternum
Non‐modular Oblique Load‐wall Tests
Spine
Pure Lateral Deflection Contours
U th L th Abd
Oblique Loading Deflection ContoursUpper thorax Lower thorax Abdomen
Upper thorax Lower thorax Abdomen
Comparison of Peak Deflections (mm) Deflection Angles (deg)
Injury Scaling – Mean AIS Scores
3.4
2.8
2.0.0
Modular oblique Non‐modular oblique Pure lateral
Thorax Deflection Probability Curves in Oblique Side Impact (mm)
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Abdomen Deflection Probability Curvesin Oblique Side Impact (mm)
Deflection Probability Curves in Oblique Side Impacts (mm)
Summary Designed modular and size‐scaled load‐walls
Conducted antero‐lateral oblique load tests
Thoracic and abdomen deflections (mm, deg)
Compared with pure lateral impact sled tests
Analysis of deflection data from 15 PMHS tests Analysis of deflection data from 15 PMHS tests
Lower thorax deflections are greater in oblique
Abdomen deflections are also greater in oblique
Deflection angulations are also different in oblique
Oblique loadingdifferent from pure lateral impact
Oblique injury criteria different from pure lateral
Rodney RuddStephen Ridella
Acknowledgments
US DOT NHTSA DTNH22‐07‐H‐00173 VA Medical Research