Evaluation of OMDB Honeycomb Barrier Size … Government Industry MSAE Government ... Evaluation of...

SAE Government Industry Meeting | January 25-27, 2017SAE Government Industry Meeting | January 25-27, 2017

Evaluation of OMDB Honeycomb

Barrier Size Reduction

SAE Government Industry Meeting | January 25-27, 2017

Objective

• Determine if the full honeycomb face used in the Offset Deformable Barrier Test Procedure can be replaced with a smaller version of the honeycomb

2


Half Honeycomb Barrier

• To make manufacturing easier the honeycomb was not reduced by 50% exactly

3

2.2 m 1.2 mHoneycombsupport


Test Procedure

• The OMDB test procedure was followed with the following exceptions– Vehicle is replaced with the FMVSS

No. 301 Moving Contoured Barrier (MCB)

– OMDB impact speed 60 kph– Three axis accelerometer triad

installed at the vehicle’s CG and on the left side frame rail for both the OMDB and MCB

4

OMDB

MCB


Video

5


Methodology

6

• Used CV < 10% to determine if the response is repeatable• Velocity is calculated

– filtering X and Y– Resultant of X and Y– Integrate resultant to get velocity

D. Rhule, H. Rhule and B. Donnelly, "The Process of Evaluation and Documentation of Crash Test Dummies for Part 572 of the Code of Federal Regulations," The 19th International Technical Conference of the Enhanced Safety of Vehicles (ESV), 2005


Test Matrix

7

Barrier Type NHTSA Test Number Name

Full9795 * Full 19797 Full 29799 Full 3

Half9796 Half 19798 Half 29800 Half 3

* 301 MCB was damaged, test not used for analysis


OMDB CG Resultant Acceleration

8

0

10

20

30

40

50

60

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt A

ccel

erat

ion

Gs

Time (seconds)

Full 2 Full 3 Half 1 Half 2 Half 3

CV=4.6%


OMDB CG Resultant Velocity

9

-5

0

5

10

15

20

25

30

35

40

45

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt V

eloc

ity (k

ph)

Time (seconds)


CV=7.2%


OMDB Left Side Resultant Velocity

10

-5

0

5

10

15

20

25

30

35

40

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt V

eloc

ity (k

ph)

Time (seconds)


CV=1.3%


MCB CG Resultant Acceleration

11

0

5

10

15

20

25

30

35

40

45

50

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt A

ccel

erat

ion

Gs

Time (seconds)


CV=9.1%


MCB CG Resultant Velocity

12

0

5

10

15

20

25

30

35

40

45

50

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt V

eloc

ity (k

ph)

Time (seconds)


CV=7.3%


MCB Left Side Resultant Acceleration

13

0

5

10

15

20

25

30

35

40

45

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt A

ccel

erat

ion

Gs

Time (seconds)


CV=4.0%


MCB Left Side Resultant Velocity

14

0

5

10

15

20

25

30

35

40

45

50

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08

Res

ulta

nt V

eloc

ity (k

ph)

Time (seconds)


CV=5.4%


MCB Rotation About the Z-axis

15

-2

0

2

4

6

8

10

12

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35

Rot

atio

n (d

egre

es)

Time (seconds)


CV=5.3%


Honeycomb Crush Measurements

16

Row 7

Row 9


Honeycomb Crush Row 7

17

-50

0

50

100

150

200

250

0 200 400 600 800 1000 1200 1400

Hon

eyco

mb

X C

rush

Row

7 (m

m)

Honeycomb Y Position (mm)


CV=6.2%


Honeycomb Crush Row 9

18

-50

0

50

100

150

200

250

0 200 400 600 800 1000 1200 1400

Hon

eyco

mb

X C

rush

Row

9 (m

m)

Honeycomb Y Position (mm)


CV=8.4%


Summary

• Half barrier results are acceptable to the full barrier– OMDB and MCB CV’s are below 10%

• Need further research– Compare vehicle and THOR results in full vehicle test

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Evaluation of OMDB Honeycomb Barrier Size … Government Industry MSAE Government ... Evaluation of...

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