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TRANSCRIPT
ISTA CHINA Packaging SymposiumISTA CHINA Packaging SymposiumISTA CHINA Packaging Symposium
September 17, 2009
Guidelines for Product Improvement:
Usage of all fragile parts’ DBCs on a product
TRI Osaka Takamasa NAKAJIMA
Kobe Univ. Katsuhiko SAITO
9:40-10:15No.13
Self-introduction of speakerSelfSelf--introduction of speakerintroduction of speaker
Name : Takamasa NAKAJIMAOrganization : TRI Osaka 1988~
<Research>・ Optimal cushioning design method・ Test method for shock fragility of products・ AFS (Accumulated Fatigue Spectrum)
& Vibration Test method by AFS ( K2-Fatigue by IMV )
<Consultancy>・ Packaging (Transportation) ・ Shock & Vibration etc.
<Test & Evaluation>・ Vibration ・ Drop ・ Compression strength・ Shock fragility of product ・ Cushioning material etc.
Background of the presentationBackground of thBackground of thee presentationpresentation
This plan was selected as a national project, “Feasibility Study of Standardization” last year.
⇒ A new test procedure has been put together.
⇒ We visited CPRTC at Tianjin (Director Li Hua etc.)
and Jinan Univ. at Zhuhai (Prof. Zhi-Wei Wang etc.).
We would like to contribute a new idea to shock test standard all over the world.⇒ Both cost-cut and high quality will be realized.
Purpose of the presentationPurpose of thPurpose of thee presentationpresentation
Mechanical Shock MachineMechanical Shock MachineMechanical Shock Machine
Accelerometer
Product
Guide Rod
Shock Table
Programmer
Lifter
Measuring System
N2 Gas Cylinder
Controller
Non-damage
A
ΔV
A
t
DamageInput Shock Pulse
ΔV
Explanation of DBC( Damage Boundary Curve )
Explanation of DBCExplanation of DBC( Damage Boundary Curve )( Damage Boundary Curve )
Shock Analytical Model by R. E. NewtonShock Analytical Model by R. E. NewtonShock Analytical Model by R. E. Newton
Specimen
Part A (ex. a front panel)
Part C (ex. a power unit)
Part B(ex. a chip computer)
Part D (ex. a frame)
Product
The most fragile part
Damage Boundary
ACπΔV
C/2
ΔVC
Velocity Change
Acc
eler
atio
nCritical Velocity
Method-B
DBC and Test Method of Shock Fragility
Critical Acceleration
ΔV
A
T
Shock Test
Shock TestMethod A
GB/T 15099, ASTM D 3332, JIS Z 0119 (Dr. R.E.Newton)GB/T 15099, ASTM D 3332, GB/T 15099, ASTM D 3332, JISJIS Z 0119Z 0119 ((Dr. Dr. R.E.NewtonR.E.Newton))
GB/T 15099、ASTM D 3332 、JIS Z 0119(Dr. R.E.Newton)
GB/T 15099GB/T 15099、、ASTM D 3332 ASTM D 3332 、、JISJIS Z 0119Z 0119((Dr. Dr. R.E.NewtonR.E.Newton))
Shock test for packaging design
World ー
China GB/T 15099 -94
America ASTM D 3332
EU -
Japan JIS Z 0119
DBCs for all fragile parts↓
Guideline for product improvement
New procedure
加速度 A
速度変化 ⊿V
損傷境界曲線DBC (Damage Boundary Curve)
Acc
eler
atio
n A
Velocity Change ⊿V
Shock Test by Product Designer & Shock Test by Package Designer( IEC 68-2-27 ASTM D 3332, JIS Z 0119 )
Shock Test by Shock Test by ProductProduct DesignerDesigner && Shock Test by Shock Test by PackagePackage DesignerDesigner( IEC 68( IEC 68--22--27 ASTM D 3332, JIS Z 0119 )27 ASTM D 3332, JIS Z 0119 )
500m/s2、11ms(IEC 68-2-27)
Drop Height
DBC(ASTM D 3332)(JIS Z 0119 2002)
Ac500m/s2 ⇔ 250m/s2
An accident may happen due to lack of cushioning.
If this result is used in packaging design, ....
Ac500m/s2 ⇔ ∞Over-Packaging
Result of Shock Test for a Video-playerResult of Result of Shock Test for a VideoShock Test for a Video--playerplayer
A hook of a gear comes off. Legs of a coupler break.
Stoppers of a front frame come off.A front panel breaks.
Shock Analytical Model by R. E. NewtonShock Analytical Model by R. E. NewtonShock Analytical Model by R. E. Newton
Specimen
Part A (ex. a front panel)
Part C (ex. a power unit)
Part B(ex. a chip computer)
Part D (ex. a frame)
Product
Part A Part C Part DPart B
・・・
Product
The most fragile part
加速度 A
速度変化 ⊿V
損傷境界曲線DBC (Damage Boundary Curve)
Velocity Change ⊿V
Acc
eler
atio
nA
DBC
Part B
Part CPart A
A
B
A
B
C
A
C
A B
Shock Test by Product Designer & Shock Test by Package Designer( IEC 68-2-27 ASTM D 3332, JIS Z 0119 )
Shock Test by Shock Test by ProductProduct DesignerDesigner && Shock Test by Shock Test by PackagePackage DesignerDesigner( IEC 68( IEC 68--22--27 ASTM D 3332, JIS Z 0119 )27 ASTM D 3332, JIS Z 0119 )
A shock test result of a certain productA shock test result of a certain productA shock test result of a certain product
TestNo.
Accele.m/s2
⊿Vm/s
⊿Tms Observations
1 1930 2.31 2.01 No damage
⊿VTest
2 2110 2.49 1.98 No damage
3 2660 2.90 1.94 Part A was deformed.
4 2790 3.14 1.59 Part B was deformed.
5 3360 3.41 1.50 No damage except for A & B.
6 228 7.41 32.9 異常なし。許容加速度試験
7 279 7.20 26.1 異常なし。
8 323 7.12 22.3 部位Cが変形。
9 376 6.88 18.4 上記の他、部位Aおよび部位Dが変形。
10 419 6.93 16.8 部位A,C,Dの他、異常なし。
A shock test result of a certain productA shock test result of a certain productA shock test result of a certain product
TestNo.
Accele.m/s2
⊿Vm/s
⊿Tms
Observations
1 1930 2.31 2.01 No damage
⊿VTest
2 2110 2.49 1.98 No damage
3 2660 2.90 1.94 Part A was deformed.
4 2790 3.14 1.59 Part B was deformed.
5 3360 3.41 1.50 No damage except for A & B
6 228 7.41 32.9 No damage
ACTest
7 279 7.20 26.1 No damage
8 323 7.12 22.3 Part C was deformed.
9 376 6.88 18.4 Part A & B was deformed.
10 419 6.93 16.8 No damage except for A,C & D
製品衝撃強さ(損傷境界曲線)JIS Z 0119
100
1000
10000
1 10
速度変化(m/s)
加速度(m/s2)
Velocity change (m/s)
Acc
eler
atio
n (m
/s2 )
Result of Shock Test (DBC)
ASTM D 3332, JIS Z 0119
No damage
No damage
Part A breaks.
Part B breaks.No damage except for
Part A and Part B
No damageNo damage
Part C breaks.Part A and Part D break.
No damage except for Part A, Part C,
and PartD
製品衝撃強さ(損傷境界曲線)JIS Z 0119
100
1000
10000
1 10
速度変化(m/s)
加速度(m/s2)
Velocity change (m/s)
Acc
eler
atio
n (m
/s2 )
Result of Shock Test (DBC)
ASTM D 3332, JIS Z 0119
No damage
No damage
Part A breaks.
Part B breaks.No damage except for
Part A and Part B
No damageNo damage
Part C breaks.Part A and Part D break.
No damage except for Part A, Part C,
and PartD
ASTM D 3332
製品衝撃強さ(損傷境界曲線)JIS Z 0119
100
1000
10000
1 10
速度変化(m/s)
加速度(m/s2)
Velocity change (m/s)
Acc
eler
atio
n (m
/s2 )
Result of Shock Test (DBC)
ASTM D 3332, JIS Z 0119
No damage
No damage
Part A breaks.
No damage( Part C and Part D )
No damageNo damage
New ProcedurePart B breaks.
No damage( Part B )
Part A and Part D break.
Part C breaks.
New ProcedureResult of Shock Test ( DBC )
(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:A
Damage:C
Damage:A, B
Damage:A,C,D
Damage:A,B,C,D
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
New ProcedureResult of Shock Test ( DBC )
(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:A
Damage:C
Damage:A, B
Damage:A,C,D
Damage:A,B,C,D
If Part A is refined, ・・・
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:B
Damage:C,D
Damage:B,C,D
If Part A is refined, ・・・
ex. 1 When the max drop height is 30cm, Ac will be improved from 323 ⇒ 419 m/s2.
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:B
Damage:C,D
Damage:B,C,D
Drop Height:19cm 25.5cm 35cm calculated at e=0.3Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:B
Damage:C,D
Damage:B,C,D
ex. 2 When the max drop height is 40cm, Ac will not be improved.
Effective
Meaningless
If Part A and Part B are refined, ・・・
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:C,D
Damage:C,D
If Part A and Part B are refined, ・・・
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:C,D
Damage:C,D
Drop Height:19cm 25.5cm 35cm calculated at e=0.3Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:C
Damage:C,D
Damage:C,D
ex. 1 When the max drop height is 30cm, Ac will be improved from 323 ⇒∞ m/s2.
ex. 2 When the max drop height is 40cm, Ac will not be improved.
Very Effective
Meaningless
If Part C is refined, ・・・
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:A
Damage:A, B
Damage:A,D
Damage:A,B,D
If Part C is refined, ・・・
Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:A
Damage:A, B
Damage:A,D
Damage:A,B,D
Drop Height:19cm 25.5cm 35cm calculated at e=0.3Drop Height:19cm 25.5cm 35cm calculated at e=0.3
Result of Shock Test ( DBC )(Enlarged Graph)
200
250
300
350
400
450
500
2 2.5 3 3.5 4Velocity Change ⊿V (m/s)
Acceleration A (m/s2)
Part A
Part B
Part C
Part D
Damage:A
Damage:A, B
Damage:A,D
Damage:A,B,D
ex. 1 When the max drop height is 30cm, Ac will not be improved.
ex. 2 When the max drop height is 40cm, Ac will be improved from 279 ⇒ 323 m/s2.
Effective
Meaningless
--- The point ---By this new test procedure,product designers can geta guideline of part’s improvement.
Ex. H=30cm ⇒ “Refine Part A.”
or “Refine Part A and B.”H=40cm ⇒ “No need to refine”
or “Refine Part C.”
Result of Shock Test for a Video-playerResult of Result of Shock Test for a VideoShock Test for a Video--playerplayer
A hook of a gear comes off. Legs of a coupler break.
Stoppers of a front frame come off.A front panel breaks.
TestNo.
Am/s2
⊿Vm/s
⊿Tms
Observations
1 1180 1.42 2.10 No damage
⊿VcTest
2 1800 2.01 1.95 No damage
3 2280 2.89 2.10 No damage
4 2940 4.09 2.45 No damage
5 4100 4.96 2.05 Gear, Coupler, Panel, Frame
6 199 5.51 28.2 No damage
AcTest
7 389 5.48 14.5 No damage
8 596 5.39 9.55 No damage
9 772 5.52 7.56 Gear, Coupler
10 951 5.38 6.16 No damage except for the above
A shock test result of a certain productA shock test result of a certain productA shock test result of a certain product
Thank you very much
for your kind attention.