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지뢰방호구조 설계인자가 지뢰폭압충격 특성에 미치는 효과

박찬영1, 조종두2,#orcid

Effect of Protection Design Parameters on Mine Blast Impact Characteristics

Chanyoung Park1, Chongdu Cho2,#orcid
Journal of the Korean Society for Precision Engineering 2018;35(5):521-529.
Published online: May 1, 2018

1 인하대학교 기계공학과 대학원

2 인하대학교 기계공학과

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#E-mail: cdcho@inha.ac.kr, TEL: +82-32-860-7321
• Received: June 22, 2017   • Revised: November 7, 2017   • Accepted: December 2, 2017

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Effect of Protection Design Parameters on Mine Blast Impact Characteristics
J. Korean Soc. Precis. Eng.. 2018;35(5):521-529.   Published online May 1, 2018
DOI: https://doi.org/10.7736/KSPE.2018.35.5.521
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Effect of Protection Design Parameters on Mine Blast Impact Characteristics
J. Korean Soc. Precis. Eng.. 2018;35(5):521-529.   Published online May 1, 2018
DOI: https://doi.org/10.7736/KSPE.2018.35.5.521
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Effect of Protection Design Parameters on Mine Blast Impact Characteristics
Image Image Image Image Image Image Image Image Image Image Image Image Image
Fig. 1 Pressure-time profile for a blast wave
Fig. 2 Mine blast test for armor plate (courtesy of DSM Dyneema)
Fig. 3 Test result of armor plate (courtesy of DSM Dyneema)
Fig. 4 Finite element model for mine blast simulation and boundary condition
Fig. 5 Simulation result of armor plate (plastic deformation)
Fig. 6 Vertical displacement results of test and simulation at the center point (courtesy of DSM Dyneema in test result)
Fig. 7 Configuration of simulation model with design parameters
Fig. 8 Finite element model for mine blast analysis by DOE
Fig. 9 Measuring points for response data
Fig. 10 Vertical deformation configuration of simulation results
Fig. 11 Bottom element eroding configuration of simulation results (details)
Fig. 12 Main effects analysis of 4 design parameters
Fig. 13 Interaction plot for acceleration

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Fig. 12

Fig. 13

Effect of Protection Design Parameters on Mine Blast Impact Characteristics
Armor
plate		 Hardness
(HB)		 ρ
(kgm-3)		 σy
(MPa)		 σuts
(MPa)		 E
(GPa)		 G
(GPa)		 v
300 HB 262-302 7850 850 1050-
1250		 206 80 0.3
500 HB 480-530 7850 1250 1450-
1750		 206 80 0.3
Armor
plate		 Strain hardening Strain rate hardening
A (MPa) B (MPa) N C ε0 (s˙-1)
300 HB 818 1423 0.987 0.014 1.0
500 HB 1470 702 0.199 0.0054 1.0
Material constants 300 HB 500 HB
Temperature
constants		 Cp(J(kg-1K-1)) 450 450
Tr(K) 300 300
Tm(K) 1800 1800
m 1 1
J-C fracture
constants		 D 1 0.1 0.1
D 2 0.4 0.4
D 3 -1.3 -1.3
D 4 0.05 0.05
D 5 0 0
Material C
(mS-1)		 S1 S2 S3 γ α
300 HB 7850 4570 1.73 0 0 1.67
500 HB 4570 1.73 0 0 1.67 -
Criteria Results Error rate of real
value(%)
Test simulation
Maximum vertical
displacement rate		 6.5 6.3 About 0.6
Design parameters Level
1 2 3 4 5
DF1, stand-off (mm) 430 440 450 460 470
DF2, bottom angle (αo) 180 170 160 150 140
Armor plate
thickness
(mm)		 DF3, bottom 17.78 20.32 22.86 25.4 27.94
DF4, side 6.35 7.94 9.53 11.11 12.7
Simulation cases DF1 DF2 DF3 DF4
Stand off
increase
↓		 1 430 180 17.78 6.35
2 430 170 20.32 7.94
3 430 160 22.86 9.53
4 430 150 25.40 11.11
5 430 140 27.94 12.70
6 440 180 20.32 9.53
7 440 170 22.86 11.11
8 440 160 25.40 12.70
9 440 150 27.94 6.35
10 440 140 17.78 7.94
11 450 180 22.86 12.70
12 450 170 25.40 6.35
13 450 160 27.94 7.94
14 450 150 17.78 9.53
15 450 140 20.32 11.11
16 460 180 25.40 7.94
17 460 170 27.94 9.53
18 460 160 17.78 11.11
19 460 150 20.32 12.70
20 460 140 22.86 6.35
21 470 180 27.94 11.11
22 470 170 17.78 12.70
23 470 160 20.32 6.35
24 470 150 22.86 7.94
25 470 140 25.40 9.53
No. Response index Relevant performance
of vehicle
1 Vertical dynamic displacement (mm) human injury
2 Acceleration (g) human injury
3 Weight (kg) mobility
4 Crack occurrence protection
Simulation
cases		 Peak
displacement
(mm)		 Peak
acceleration
(g)		 Weight
(kg)		 Element
eroding
(crack)
Stand off
increase
↓		 1 223.56 652.1 88.1 ○
2 196.13 711.8 102.3 ○
3 156.94 448.3 116.2 ×
4 121.08 555.2 129.8 ×
5 87.03 523.5 143.3 ×
6 183.89 529.5 115.3 ○
7 167.49 475.3 128.9 ○
8 135.77 511.1 142.2 ×
9 104.19 540.7 103.8 ×
10 144.04 626.8 94.1 ×
11 158.81 482.7 142.7 ○
12 143.76 466.3 100.5 ×
13 116.31 502.6 114.9 ×
14 164.43 421.2 105.2 ○
15 115.46 412.9 118.5 ×
16 140.10 447.1 113.1 ○
17 126.96 663.9 127.2 ×
18 181.35 464.7 117.4 ×
19 133.75 468.9 130.5 ×
20 97.61 578.5 93.9 ×
21 120.56 504.9 140.5 ×
22 193.47 382.2 130.6 ○
23 155.67 594.8 90.3 ×
24 113.79 396.2 104.5 ×
25 81.96 411.7 118.6 ×
(a) The result of vertical displacement
Source DF Seq SS Adj MS F-value P
DF1 4 1843.0 460.8 40.37 0.000
DF2 4 13584.4 3396.1 297.56 0.000
DF3 4 15238.4 3809.6 333.79 0.000
DF4 4 42.9 10.7 0.94 0.488
Error 8 91.3 11.4
Total 24 30800.0
(b) The result of acceleration
Source DF Seq SS Adj MS F-value P
DF1 4 55364.0 13841.0 1.71 0.239
DF2 4 11123.0 2781.0 0.34 0.841
DF3 4 23251.0 5813.0 0.72 0.602
DF4 4 31208.0 7757.0 0.96 0.478
Error 8 64584.0 8073.0
Total 24 185350.0
(c) The result of weight
Source DF Seq SS Adj MS F-value P
DF1 4 3.21 0.80 1.21 0.379
DF2 4 124.02 31.01 46.63 0.000
DF3 4 1118.62 279.65 420.54 0.000
DF4 4 5657.87 1414.47 2127.08 0.000
Error 8 5.32 0.66
Total 24 6909.04
(d) The result of element eroding (crack occurrence)
Source DF Seq SS Adj MS F-value P
DF1 4 0.24 0.06 0.38 0.820
DF2 4 2.64 0.66 4.12 0.042
DF3 4 1.04 0.26 1.62 0.259
DF4 4 0.24 0.06 0.37 0.820
Error 8 1.28 0.16
Total 24 5.44
Table 1 Material properties of armor plate
Table 2 Johnson-Cook model constants of armor plate
Table 3 Temperature constants and Johnson-Cook fracture constants of material
Table 4 Mie-Gruneisen EOS constants
Table 5 Maximum displacement results of test and simulation
Table 6 Main design parameters and levels for simulation model
Table 7 Defining of simulation cases by DOE
Table 8 Responses for design parameters
Table 9 Simulation results for 25 cases
Table 10 ANOVA results of 4 design parameters

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

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