Dynamic Response of Polyurethane-hemisphere Sandwich Structure under Action of Explosive Shock Wave

doi:10.12382/bgxb.2023.0645

Abstract

Abstract:

Improvement of blast resistance of explosion-proof equipment has become a popular research topic. The current explosion-proof equipment is mainly made of metal, generally having considerable weight, the use of lattice sandwich structure can achieve lightweight. Lattice sandwich structure has good energy absorption efficiency and excellent mechanical properties at high strain rates, but the non-deformable hemispherical lattice has not been considered in the previous explosion protection research, and the research on composite polyurethane foam explosion-resistant sandwich structure is even more rare. In view of this, a new type of polyurethane-hemispherical sandwich structure is proposed in considering the energy absorption of polyurethane foam and the arch deformation resistance of hemispherical structure, and a combination of experiment and numerical simulation is used to study the dynamic response of polyurethane-hemispherical sandwich structure under the blast shockwave loading. The results show that the center point displacement of polyurethane-hemisphere sandwich structure with the approximate surface density is the smallest under 0.65m blast impact of 500g TNT, which is 30% and 35% smaller than that of aluminum plate and pure hemisphere sandwich plate, respectively. The pure hemisphere sandwich plate absorbs the most energy but has the largest deformation, and the energy absorption of polyurethane-hemisphere sandwich structure and aluminum plate is 85% and 63% of that of the pure hemisphere sandwich plate, respectively, which shows that the incorporation of polyurethane has a significant role in ensuring the energy absorption. It can be seen that, compared with the aluminum plate, the polyurethane-hemispheres sandwich structure can effectively reduce the speed and stress concentration of the target plate while ensuring the energy absorption efficiency.

Key words: polyurethane, sandwich structure, explosion shock wave, hemispheric structure, numerical simulation

CLC Number:

O383

PAN Teng, BIAN Xiaobing, YUAN Mingzheng, WANG Liangliang, HUANG Yuan, HUANG Guangyan, ZHANG Hong. Dynamic Response of Polyurethane-hemisphere Sandwich Structure under Action of Explosive Shock Wave[J]. Acta Armamentarii, 2023, 44(12): 3580-3589.

Figures/Tables 24

Fig.1 Schematic diagram of explosion-proof equipment

Fig.2 Polyurethane-hemispherical sandwich structure

Fig.3 Schematic diagram of experimental site layout

Table 1 Target plate parameters

Fig.4 Three-dimensional model of target plate

Table 2 Material parameters of AL6061-T6[19]

参数	数值	参数	数值
E/GPa	71	D₁	-0.77
G/GPa	26.69	D₂	1.45
v	0.33	D₃	-0.47
A/MPa	256	D₄	0
B/MPa	113.8	D₅	1.6
n	0.42	ρ/(kg·m^-3)	2703
C	0.002	C₁	5240
m	1.34	S₁	1.4
T_melt/K	877.6

Fig.5 Polyurethane foam structure

Table 3 Material parameters of rigid polyurethane foam

参数	数值	参数	数值
E/kPa	3.38×10⁴	σ_m/Pa	5×10⁵
ρ/(kg·m^-3)	200	DAMP	0.1
v	0.13

Fig.6 Stress-strain curve of rigid polyurethane foam

Fig.7 Target plate deformation

Table 4 Final displacement of center point of target plate observed by laser displacement sensor

靶板类型	最终位移/mm
4.5mm厚铝板	17.4
纯半球夹芯板	19.0
聚氨酯-半球夹芯结构	12.2

Fig.8 Deformation nephogram of 4.5mm-thick aluminum plate

Fig.9 Deformation nephogram of pure hemisphere sandwich panel

Fig.10 Deformation nephogram of polyurethane-hemisphere sandwich structure

Fig.11 Displacement-time curve of 4.5mm-thick aluminum plate

Fig.12 Displacement- time curve of pure hemisphere sandwich panel

Fig.13 Displacement-time curve of polyurethane-hemisphere sandwich structure

Fig.14 Center point velocities of three kinds of target plates

Fig.15 Energy absorption curves of three types of target plates under 500g TNT explosion shock

Fig.16 Stress nephogram of 4.5mm-thick aluminum plate

Fig.17 Stress nephogram of pure hemispherical sandwich panel

Fig.18 Stress nephogram of polyurethane-hemispherical sandwich structure

Table 5 Maximum stress of three types of target plates

靶板名称	4.5mm厚铝板	纯半球夹芯板	聚氨酯-半球夹芯结构
最大应力/MPa	330	345	306

Fig.19 Energy absorption curves of three target plates

References 19

[1]	MOURITZ A P. Advances in understanding the response of fibre-based polymer composites to shock waves and explosive blasts[J]. Composites Part A: Applied Science and Manufacturing, 2019, 125: 105502. doi: 10.1016/j.compositesa.2019.105502 URL
[2]	WANCHOO P, MATOS H, ROUSSEAU C E, et al. Investigations on air and underwater blast mitigation in polymeric composite structures-a review[J]. Composite Structures, 2021, 263: 113530.
[3]	LANGDON G S, YUEN S C K, NURICK G N. Experimental and numerical studies on the response of quadrangular stiffened plates. Part II: localised blast loading[J]. International Journal of Impact Engineering, 2005, 31(1): 85-111. doi: 10.1016/j.ijimpeng.2003.09.050 URL
[4]	NURICK G N, OLSON M D, FAGNAN J R, et al. Deformation and tearing of blast-loaded stiffened square plates[J]. International Journal of Impact Engineering, 1995, 16(2): 273-291. doi: 10.1016/0734-743X(94)00046-Y URL
[5]	BONORCHIS D, NURICK G N. The analysis and simulation of welded stiffener plates subjected to localised blast loading[J]. International Journal of Impact Engineering, 2010, 37(3): 260-273. doi: 10.1016/j.ijimpeng.2009.08.004 URL
[6]	CUI X D, ZHAO L M, WANG Z H, et al. Dynamic response of metallic lattice sandwich structures to impulsive loading[J]. International Journal of Impact Engineering, 2012, 43: 1-5. doi: 10.1016/j.ijimpeng.2011.11.004 URL
[7]	VO N H, PHAM T M, BI K, et al. Stress wave mitigation properties of dual-meta panels against blast loads[J]. International Journal of Impact Engineering, 2021, 154: 103877. doi: 10.1016/j.ijimpeng.2021.103877 URL
[8]	BOHARA R P, LINFORTH S, NGUYEN T, et al. Dual-mechanism auxetic-core protective sandwich structure under blast loading[J]. Composite Structures, 2022, 299: 116088. doi: 10.1016/j.compstruct.2022.116088 URL
[9]	LV W T, LI D. Quasi-static and blast resistance performance of octet-truss-filled double tubes[J]. Engineering Structures, 2023, 275: 115332. doi: 10.1016/j.engstruct.2022.115332 URL
[10]	KUMAR N V R, RAO N R, SUDHAKAR B, et al. Foaming experiments on LM25 alloy reinforced with SiC particulates[J]. Materials Science and Engineering: A, 2010, 527(21/22): 6082-6090. doi: 10.1016/j.msea.2010.06.024 URL
[11]	CAI S P, LIU J, ZHANG P, et al. Experimental study on failure mechanisms of sandwich panels with multi-layered aluminum foam/UHMWPE laminate core under combined blast and fragments loading[J]. Thin-Walled Structures, 2021, 159: 107227. doi: 10.1016/j.tws.2020.107227 URL
[12]	ZHOU N, WANG J X, JIANG D K, et al. Study on the failure mode of a sandwich composite structure under the combined actions of explosion shock wave and fragments[J]. Materials & Design, 2020, 196: 109166.
[13]	LI Y, REN X B, ZHANG X Q, et al. Deformation and failure modes of aluminum foam-cored sandwich plates under air-blast loading[J]. Composite Structures, 2021, 258: 113317. doi: 10.1016/j.compstruct.2020.113317 URL
[14]	WANG A, YU X, WANG H, et al. Dynamic response of sandwich tubes with continuously density-graded aluminum foam cores under internal explosion load[J]. Materials, 2022, 15(19): 6966. doi: 10.3390/ma15196966 URL
[15]	KOOHBOR B, KIDANE A, LU W Y, et al. Investigation of the dynamic stress-strain response of compressible polymeric foam using a non-parametric analysis[J]. International Journal of Impact Engineering, 2016, 91: 170-182. doi: 10.1016/j.ijimpeng.2016.01.007 URL
[16]	ZHOU Y, WANG T, ZHU W, et al. Evaluation of blast mitigation effects of hollow cylindrical barriers based on water and foam[J]. Composite Structures, 2022, 282: 115016. doi: 10.1016/j.compstruct.2021.115016 URL
[17]	TAGHIPOOR H, EYVAZIAN A, MUSHARAVATI F, et al. Experimental investigation of the three-point bending properties of sandwich beams with polyurethane foam-filled lattice cores[J]. Structures, 2020, 28: 424-432. doi: 10.1016/j.istruc.2020.08.082 URL
[18]	ZHANG P, CHENG Y S, LIU J, et al. Experimental study on the dynamic response of foam-filled corrugated core sandwich panels subjected to air blast loading[J]. Composites Part B: Engineering, 2016, 105: 67-81. doi: 10.1016/j.compositesb.2016.08.038 URL
[19]	AKRAM S, JAFFERY S H I, KHAN M, et al. Numerical and experimental investigation of Johnson-Cook material models for aluminum (Al 6061-T6) alloy using orthogonal machining approach[J/OL]. Advances in Mechanical Engineering, 2018, 10(9)(2018-09-14). https://doi.org/10.1177/1687814018797794.