Lightweight modular structures have become a requirement in today’s world, especially for areas that are prone to occurrence of extreme events, such as earthquakes and blasts, and are situated in difficult terrains with challenging accessibility. Sandwiched composites can be one of the most suitable building units for construction of these structures due to their engineered mechanical and physical properties. Therefore, in this numerical study, performance assessment of a sandwich modular structure in the shape of a truncated cylinder is conducted under blast load. The sandwich modular structure is composed of flat and curved carbon fiber-reinforced polymer (CFRP) and extruded polystyrene (XPS) foam sandwich panels. A three-dimensional (3D) finite element (FE) model of the sandwich modular structure is developed considering the orthotropic behavior of CFRP facesheets and the crushing foam behavior is accounted for the XPS foam core in the FE modeling. The damage assessment in the CFRP facesheet is performed using Hashin’s damage criterion. Furthermore, the effect of polyurea with varying thicknesses on the blast-resistance of the structure is investigated. The polyurea is modeled as hyperelastic material using the Mooney-Rivlin model. The influence of polyurea positioning is studied when (a) applied externally to flat and curved walls of the structure directly exposed to the blast and (b) applied internally to flat and curved walls of the structure opposite to the exposure of the blast (rear face). It is observed that the flat walls of the structure are more vulnerable to the blast load than the curved walls of the structure. Moreover, a quadratic and linear reduction in the deflection of flat and curved walls with increasing thickness of polyurea coating is obtained, respectively. In addition, with increasing thickness of the additional polyurea coating, a logarithmic reduction in the kinetic energy of the sandwich modular structure is reported.
AcklandKAndersonCNgoTD (2013) Deformation of polyurea-coated steel plates under localised blast loading. International Journal of Impact Engineering51: 13–22. DOI: 10.1016/j.ijimpeng.2012.08.005.
3.
AminiMRIsaacsJBNemat-NasserS (2010) Experimental investigation of response of monolithic and bilayer plates to impulsive loads. International Journal of Impact Engineering37(1): 82–89. DOI: 10.1016/j.ijimpeng.2009.04.002.
4.
AroraHHooperPADearJP (2011) Dynamic response of full-scale sandwich composite structures subject to air-blast loading. Composites Part A: Applied Science and Manufacturing42(11): 1651–1662. DOI: 10.1016/j.compositesa.2011.07.018.
5.
AroraHHooperPDel LinzP, et al. (2012) Modelling the behaviour of composite sandwich structures when subject to air-blast loading. The International Journal of Multiphysics6(3): 199–218. DOI: 10.1260/1750-9548.6.3.199.
6.
ASCE (2008) Design of blast resistant buildings in petrochemical facilities. In: Task Committee on Blast-Resistant Design of the Petrochemical Committee of the Energy Division of American Society of Civil Engineers (ASCE).
7.
Bahei-El-DinYADvorakGJ (2007a) Behavior of sandwich plates reinforced with polyurethane/polyurea interlayers under blast loads. Journal of Sandwich Structures & Materials9(3): 261–281. DOI: 10.1177/1099636207066313.
8.
Bahei-El-DinYADvorakGJ (2007b) Wave propagation and dispersion in sandwich plates subjected to blast loads. Mechanics of Advanced Materials and Structures14(6): 465–475. DOI: 10.1080/15376490701298975.
9.
BaiYLiuCHuangG, et al. (2016) A hyper-viscoelastic constitutive model for polyurea under uniaxial compressive loading. Polymers8(4): 133. DOI: 10.3390/polym8040133.
10.
BatheKJ (2006) Finite Element Procedures. United States of America: Pearson Education Inc.
11.
BrekkenKAReyesABerstadT, et al. (2020) Sandwich panels with polymeric foam cores exposed to blast loading: an experimental and numerical investigation. Applied Sciences10(24): 9061. DOI: 10.3390/app10249061.
12.
ChenCWangXHouH, et al. (2020) Effect of strength matching on failure characteristics of polyurea coated thin metal plates under localized air blast loading: experiment and numerical analysis. Thin-Walled Structures154: 106819. DOI: 10.1016/j.tws.2020.106819.
13.
ChuDLiZYaoK, et al. (2022) Studying the strengthening mechanism and thickness effect of elastomer coating on the ballistic-resistance of the polyurea-coated steel plate. International Journal of Impact Engineering163: 104181. DOI: 10.1016/j.ijimpeng.2022.104181.
14.
DanielIMlshaiO (2006) Engineering mechanics of composite materials. Oxford: Oxford University Press, Vol 1994.
15.
El SayedTMockWMotaA, et al. (2008) Computational assessment of ballistic impact on a high strength structural steel/polyurea composite plate. Computational Mechanics43(4): 525–534. DOI: 10.1007/s00466-008-0327-6.
16.
GabrielSvon KlempererCJChung Kim YuenS, et al. (2021) Towards an understanding of the effect of adding a foam core on the blast performance of glass fibre reinforced epoxy laminate panels. Materials14(23): 7118. DOI: 10.3390/ma14237118.
17.
GauchELeBlancJShuklaA (2018) Near field underwater explosion response of polyurea coated composite cylinders. Composite Structures202: 836–852. DOI: 10.1016/j.compstruct.2018.04.048.
18.
GoelMDMatsagarVAGuptaAK (2011) Dynamic response of stiffened plates under air blast. International Journal of Protective Structures2(1): 139–155. DOI: 10.1260/2041-4196.2.1.139.
19.
GoelMDMatsagarVAMarburgS, et al. (2013) Comparative performance of stiffened sandwich foam panels under impulsive loading. Journal of Performance of Constructed Facilities27(5): 540–549. DOI: 10.1061/(asce)cf.1943-5509.0000340.
20.
GrujicicMBellWCPanduranganB, et al. (2010) Blast-wave impact-mitigation capability of polyurea when used as helmet suspension-pad material. Materials & Design31(9): 4050–4065. DOI: 10.1016/j.matdes.2010.05.002.
21.
HetheringtonJGSmithPD (2014) Blast and Ballistic Loading of Structures. London: CRC Press.
22.
LangdonGSvon KlempererCJSinclairGM (2023) Blast response of sandwich structures: the influence of curvature. Dynamic Deformation, Damage and Fracture in Composite Materials and Structures2023: 337–359. DOI: 10.1016/b978-0-12-823979-7.00013-2.
23.
LeiteFMotaCBessaJ, et al. (2022) Advanced coatings of polyureas for building blast protection: physical, chemical, thermal and mechanical characterization. Applied Sciences12(21): 10879. DOI: 10.3390/app122110879.
24.
LiLHeQGuoJ, et al. (2023a) Blast response and optimization design of polyurea-coated auxetic honeycomb sandwich panels. Applied Composite Materials30(6): 2047–2070. DOI: 10.1007/s10443-023-10160-6.
25.
LiLHeQWangY (2023b) The dynamic impact response of polyurea-coated unidirectional graded auxetic honeycomb sandwich panels. Journal of Materials Engineering and Performance2023: 193. DOI: 10.1007/s11665-023-08749-w.
26.
LiuQGuoBChenP, et al. (2022) Experimental investigation blast resistance of CFRP/polyurea composite plates under blast loading. Thin-Walled Structures181: 110149. DOI: 10.1016/j.tws.2022.110149.
27.
MatsagarVA (2013) Materials for sacrificial blast wall as protective structure. Proceedings of the Indian National Science Academy (INSA)79(4): 717–723. DOI: 10.16943/ptinsa/2013/v79i4/48006.
28.
MohottiDNgoTRamanSN, et al. (2015) Analytical and numerical investigation of polyurea layered aluminium plates subjected to high velocity projectile impact. Materials & Design82: 1–17. DOI: 10.1016/j.matdes.2015.05.036.
29.
MorinDKaarstadBLSkajaaB, et al. (2017) Testing and modelling of stiffened aluminium panels subjected to quasi-static and low-velocity impact loading. International Journal of Impact Engineering110: 97–111. DOI: 10.1016/j.ijimpeng.2017.03.002.
30.
RizwanMKhaleequzzamanSuz ZamanUK, et al. (2021) Tensile strength improvement of concrete slabs using polyurea spray. Practice Periodical on Structural Design and Construction26(1): 04020048. DOI: 10.1061/(asce)sc.1943-5576.0000530.
31.
SainiKMatsagarV (2024) Blast performance of ultra-high-performance concrete with foamed concrete and polyurea coatings. Special Publication on Developments, Applications, and Case Studies in UHPC for Bridges and Structures. Michigan: American Concrete Institute (ACI), 363, 118–136.
32.
SainiKDattaVMatsagarV (2023) Glass fiber-reinforced polymer and foam sandwich composite panel with polyurea under blast impulse. In: The 6th International Conference on Protective Structures(ICPS6). Alabama, USA, May 14 – May 17, 2023. https://www.eng.auburn.edu/icps6/index.html
33.
SharmaHSinghSPMatsagarV (2023) Modular design of industrial control room with steel and aluminium foam materials under internal or external blast loads. In: 77th RILEM Annual Week and the 1st Interdisciplinary Symposium on Smart and Sustainable Infrastructures (ISSSI 2023), Vancouver, BC, Canada, September 4 to September 8, 2023.
34.
SuQZhaiX (2018) Dynamic response of single-layer reticulated shell with explosion-protection wall under blast loading. Thin-Walled Structures127: 389–401. DOI: 10.1016/j.tws.2017.12.008.
35.
SummersPB (2008) Design of modular blast-resistant steel-framed buildings in petrochemical facilities. In: Structures Congress 2008: Crossing Borders. Reston: American Society of Civil Engineers (ASCE), 1–7.
36.
TekalurSAShuklaAShivakumarK (2008) Blast resistance of polyurea based layered composite materials. Composite Structures84(3): 271–281. DOI: 10.1016/j.compstruct.2007.08.008.
37.
WangXJiHLiX, et al. (2022) Static and dynamic compressive and tensile response of highly stretchable polyurea. International Journal of Impact Engineering166: 104250. DOI: 10.1016/j.ijimpeng.2022.104250.
38.
WeiWZhengDYangD, et al. (2022) Experimental and simulation study on blast loads of cylindrical Shells. Advances in Structural Engineering26(4): 679–692. DOI: 10.1177/13694332221135896.
39.
YinFZhiXFanF, et al. (2023) Blast loads and variability on cylindrical shells under different charge orientations. Scientific Reports13(1): 6719. DOI: 10.1038/s41598-023-30785-8.
40.
ZhangRHuangWLyuP, et al. (2022) Polyurea for blast and impact protection: a review. Polymers14(13): 2670. DOI: 10.3390/polym14132670.
