Dynamic behavior of polyurea composites subjected to high strain rate loading

Akl, W.; Ali, Mohd Hasham; Aldraihem, Osama J.; Baz, A.

doi:10.1016/j.finel.2020.103501

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…Under dynamic loading conditions, the mechanical behavior of polyurea becomes highly intricate, exhibiting several key characteristics that contribute to its enhanced explosion-proof impact resistance. These characteristics include nonlinearity in the stress-strain curve, high sensitivity to strain rate and temperature effects [35] and a strong dependence on pressure, as illustrated in Figure 4. In a study conducted by Guo et al [36], a novel type of polyurea coating was synthesized using aromatic diphenylmethane diisocyanate, high molecular weight-terminated aminopolyethers and the appropriate additives.…”

Section: Structural Features Of Polyurea Moleculesmentioning

confidence: 99%

Recent Developments in Polyurea Research for Enhanced Impact Penetration Resistance and Blast Mitigation

Wang,

Ding,

Lin

et al. 2024

Polymers

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Polyurea has gained significant attention in recent years as a functional polymer material, specifically regarding blast and impact protection. The molecular structure of polyurea is characterized by the rapid reaction between isocyanate and the terminal amine component, and forms an elastomeric copolymer that enhances substrate protection against blast impact and fragmentation penetration. At the nanoscale, a phase-separated microstructure emerges, with dispersed hard segment microregions within a continuous matrix of soft segments. This unique microstructure contributes to the remarkable mechanical properties of polyurea. To maximize these properties, it is crucial to analyze the molecular structure and explore methods like formulation optimization and the incorporation of reinforcing materials or fibers. Current research efforts in polyurea applications for protective purposes primarily concentrate on construction, infrastructure, military, transportation and industrial products and facilities. Future research directions should encompass deliberate formulation design and modification, systematic exploration of factors influencing protective performance across various applications and the integration of numerical simulations and experiments to reveal the protective mechanisms of polyurea. This paper provides an extensive literature review that specifically examines the utilization of polyurea for blast and impact protection. It encompasses discussions on material optimization, protective mechanisms and its applications in blast and impact protection.

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Section: Structural Features Of Polyurea Moleculesmentioning

confidence: 99%

Recent Developments in Polyurea Research for Enhanced Impact Penetration Resistance and Blast Mitigation

Wang,

Ding,

Lin

et al. 2024

Polymers

View full text Add to dashboard Cite

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“…Numerical analyses are a useful tool in dynamic research [38]. ABAQUS/Explicit, as a finite element model, has been widely used in solving the penetration process.…”

Section: Simulation Modelmentioning

confidence: 99%

Experimental and Numerical Investigation of Ballistic Resistance of Polyurea-Coated Aluminum Plates under Projectile Impacts

Liu

Yao

et al. 2023

Crystals

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The effects of the spraying thickness and the position on the response of aluminum plates under impact loading were studied. The impact tests and numerical simulation were conducted for the penetration process of polyurea-coated 2024 aluminum plates with tungsten sphere impacts. The results indicate the impact resistance performance is similar at slower impact velocity (500–1000 m/s), and the front (or double-side) coating has a smaller advantage. When the impact velocity rises to 1500 m/s, the back coating has a better energy-absorbing performance. The polyurea perform more efficiently with the increase in the impact velocity because the elastomer has large-scale deformation. By comparing the different thicknesses of the back coating, the residual velocity of the fragment has small changes and the impact energy absorption increased with the increase in the coating thickness. The separated phenomenon is serious in front of the bonding face with shear compression failure. In the back polyurea layer, the stripping area is smaller than the front bonding face, and the petaloid cracking is formed with tensile failure.

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“…In tension and compression experiments, polyurea has a significant nonlinear stress-strain relationship [16,24,37,38,45,56,90,91]. It is a typical viscoelastic material, which exhibits viscoelastic properties with respect to viscous dissipation to absorb impact energy and strain rate effects in its mechanical properties.…”

Section: Viscous Dissipation Within the Materials And Strain Rate Eff...mentioning

confidence: 99%

Polyurea for Blast and Impact Protection: A Review

et al. 2022

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Polyurea has attracted extensive attention from researchers and engineers in the field of blast and impact protection due to its excellent quasi-static mechanical properties and dynamic mechanical properties. Its mechanical properties and energy absorption capacity have been tuned by means of formulation optimization, molecular dynamics (MD) simulation and the addition of reinforcing materials. Owing to the special molecular structure of polyurea, the mechanism of polyurea protection against blasts and impacts is the simultaneous effect of multiple properties. For different substrates and structures, polyurea needs to provide different performance characteristics, including adhesion, hardness, breaking elongation, etc., depending on the characteristics of the load to which it is subjected. The current article reviews relevant publications in the field of polyurea blast and impact protection, including material optimization, protection mechanisms and applications in blast and impact protection.

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Dynamic behavior of polyurea composites subjected to high strain rate loading

Cited by 10 publications

References 30 publications

Recent Developments in Polyurea Research for Enhanced Impact Penetration Resistance and Blast Mitigation

Recent Developments in Polyurea Research for Enhanced Impact Penetration Resistance and Blast Mitigation

Experimental and Numerical Investigation of Ballistic Resistance of Polyurea-Coated Aluminum Plates under Projectile Impacts

Polyurea for Blast and Impact Protection: A Review

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