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Wang X, Guo Z, Hu Y, Hao G, Zheng Q, Chen J, Yang J, Jiang W. Insights into the Mechanical-Structural-Energetic Responses of RDX Nanoparticles from Molecular Dynamics Simulation. J Phys Chem A 2024; 128:6668-6676. [PMID: 39106203 DOI: 10.1021/acs.jpca.4c03638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
When the particle size of energetic materials is reduced to the nanoscale, significant changes occur in their properties and behavior. In this work, compression processes of three RDX nanoparticles (A, B, and C) were simulated using ReaxFF-lg. The mechanical, structural, and energetic responses of RDX nanoparticles during compression were revealed and characterized. Simulations reveal that the compression process of the nanoparticles can be divided into three stages: elastic stage, primary damage stage, and sustained damage stage. The temperature increase rate in the elastic phase is much lower than in the primary damage phase. In addition, we found that the smaller nanoparticle B presents a smaller elastic modulus and compressive strength, and it has a slower rate of temperature increase during the primary damage phase. Compared to cuboidal nanoparticles (A and B), the spherical nanoparticle C tends to absorb less energy during the elastic stage and exhibits slower damage rate during the primary damage stage. This is a key factor contributing to the low sensitivity of spherical nanoparticles.
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Affiliation(s)
- Xiaohe Wang
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Zhiwei Guo
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yubing Hu
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Gazi Hao
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qilong Zheng
- Xi'an Modern Chemistry Research Institute, Xi'an 710065, China
| | - Jing Chen
- Xi'an Modern Chemistry Research Institute, Xi'an 710065, China
| | - Junqing Yang
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Wei Jiang
- National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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Zhao P, Perera D, Sewell T. Molecular Dynamics Predictions of Shock‐Induced Pore Collapse in (010)‐Oriented
β
‐HMX: Effects of Sample Thickness and Transverse Orientation, and Run‐To‐Run Variability among Statistically Equivalent Samples. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202200030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Puhan Zhao
- Department of Chemistry University of Missouri Columbia MO 65211 USA
| | - Dilki Perera
- Department of Chemistry University of Missouri Columbia MO 65211 USA
| | - Tommy Sewell
- Department of Chemistry University of Missouri Columbia MO 65211 USA
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Wang L, Zhong K, Ma J, Liu J, Xu H. Learning the initial mechanical response of composite material: structure evolution and energy profile of a plastic bonded explosive under rapid loading. J Mol Model 2019; 25:31. [DOI: 10.1007/s00894-018-3913-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 12/19/2018] [Indexed: 11/28/2022]
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Olson IA, Shtukenberg AG, Kahr B, Ward MD. Dislocations in molecular crystals. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2018; 81:096501. [PMID: 30059351 DOI: 10.1088/1361-6633/aac303] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dislocations in molecular crystals remain terra incognita. Owing to the complexity of molecular structure, dislocations in molecular crystals can be difficult to understand using only the foundational concepts devised over decades for hard materials. Herein, we review the generation, structure, and physicochemical consequences of dislocations in molecular crystals. Unlike metals, ceramics, and semiconductors, molecular crystals are often characterized by flexible building units of low symmetry, thereby limiting analysis, complicating modeling, and prompting new approaches to elucidate their role in crystallography from growth to mechanics. Such considerations affect applications ranging from plastic electronics and mechanical actuators to the tableting of pharmaceuticals.
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Affiliation(s)
- Isabel A Olson
- Department of Chemistry and Molecular Design Institute, New York University, New York City, NY 10003, United States of America
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Gao C, Zhang X, Zhang C, Sui Z, Hou M, Dai R, Wang Z, Zheng X, Zhang Z. Effect of pressure gradient and new phases for 1,3,5-trinitrohexahydro-s-triazine (RDX) under high pressures. Phys Chem Chem Phys 2018; 20:14374-14383. [PMID: 29770413 DOI: 10.1039/c8cp01192c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Herein, pressure-induced phase transitions of RDX up to 50 GPa were systematically studied under different compression conditions.
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Affiliation(s)
- Chan Gao
- Department of Physics
- University of Science and Technology of China
- Hefei
- China
| | - Xueyong Zhang
- Department of Chemistry
- Purdue University
- West Lafayette
- USA
| | - Chuanchao Zhang
- Research Center of Laser Fusion
- China Academy of Engineering Physics
- Mianyang
- China
| | - Zhilei Sui
- Institute of Fluid Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Meng Hou
- Department of Physics
- University of Science and Technology of China
- Hefei
- China
| | - Rucheng Dai
- The Centre for Physical Experiments
- University of Science and Technology of China
- Hefei
- China
| | - Zhongping Wang
- The Centre for Physical Experiments
- University of Science and Technology of China
- Hefei
- China
| | - Xianxu Zheng
- Institute of Fluid Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Zengming Zhang
- The Centre for Physical Experiments
- University of Science and Technology of China
- Hefei
- China
- Key Laboratory of Strongly-Coupled Quantum Matter Physics
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