Dynamic strength, reinforcing mechanism and damage of ceramic metal composites

doi:10.1016/j.ijmecsci.2022.107580

IMECH-IR > 非线性力学国家重点实验室

	Dynamic strength, reinforcing mechanism and damage of ceramic metal composites
	Lin, Kuixin ; Zeng, Meng ; Chen, Hongmei ; Tao, Xiaoma ; Ouyang, Yifang ; Du, Yong 1; Peng Q(彭庆)
发表期刊	INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
	2022-10
卷号	231 页码:107580
ISSN	0020-7403
摘要	Shock tolerance is desirable for ceramic particles-reinforced metal matrix composites in many applications, where the dislocation dynamics evolution under the extreme load is the key but still elusive. Herein, we have investigated the dislocation motion and interaction under shock loading of SiC/Al nanocomposites using molecular dynamics simulations. We have demonstrated that the plastic deformation occurs at an impact velocity (0.5 km/s) lower than the Hugoniot elastic limit of aluminum due to the reflected shear wave effect. The Al/SiC interfaces act as a dislocation emitter to control dislocation multiplication density and slip direction, opening a new pathway to achieve ultrahigh-strength via shock loading. When the impact velocity (1.0 or 1.5 km/s) exceeds the Hugoniot elastic limit, the effect of nanoparticles on dislocation structure has changed from multiplying to retarding dislocations. The spall strength of composites improves due to dislocations pile-up at interface. Instead, the damage in the matrix is exacerbated, owing to the enhanced residual peak stress and interface reflection waves. In addition, the effect of abnormal shock softening determined by atomic velocity is revealed, which could be suppressed by increasing impact energy dissipation. Meanwhile, dynamic compressive strength depends on pressure and dislocation structures evolution. Our atomistic insights might be helpful in designing advanced shock-tolerant materials.
关键词	Shock wave Dislocation dynamic Hugoniot elastic limit Nanocomposites
学科领域	Engineering, Mechanical ; Mechanics
DOI	10.1016/j.ijmecsci.2022.107580
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000856556000003
项目资助者	National Natural Science Foundation of China [11964003] ; Guangxi Natural Science Foundation [2019GXNSFAA185058, 2018GXNSFAA281291] ; LiYing Program of the Institute of Mechanics, Chinese Academy of Sciences [E1Z1011001]
论文分区	一类
力学所作者排名	3+
RpAuthor	Ouyang, YF (corresponding author), Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Proc Nonferrous Metall & Featured, Nanning 530004, Peoples R China.
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90173
专题	非线性力学国家重点实验室
作者单位	1.Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Proc Nonferrous Metall & Featured, Nanning 530004, Peoples R China 2.Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lin, Kuixin,Zeng, Meng,Chen, Hongmei,et al. Dynamic strength, reinforcing mechanism and damage of ceramic metal composites[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,2022,231:107580.
APA	Lin, Kuixin.,Zeng, Meng.,Chen, Hongmei.,Tao, Xiaoma.,Ouyang, Yifang.,...&彭庆.(2022).Dynamic strength, reinforcing mechanism and damage of ceramic metal composites.INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,231,107580.
MLA	Lin, Kuixin,et al."Dynamic strength, reinforcing mechanism and damage of ceramic metal composites".INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 231(2022):107580.

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