Simulation of fracture at different loading rates using molecular dynamics

被引:0
|
作者
Kim, J. [1 ]
Lim, J. [1 ]
Lim, Y. M. [1 ]
机构
[1] Yonsei Univ, Coll Engn, Sch Civil & Environm Engn, Seoul 120749, South Korea
来源
FRACTURE MECHANICS OF CONCRETE AND CONCRETE STRUCTURES, VOLS 1-3: VOL 1: NEW TRENDS IN FRACTURE MECHANICS OF CONCRETE; VOL 2: DESIGN, ASSESSMENT AND RETROFITTING OF RC STRUCTURES; VOL 3: HIGH-PERFORMANCE CONCRETE, BRICK-MASONRY AND ENVIRONMENTAL ASPECTS | 2007年 / 1-3卷
关键词
D O I
暂无
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Every material changes its failure behavior under different loading rates, and this is the so-called rate dependency of materials. In particular, brittle and quasi-brittle materials show significant change of strength and strain capacity under different loading rates. Usually this phenomenon can be found experimentally, and this effect can be utilized in many engineering aspects. Thus, formulas based on experimental results have been adopted to predict material failure behavior under a given loading rate in engineering design. Most of the parameters are expressed through diagrams as functions of strain rate. Therefore, if the strain rates are assigned for a certain application of materials, the dynamic factors can be picked from the curve. The strength under the given loading rate can be defined as a factor which multiplies the strength under a quasi-static loading condition. However, this method depends on massive experimental works, and there is still a lack of understanding of fundamental behavior of the material failure characteristics. In this paper, the fundamental failure behavior of brittle material under different loading rates is observed using a numerical simulation based on the molecular dynamics analysis. A brittle material is modeled by numerous particles with a multi-scale analysis scheme. Each particle has interactions with the other particles with Lennard-Jones potential between particles. Sub-million particles are modeled for a simulation. Numerical simulations are performed with different loading rates in a direct tensile test on specimen with a notch. The loading rates are varied over a broad range which includes the stress wave velocity of the material. The trend of the strain capacity curve and crack propagation profile can be achieved from the simulations with various loading rates. The results will provide a detailed description of failure mechanism which changes with different strain rates.
引用
收藏
页码:93 / 98
页数:6
相关论文
共 50 条
  • [11] A Molecular Dynamics Simulation of Fracture in Nanocrystalline Copper
    Pei, Linqing
    Lu, Cheng
    Tieu, Kiet
    Zhu, Hongtao
    Zhao, Xing
    Cheng, Kuiyu
    Zhang, Liang
    JOURNAL OF NANO RESEARCH, 2013, 23 : 50 - 56
  • [12] Molecular dynamics simulation on fracture mechanisms of nano-scale polycrystal under static and cyclic loading
    Inoue, H
    Akahoshi, Y
    Harada, S
    MATERIALS SCIENCE RESEARCH INTERNATIONAL, 1995, 1 (02): : 95 - 99
  • [13] Fracture toughness of calcium hydroxyapatite and spinel at different humidities and loading rates
    van der Laag, NJ
    van Dijk, AJM
    Dortmans, LJMG
    de With, G
    EURO CERAMICS VII, PT 1-3, 2002, 206-2 : 1599 - 1602
  • [14] Fracture Mechanism of Sandstone Under Triaxial Extension at Different Loading Rates
    Ma, Chunde
    Tan, Guanshuang
    Lv, Zhihai
    Yang, Wenyuan
    Zhang, Junjie
    ROCK MECHANICS AND ROCK ENGINEERING, 2023, 56 (05) : 3429 - 3450
  • [15] Fracture Mechanism of Sandstone Under Triaxial Extension at Different Loading Rates
    Chunde Ma
    Guanshuang Tan
    Zhihai Lv
    Wenyuan Yang
    Junjie Zhang
    Rock Mechanics and Rock Engineering, 2023, 56 : 3429 - 3450
  • [16] Experimental assessment of fracture of individual sand particles at different loading rates
    Parab, Niranjan D.
    Claus, Benjamin
    Hudspeth, Matthew C.
    Black, John T.
    Mondal, Alex
    Sun, Jianzhuo
    Fezzaa, Kemal
    Xiao, Xianghui
    Luo, S. N.
    Chen, Wayne
    INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2014, 68 : 8 - 14
  • [17] Study of fracture mechanism of nylon-6 at different loading rates
    Liu, Yongning
    Song, Xiaolong
    Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering, 1996, 12 (01): : 64 - 67
  • [18] Fracture model for predicting tensile strength and fracture toughness of concrete under different loading rates
    Yang, Shutong
    Wang, Mingxin
    Lan, Tian
    Liu, Shutong
    Sun, Zhongke
    CONSTRUCTION AND BUILDING MATERIALS, 2023, 365
  • [19] Understanding crystallization and amorphization in liquid Ti cooled at different rates: A molecular dynamics simulation study
    Hazarika, Manash Protim
    Bordoloi, Puja
    Tripathi, Ajay
    Chakraborty, Somendra Nath
    JOURNAL OF CHEMICAL PHYSICS, 2024, 161 (23):
  • [20] Molecular Dynamics Simulation of Crack Propagation in Nanoscale Polycrystal Nickel Based on Different Strain Rates
    Zhang, Yanqiu
    Jiang, Shuyong
    METALS, 2017, 7 (10):