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. The void ratio was applied to describing the changes of voids or pores during the deformation process. Then, using statistical damage theory, a constitutive model was developed for rocks to describe... the theoretical results with those observed from experiments under conventional triaxial loading conditions. Key words: rock mechanics; constitutive model; statistical damage theory; volume change; void......
Diffusion behavior at void tip and its contributions to void shrinkage during solid-state bondingC.Zhang1,2,3,M.Q.Li1,2,H.Li1,21. School of Materials Science and Engineering,Northwestern... dissimilar bonding,but for similar bonding the diffusion behavior has yet been observed via experiments.In this study,the diffusion behavior at void tip was firstly observed during similar bonding......
Molecular dynamics simulation on plasticity deformation mechanism and failure near void for magnesium alloy ZENG Xiang-guo(曾祥国), XU Shu-sheng(许书生), CHEN Hua-yan(陈华燕), LI Ji-liang(李济良) College... a void at atomic scale level were examined through molecular dynamics (MD) simulation. The modified embedded atom method (MEAM) potentials were employed to characterize the interaction between atoms......
distribution of coarse-grained soils[J]. Engineering Geology, 2020, 267: 105502. [15] PASHA A, KHOSHGHALB A, KHALILI N. Evolution of isochoric water retention curve with void ratio[J]. Computers and Geotechnics...型的计算结果如图2所示,表1所示为两者所包含的材料参数的取值. 图2 初始孔隙比对水-土特征曲线的影响及模型计算结果对比[28] Fig. 2 Effect of initial void ratios on soil-water characteristic curves and model calculation compasion[28] 表1 CALLIPOLI模型和本文模型材料参数......
of bond [7-10]. However, the influence of grain size on the void evolution and metallurgical bonding is not deeply discussed, especially on the mechanisms of void evolution and metallurgical bonding. In this work, the press bonding of Ti-6Al-4V alloy with different grain sizes of primary α phase was performed. The void evolution and distribution at the bonding interface with different grain sizes......
A DUCTILE FRACTURE CRITERION BASED ON THREE-DIMENSIONAL VOID MODEL X.H.Dong1,J.K.Huang1 (1.National Die & Mould CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030,China... a ductile fracture is proposed using a three-dimensional void model and the assumption of velocity discontinuity. The relationship between the void volume fraction and the critical strain to fracture......
Article ID: 1003-6326(2005)02-0375-04 Interface evolution of TiAl/Ti6242 transient liquid phase joint using Ti, Cu foils as insert metals DUAN Hui-ping(段辉平)1, K. H. Bohm2, V. Ventzke2, (1... D-21502, Germany) Abstract: The interface evolution of TiAl/Ti6242 joint produced by transient liquid phase(TLP) bonding with Ti, Cu foils as insert metals was investigated. The results show......
J. Cent. South Univ. (2021) 28: 1875-1887 DOI: https://doi.org/10.1007/s11771-021-4736-4 Dynamic evolution of shear rate-dependent behavior of rock discontinuity under shearing condition GU Lin-lin... the shear rate-dependent behavior of rock discontinuities, shear tests with alternating shear rates (SASRs) were conducted on rock discontinuities with various surface morphologies. The dynamic evolution......
,得到考虑变形强化和孔洞长大弱化的材料弹塑性本构方程.发展相应的有限元分析程序及数值算法,用其描述铸造镁合金试件在拉伸载荷作用下的应力与应变,塑性变形与材料孔隙率的关系以及试件缺口前缘孔隙率的变化,分析结果与实验结果有较好的一致性. 关键词:铸造镁合金; 圆柱形孔洞模型; 孔洞演化方程; 本构方程; 有限元计算; casting magnesium alloy; cylindrical void-cell model; void evolution equation; constitutive equation; finite element calculation; [全文内容正在添加中] ......
: The effects of voids (void content, void shape and size) on the interlaminar shear strength of [(±45)4/(0,90)/(±45)2]S and [(±45)/04/(0,90)/02]S composite laminates were investigated. Specimens with void contents in the range of 0.2%-8.0% for [(±45)4/(0,90)/(±45)2]S and 0.2%-6.1% for [(±45)/04/(0,90)/02]S were fabricated from carbon/epoxy fabric through varying autoclave pressures......