共搜索到2367条信息,每页显示10条信息,共237页。用时:0小时0分0秒812毫秒
flexural capacity. Key words: lateral impact; concrete filled rectangular steel tube(CFRST); numerical simulation; parametric analysis; simplified plasticity theory 钢管混凝土结构已广泛应用于各类土木工程结构,如超高层建筑大跨空间结构...,故取模拟的冲击过程计算时间为0.03 s. 核心混凝土强度等级为C50,采用刘威[13]提供的钢管混凝土单轴受压应力应变模型,引入约束效应系数,以考虑钢管对混凝土的约束作用.由于混凝土抗拉性能较弱,采用文献[14]中的混凝土受拉应力公式表示其单轴受拉应力-应变关系.在ABAQUS材料设置中,混凝土使用软件内置的塑性损伤模型(concrete damaged plasticity),具体参数设置如......
of principal stress axis; cumulative plasticity model; pore pressure model; long-term settlement 目前,国内许多高速铁路建设在分布着大量淤泥,淤泥质黏土等软弱土的东部沿海地区.国内外研究表明,软土地基在长期列车荷载作用下,会产生较大的塑性累积变形直接影响列车的正常运营与安全[1].原京沪线铁路沪宁段,沪杭铁路等建成......
plasticity (TRIP) of retained austenite. The effects of test temperature and strain rate on the mechanical properties and strain induced transformation behavior of retained austenite in the steel were...-induced transformation; trans formation-induced plasticity (TRIP); [全文内容正在添加中] ......
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to determine the differences in leaf functional traits and phenotypic plasticity of leaf functional traits between exotic and native Compositae plant species. Leaf width of exotic plants was significantly... capture) via adjustments to leaf shape and size, thereby increasing the survival of exotic plants. The plasticity indices of single-leaf wet weight and leaf thickness of exotic plants were significantly......
results show that transformation plasticity plays an important role on the residual stress distribution. 关键词:Residual Stress; Quenching; Transformation Plasticity; Modeling; [全文内容正在添加中] ......
of polycrystalline material at high temperature were carried out. The crystal plasticity model proposed by Asaro and Needleman was applied to a polycrystal model in the finite element simulation... deformation develops over the polycrystal and that the strain concentration appears around the triple point of crystal grain boundary. Key words:crystal plasticity; finite element method; grain boundary......
deformation mechanisms are considered in the context of crystal plasticity. The model can well predict the dependence of stress-strain relations on loading angle with respect to the microstructure. The influence of the twinning and lamellar spacing on the deformation behavior and biaxial yield surfaces for PST crystals are also examined. Key words:TiAl alloy; crystal plasticity; micromechanical......
important role in controlling the fraction of retained austenite of the hot-rolledhigh strength and high plasticity steels. Key words:high strength; high plasticity; carbon; silicon; manganese; hot......
; Abstract: The influence of crystallographic orientation on the void growth in FCC crystals was numerically simulated with 3D crystal plasticity finite element by using a 3D unit cell including a spherical void, and the rate-dependent crystal plasticity theory was implemented as a user material subroutine. The results of the simulations show......