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1)  plasticity gradient volume element
塑性梯度体元
1.
Study of plasticity gradient volume element and start-up mechanism of strain localization;
塑性梯度体元及应变局部化启动机制分析
2)  gradient-dependent plasticity
梯度塑性
1.
In order to circumvent the mesh-dependence problem in calculating the shear band for slope stability by finite element methods,the gradient-dependent plasticity theory is adopted.
为了解决边坡稳定分析中剪切带有限元网格的依赖性问题,采用梯度塑性理论,从本构关系中引入特征长度入手,建立计算模型。
2.
The interaction between the two kinds of internal length scales is analyzed when the gradient-dependent plasticity is introduced to a multiphase material model to study the dynamic strain localization phenomenon of saturated and partially saturated porous media.
讨论了引入梯度塑性模型情况下的含液多孔介质双重内尺度律的特征以及相互作用问题。
3.
Based on the gradient-dependent plasticity theory,the coupling behavior of the elastic and plastic deformation of rock is considered and a relatively elastic-plastic coupling model is proposed for a simple rock specimen in this paper.
在梯度塑性模型的基础上,假定弹性模量是塑性应变的函数,考虑应变局部化带带内和带外弹性模量的不同变化,对单轴压缩岩样作了考虑弹塑性耦合的梯度塑性分析。
3)  gradient plasticity
梯度塑性
1.
Based on strain gradient plasticity theory, the second gradient term is introduced into the yield function.
采用梯度塑性理论研究单轴压缩作用下岩石变形局部化,得到了单轴压缩作用下岩石变形局部化带宽度的一维、二维解析解,为实验测定内部材料长度参数提供了理论依据。
2.
The finite element method of elasto-gradient plasticity is proposed in this paper, and some problems of the shear band of plane stress have been calculated by this method.
提出弹性梯度塑性有限元方法,并对平面应力剪切带问题进行计算。
3.
A numerical method attributed to a solution procedure of linear complementary problem(LCP) for gradient plasticity continuum is proposed.
对梯度塑性连续体提出了一个归结为线性互补问题的数值分析方法。
4)  strain gradient plasticity
应变梯度塑性
1.
Simulation of size effect on strength and elongation of Al alloy wity rarticles reinforcement using strain gradient plasticity concept;
运用应变梯度塑性理论模拟颗粒增强铝合金强度及延伸率的尺寸效应
2.
A modified micro-bend test method for determining the intrinsic materials length in strain gradient plasticity has been developed and described.
提出了一种用微弯曲实验测定材料的与应变梯度塑性相联系的内禀长度的新方法。
3.
Therefore, it is necessary to establish new constitutive models—strain gradient plasticity theories which possess the intrinsic material length.
经典塑性理论不含任何长度参数,因此无法预测尺寸效应,建立包含内禀材料长度参数的新的本构模型—应变梯度塑性理论就势在必行。
5)  gradient-dependent plasticity
梯度塑性理论
1.
Analysis of necking under condition of uniaxial tension of low-carbon steel specimen based on gradient-dependent plasticity;
基于梯度塑性理论的单向拉伸低碳钢试样颈缩分析
2.
Analysis of deformation and stability of rock specimen under uniaxial compressive and shear stresses based on gradient-dependent plasticity;
基于梯度塑性理论的岩样在压剪条件下变形及稳定性分析
3.
Application prospect of gradient-dependent plasticity in forecasting geological hazards;
梯度塑性理论及其在地质灾害预测研究中的应用
6)  generalized gradient-dependent plasticity
广义塑性梯度
1.
Considering the Laplace operator of plastic strains in the double yield functionst,he control equations of the generalized gradient-dependent plasticity model are established to describe both the strain localization characteristics and the basic mechanical characteristics of geomaterials.
广义塑性梯度模型在双屈服函数中分别考虑塑性剪切应变和塑性体积应变的拉普拉斯项,用虚功方程和屈服函数的一致性条件建立控制微分方程。
补充资料:SBS热塑性弹性体
    SBS属苯乙烯类热塑性弹性体,是苯乙烯-丁二烯-苯乙烯三嵌段共聚物(Styrene Butadiene styrene block polymer)称为热塑性丁苯嵌段共聚物或热塑性丁苯橡胶,简称SBS。根据合成方法不同.SBS有线型结构和星型结构,线型SBS的结构式见图。SBS中的聚苯乙烯(PS)链段和聚丁二烯(PB)链段明显地呈两相结构,PB为连续相,PS为分散相.互不相容,呈相分离状态。聚苯乙烯球状聚集区域起交联点和补强粒子作用。线型SBS平均分子量(8-l2)万,星型SBS平均分子量14-30万。SBS的分子量对性能有很大影响,分子量大,溶液粘度大,粘接强度高。SBS产品中的单体组成比很重要,随着苯乙烯与丁二烯之比S/B增大,聚合物溶液粘度变小,拉伸强度和硬度增加。SBS为两相结构,故有两个玻璃化温度Tg1(橡胶相)和Tg2(树脂相)。
    SBS外观为白色疏松柱状,相对密度0.92-0.95。SBS具有优良的拉伸强度、弹性和电性能.永久变形小,屈挠和回弹性好,表面摩擦大。耐臭氧、氧和紫外线照射性能与丁苯橡胶类似。透气性优异。由于主链含有双键致使SBS耐老化较差,在高温空气的氧化条件下,丁二烯嵌段会发生交联,从而使便度和粘度增加。SBS溶于环己烷、甲苯、苯、甲乙酮、醋酸乙酯、二氯乙烷,不溶于水、乙醇、溶剂汽油等。
    为了降低成本,改善性能,扩大应用范围,将SBS填充适当油品,做成充油SBS。
    SBS在胶粘剂中用途很多。可用于个产接触型胶粘剂,代替氯丁-酚醛型胶粘剂,生产sBS接技型胶粘剂,或与氯丁橡胶配合生产CR-SBS混合型接枝胶粘剂;制造普通鞋用胶、鞋用底涂剂;制造箱包专用胶;生产溶剂型压敏剂、热熔胶、热熔压敏胶;生产纸塑复膜胶粘剂、聚烯烃胶粘剂;生产建筑胶、建筑密封胶、CR-SBS密封胶、防水卷材专用胶;改性沥青等
    贮存于阴凉、通风、干燥的库房内.贮存期1年。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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