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- plastic shearing band 塑性剪切带
- Good bonds are always accompanied by surface extension, that is, plastic shear strain. 良好的键合总伴有表面延伸即塑性切向形变。
- The characterless zone on the fracture is the shear band instead of fracture surface of shear crack. 断口上的无特征区是剪切带,而不是剪切裂纹断口;
- TEM observation showed that the center of the adiabatic shear band (ASB) was composed of recrystallized nano-grains (about 30-70 nm in diameter). TEM观察表明绝热剪切带(ASB)中心区域由30-70纳米的等轴晶组成。
- Non-uniform shear dilatancy of rock specimen due to plastic shear strain localization is analyzed considering strain gradient effect. 摘要采用梯度塑性理论,对岩样剪应变局部化引起的扩容进行了理论分析。
- Peak strength, mechanical behavior, and pattern of shear band (SB) of anisotropic jointed rock specimen were modeled by FLAC. 摘要采用FLAC模拟了节理倾角对各向异性岩样峰值强度、力学行为及剪切带图案的影响。
- The formation mechanism of adiabatic shear band(ASB) produced by high speed penetration in 30MnCrNiMoB low alloy steel was studied. 研究了30MnCrNiMoB低合金钢在穿甲弹冲击下绝热剪切带(ASB)的形成机制。
- The findings show that,in course of serrated chip forming,the deforming material went through the both deforming stages of the plastic shear deformation and the local shear slip. 研究结果表明,在锯齿形切屑的形成过程中,变形材料经历了塑性剪切变形和集中剪切滑移两个变形过程。
- In this paper,the TEM research results on the rnicrcotructure of adia- batic shear band(ASB)in various metallic material have been reviewed. 本文总结了金属材料中绝热剪切带微观结构的透射电子显微(TEM)研究成果,其主要内容涉及以下几个方面:绝热剪切带微观组织特征;
- The development of shear band was researched by analyzing the confining pressure-time history, volumetric curve and displacement field of PFC model. 通过分析围压-时步曲线、体变曲线和不同阶段的颗粒位移场的变化规律,研究了剪切带的形成与发展规律。
- The mechanism of formation of shear band in cohesionless soils is presented and verified by a fully coupled FEM procedure. 提出了无黏性土中剪切带的形成机理,并利用耦合的有限元数值分析加以验证。
- The existence of adiabatic shear band and the crack caused by the band are important features in dynamic torsion moment tests. 绝热剪切带的出现和由它引起的裂纹是动态扭矩试验时的重要特征。
- On the macroscopic scale, the elastic modulus and the plastic parameters for both pore collapse and plastic shearing processes are expressed as functions of water saturation degree. 在宏观尺度上,弹性模量和塑性参数,包括对塑性孔隙塌陷机理和塑性剪切机理,被表达成水饱和度的函数。
- The experimental results suggest that the chalk behavior can be modeled in terms of elastoplastic model with two plastic deformation mechanisms:plastic compaction(pore collapse) and plastic shearing. 白垩是一种典型的多孔岩石,三轴试验研究成果表明白垩具有2种塑性力学机理:塑性压缩(孔隙坍塌)和剪切破坏。
- W-Ni-Mn alloy is easier to come into being adiabatic shear band(ASB) than the conventional tungsten heavy alloy,and has higher adiabatic shear sensitivity. 可见90W-Ni-Mn合金较传统钨合金更易出现剪切带,具有更高的绝热剪切敏感性。
- The fragments contained adiabatic shear band (ASB) in Ti 6Al 4V and AISI 6140 steel were studied by scanning electron microscope (SEM) and transmission electron microscope(TEM). 对含有约热剪切带(ASB)的TC4钛合金及40Cr钢破片作了扫描电镜(SEM)和透射电镜(TEM)分析。
- Microstructure and microhardness of adiabatic shear band(ASB) and those near ASB in medium carbon Cr-Ni-Mo-V ultra-high strength low alloy steel plate have been investigated. 测量了中碳Cr-Ni-Mo-V系低合金超高强度钢中绝热剪切带(ASB)及其周围金属的显微硬度,观察了其微观组织。
- 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。
- The microstructure, the shear strain and the micro-hardness around the sheared surface by plastic shearing of red copper bar under axial load were examined, and the sheared surfaces were observed by SEM. 研究了轴向压力作用下紫铜棒料塑性剪切分离面附近的微观组织形态、剪应变和硬度分布以及剪切分离面形貌。
- Deformation twins are observed in Q235B steel body, and adiabatic shear bands (ASB) in TA2 side are caused by plastic deformation under the high strain velocity, and at the same time ASBs play the role of crack source. 在Q235B钢基体中观察到形变孪晶,而在TA2侧观察到的绝热剪切带(ASBs),它是材料在高应变速率下塑性变形的结果,同时又是一种裂纹源;