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- It is also useful for analyzing formation of interface waves and the adiabatic shear bands(ASB). 通过数值与理论计算对爆炸焊接碰撞角、界面距离等因素对应变率的影响进行了讨论。
- There are two type of adiabatic shear bands,namely,the deformed bands,and the transformed bands. 结果表明,在快速加载条件下材料中有绝热剪切带生成。
- The influences of confining pressure, end constraint, height of specimen and interface on networks of shear bands are investigated numerically. 研究了围压、端面约束、试件高度及界面特性对剪切带网络形成的影响。
- Electron diffraction patterns showed that the phase in adiabatic shear bands as crystal structure with some dislocation cells and dislocation snarl. 衍射证明绝热剪切带内组织为晶体结构,带内有位错胞和位错缠结;
- Research was conducted on characteristics of adiabatic shear bands (ASBs) in several steels by contained exploding cylinder technology. 研究了几种不同硬度和热导率的钢铁材料在约束爆破条件下的绝热剪切带特征。
- An effective technique of measuring the shear bands is put forward using digital photogrammetry and image correlation analysis. 提出了一种基于数字照相量测和图像相关性分析技术的土体剪切带识别方法。
- Microstructure evolution of shear bands originated from high strain,high strain rate deformation in electromagnetic pure iron DT4 had been examined. 结果表明:在压痕周围形成离散的剪切带,形变引起了块状非晶合金局部自由体积增加。
- The primary results were obtained by evaluation of army ballistic limit,and observation of impact craters,the number and location of adiabatic shear bands and cracks. 观察不同弹速下钢板出现的损伤形貌,弹坑周围裂纹和绝热剪切带的形成位置和数量,评定背面强度极限。
- 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;
- The adiabatic shear bands and microcracks all initiate near the inside wall and develop along the maximum shear stress curves to the outside wall of the cylinder. 破片金相分析表明,绝热剪切带和裂纹首先在圆管内壁附近产生,然后沿最大剪应力线向外壁扩展。
- 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。
- 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。
- 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。
- 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。