1) localized instability
集中性失稳
1.
The endochronic constitutive equations under uniaxial and biaxial tensile stress state are given to analyse diffuse instability and localized instability during the sheet forming.
引入简单加载过程中应力、应变各主向及其增量成比例的特性 ,推导出单向和双向拉伸应力状态下的内时本构方程 ,据此分析了板料成形过程中的分散性失稳和集中性失稳问题 。
2.
The endochronic constitutive equations under uniaxial and biaxial tensile stress state are given to analyze diffuse instability and localized instability.
推导出单向和双向拉伸应力状态下的内时本构方程 ,据此分析了分散性失稳和集中性失稳 。
2) localized necking
集中性失稳
1.
The reason of the "double-necking" which appeared in the tensile test for cold-rolled sheet St14 is studied in this article through the diffuse necking and localized necking theory of tensile test, with the appearance of the necking fracture in the specimen.
针对冷轧薄钢板St14在单向拉伸试验中出现的试样"双缩颈"现象,结合观察试样缩颈断裂处的形态,引用薄板单向拉伸分散性失稳和集中性失稳理论对其做出合理解释。
2.
This paper cites the diffuse necking and localized necking theory of tensile testing to explain the “double-necking” logically which appeared in the tensile testing of cold-rolled sheet Stl4 BX STEEL produced,combining with the configuration in the necking fracture of the specimen.
针对本钢生产的冷轧薄板 St14在单向拉仲试验中出现的试样“双缩颈”现象,结合观察试样缩颈断裂处的形态,引用薄板单向拉伸分散性失稳和集中性失稳理论对其做出合理解释。
3) HILL localized necking theory
HILL集中失稳理论
4) elastic instability
弹性失稳
1.
The instability includes elastic instability and plastic instability in open-die extrusion.
长轴类零件开式挤压失稳包括弹性失稳和塑性失稳。
2.
The elastic instability of a gel cylinder was researched with classical elastic theory.
采用弹性理论研究了圆柱形胶体在表面张力作用下的弹性失稳问题;利用能量泛函变分的方法导出了发生弹性失稳的非经典边界条件,得到了失稳的判据方程。
5) plastic instability
塑性失稳
1.
The instability includes elastic instability and plastic instability in open-die extrusion.
长轴类零件开式挤压失稳包括弹性失稳和塑性失稳。
2.
This paper analyzes the plastic flow and instability of the damaged materials with strain hardening and strain-rate sensitivity under uniaxial tension, and discusses the relationship between the plastic instability and strain to fracture and parameter of material n, m.
讨论另外两种实验情况下,塑性失稳应变,断裂应变与材料参数n,m的关系,同时说明了等应变速率单向拉伸可简化为这两种实验的复合。
3.
The effect of micro-damage on the plastic instability in uniaxial tensile testing has been studied in this paper.
本文研究了单轴静拉伸条件下微孔损伤对塑性失稳的影响。
6) plastic collapse
塑性失稳
1.
in reference [1],between tearing instability stress and plastic collapse stress under simple loading for circumferential throughwall crack of pipes, a new approximate relation between them under combined loading is established.
本文依据文献［１］所建立的管道环向裂纹在简单加载下的撕裂失稳与塑性失稳应力的近似关系式，构造了复合加载下撕裂失稳与塑性失稳应力的工程近似关系表达式：并针对４种材料、４０种裂纹构形工况，进行了失稳评定计算：经与文献［２］提出的精细分析方法所得的结果对比，一般偏离不超过４％，满足了工程评定要求，鉴于ＬＢＢ稳定性分析的工程估算方法易于被非专业人员掌握和接受，并能省时省力，预计将能对ＬＢＢ评估技术的发展起重要的作用。
2.
In this paper, authors established the approximate relative expression of tearing instability stress and plastic collapse stress under simple loading for circumferential throughwall cracks in pipes.
本文建立了管道环向贯穿裂纹在简单加载下撕裂失稳与塑性失稳应力的近似关系式，研究结果表明：对于管道环向贯穿裂纹，其在简单拉伸下的撕裂失稳与塑性失稳的应力比，和在纯弯加载下的斯裂失稳与塑性失稳的应力比，近似相等，并已通过实际裂纹构形的具体评定计算，得到证实。
补充资料：裂纹失稳扩展
分子式：
CAS号：
性质：材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
CAS号：
性质：材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条