Against an-engineering and background combinied with the mechanical theory of yield and fracture of ductile material in classical mechanics and fracture mechanics,this article deduced the microcosmic crack formation criteria(σ_F=σ_Y1-υ) of ductile material in stress triaxiality space by studying fracture stress field in root of notched bar made by the ductile material.
从特定的工程背景出发,结合经典力学和断裂力学对延性材料屈服和断裂解释的力学原理,通过对延性材料刻痕杆刻痕根部的断裂应力场分析,推导出了延性材料在应力三轴空间中微观裂纹的形成准则:σF=σY1-υ。
Combining with the mechanics theory of yield and fracture of metal in classical mechanics and fracture mechanics,crack formation criteria of ductile metal in stress triaxiality space is deduced by studying fracture stress field in root of notched bar made by ductile metal.
结合经典力学和断裂力学对金属屈服和断裂解释的力学原理,通过对延性金属刻痕杆刻痕根部断裂应力场分析,推导了延性金属在应力三轴空间的微观裂纹形成准则。
Combining mechanics theory of yield and fracture of ductile metal in classical strength theory with microcosmic fracture mechanics,and by studying fracture stress field in root of notched bar made of constructional steel,the author brought forward loci equation of constructional steel in stress triaxiality space.
结合古典强度理论和微观断裂力学对金属屈服和断裂解释的力学原理,通过对结构钢深槽刻痕杆刻痕根部微观断裂应力场的数值模拟,导出了结构钢在应力三轴空间的屈服轨迹方程。
Based on analysis of the grasping operation and workspace of the robotic hand, a new approach of synthesis for spherical five-bar metamorphic palm is presented in the dissertation.
本文从工程实际出发，运用球面机构运动几何学、最优化方法、计算机数值计算和CAE仿真技术等学科的理论成果，对球面五杆变胞机械手掌的机构尺寸综合进行了深入系统的研究，建立了球面五杆变胞机械手掌尺寸综合的模型，并编制了相应的优化综合程序。
Fracture Experimental and Generalized Yield of Notched Bar
结构钢刻痕杆断裂试验及广义强度理论验证
a single notch in a row of notches.
一排刻痕中的单个刻痕。
The quarter turn graduations on the sleeve, with the scribed line on the stem, provide for approximate flow measurement.
在套筒上四分之一转的刻度，以及阀杆上的刻痕，显示大约的流量测量。
To indicate(a trail) by marking trees with blazes.
在树上刻痕指示（道路）
To mark(a tree) with or as if with blazes.
在或似在（树上）刻痕
notch a surface to record something.
在表面刻痕以记录某事。
The glacier has scored the mountainside.
冰河在山腰留下刻痕。
He scored the tree with a nail.
他用钉子在树上刻痕。
He cut nicks in a stick to keep account of his score.
他在一根杖上刻痕记账。
Score the trees that are due to be felled
在待砍伐的树上刻痕做记号
an impression made from an etched plate.
用蚀刻板制作出的一种印痕。
double end scoring trimming and V-grooving machine
双端刻痕－裁边及开Ｖ型槽机
The Indians cut notches on a stick to keep count of numbers.
印第安人在棒上刻v形凹痕用来计数。
notch wood with a knife
用刀在木头上刻v形凹痕
To cut a nick or notch in.
切割痕迹刻一个缺口或小槽
Incising can achieve the same penetration advantages.
刻痕具有渗透度一致的好处。
He cut a notch in the stick with a sharp knife.
他用利刃在棒上刻了一个凹痕。
score the clay before firing it.
在烧烤以前在泥土上刻上痕。