It is found that with the variation in stress triaxiality from the big to the small,the fracture mechanism of materials is in the sequence of cleavage,traction fracture,shear fracture with cavity,plastic shear fracture and seam,and also that when the shear fracture with cavity takes .
通过研究几种合金钢在常规破坏试验和复合型断裂试验过程中的断裂现象,分析不同应力状态下的断裂试验结果,发现随应力三维度由大到小变化,材料的断裂形式依次为组织断裂、孔洞正断、孔洞剪断、塑性剪断及焊合。
Experimental results show that along with the increment of samples thickness,SP impact energy increases,fracture surface displays typical ductile fracture,and the punched part is full of half-sphereicl little bulge.
采用临界塑性断裂应变作为裂纹起裂判据,单位面积的能量耗散率作为裂纹扩展和失效判据的断裂模型,用有限元方法对SP压杆实验进行模拟,得到与实验结果比较相符的模拟结果。
The fracture surface displays the typical ductile fracture, and the outer surface of the half-sphere part cut off by the punch is full of bulgings around which there are micro cracks.
采用塑性断裂应变作为裂纹起裂判据,临界断裂变形能密度作为裂纹扩展判据的断裂模型,对SP压杆实验进行模拟,得到与实验结果比较相符的模拟结果。
A study on the plastic fracture region and its movement in overlying rock bed in mining stope
采场上覆岩层塑性断裂区域和移动规律研究
The final fracture pattern is plastic fracture and the fracture morphology of the sample is a dimple pattern.
5%的F+M双相钢;动态拉伸过程中,裂纹尖端的塑性区会萌生新的微裂纹,塑性区内的铁素体晶粒内部会产生"波状"滑移带;当裂纹扩展到马氏体岛时会改变方向绕过马氏体,扩展到铁素体晶粒时,以微孔相连的塑性方式使铁素体开裂;最终断裂以塑性断裂的形式发生,断口形貌为韧窝状。
elastic plastic fracture mechanics
弹性 塑性断裂力学
Method for Determining Elasto-plastic Fracture Toughness of Lce
冰的弹塑性断裂韧性测定方法的研究
The Research of J～* Integral in Elastic-Plastic Fracture Mechanics and Fracture Criterion for Mixed Mode Crack Propagation;
弹塑性断裂力学之J～*积分与复合型裂纹扩展断裂准则的研究
Investigation into Viscoelastic-Plastic Fracture Parameters of Asphalt Mixture
沥青混合料粘弹塑性断裂参数的研究
A study on the plastic fracture region and its movement in overlying rock bed in mining stope
采场上覆岩层塑性断裂区域和移动规律研究
Elastic-Plastic Fracture Analysis for Internal Axial Surface Half Elliptical Cracks in Oil & Gas Pipeline
油气管道内部轴向表面半椭圆裂纹弹塑性断裂分析
Combination of Analytical and Finite Element Methods for Plane Elastic-plastic Fracture Analysis and Its Applications to the Fracture of Concrete Structures;
平面弹塑性断裂分析的解析与有限元结合解法及其在混凝土断裂力学中的应用
In Situ Investigation on Plastic Deformation and Cracking of Metals under TEM/SEM;
金属塑性变形与断裂的TEM/SEM原位研究
Indentation-induced Plasticity,Damage and Fracture in Si and GaAs Single Crystals
压痕诱发GaAs和Si晶体塑性、损伤与断裂
Elastic-Plasticity Analysis of Ⅰ/Ⅱ Mixed Mode Crack and Probability Caculation of Fracture Failure
Ⅰ-Ⅱ型裂纹的弹塑性分析及断裂失效概率计算
Elastic-plastic fracture analysis of multiple-cracks with two-parameters under biaxial loads
双向荷载下多裂纹弹塑性双参数断裂分析
Fracture criterion for mixed mode crack of composites based on the crack tip plastic zone
基于裂尖塑性区的复合材料复合型裂纹断裂准则
Numerical Simulation on Ductile Farcture Considering Micro-Plastic Damage;
考虑材料微观塑性损伤的韧性断裂数值模拟
Study on the Fracture and Mechanical Properties of the Plastic Fiber Reinforced Concrete
塑钢纤维混凝土力学性能及断裂性能研究
Capable of undergoing continuous deformation without rupture or relaxation.
塑性的能够历经持续变形而不断裂或松弛的
Fracture and Finte Deformation of Strain Gradient Plasticity Theory;
应变梯度塑性理论断裂和大变形的研究
Research on Superplasticity and Fracture of Fine-grained TC21 Alloy;
TC21细晶钛合金超塑性变形行为与断裂特征
Investigation on Mechanism of Plastic Deformation and Fracture of Cylinders in Expanding Process;
圆壁管扩径加工的塑性成形机理及断裂分析