Based on 3D nonlinear FE(finite element)analyses of T-stub steel connections of high strength friction grip bolt,this paper probes into the effects of factors,such as the pitch of bolts and the thicknesses of T-stub flange,column flange and web,on the initial connection stiffness of joints as well as the ductile failure and contact state of beam.
通过对高强螺栓T型钢连接节进行三维非线性有限元分析,研究和探讨了螺栓间距,T型钢翼缘、柱翼缘及柱腹板厚度等因素对于节点初始连接刚度、梁的延性破坏以及本身接触状态的影响。
Tensile,compression,torsion,and fine blanking tests of 45 steel were performed, and the stress triaxiality and ductile damage of each test are analyzed with FEM.
以45中碳钢为研究对象,进行了拉伸、压缩、扭转、精冲实验,并结合有限元对各实验过程中的应力三轴度和延性损伤进行了分析,归纳了金属材料的3种延性损伤机理:无空穴影响剪切损伤、剪切型空穴损伤和拉伸型空穴损伤。
Based on the continuum damage mechanics(CDM),a unified model of ductile damage evolution is proposed.
本文基于连续介质力学（ＣＤＭ），提出了延性损伤演化的统一模型。
In this paper, the plastic strain energy that a material absorbs in static loading is used to define the ductile damage variable of the material, which could overcome the limitations of the other definitions and describe all damage changes in the ductile damaging process.
采用材料在受力变形过程中耗散的塑性应变能定义材料的延性损伤变量,可以克服现有延性损伤变量定义的局限,完整描述材料在廷性损伤全过程中的损伤变化情况;实测方便,精度易于保证;还建立了相应的损伤演化方程和损伤材料的应力-应变本构方程,由其获得的损伤准则等价于第四强度理论。
Compared with polycrystalline Cu, the as-cast single crystal copper shows better plasticity and extensibility, and has a lower electricity resistance.
结果表明 :和多晶铜相比 ,单晶铜在铸态时具有良好的塑性和较低的电阻率 ,并具有优异的室温延展性 ,其延伸率可达 6 10 0 %以上 ;冷拉拔加工后单晶铜表现出更大的加工硬化现象 ,但采用合理的退火工艺可使其加工硬化得到缓解。
An Orthogonal Anisotropic Ductile Damage Model Applicable to Deep- drawing Forming Limits
一种适用于成形极限的正交异性延性损伤模型
The Mechanism of the Ischemic Reperfusion Injury-Delayed Onset Muscle Soreness;
缺血再灌注损伤—延迟性肌肉酸痛的产生机制
Ischemical Reperfusion Injury-A Possible Procedure In Delayed Onset Muscular Soreness(DOMS);
缺血再灌注损伤——延迟性肌肉酸痛的可能机制
Study on the change of bFGF in reticular formation of medulla oblongata after primary brain-stem injury;
原发性脑干损伤后延髓网状结构bFGF改变的研究
The Acupuncture Points Burns a Method to Delay Sex Muscle to Hurt the Athlete Restored of Influence
穴位灸法对运动员延迟性肌肉损伤恢复的影响
Effects and Mechanisms of Initial Damage on Ductile Fracture Initiation Toughness of Different Microstructures of Steel;
初始损伤对不同金属材料组织延性起裂韧性的影响及机理
Sevoflurane preconditioning induced delayed neuroprotection against focal cerebral ischemia in rats
七氟醚预处理对大鼠局灶性脑缺血再灌注损伤的延迟性保护作用
Research of Different Square Traditional Chinese Medicine Influencing Sport Postponement Muscle and Its Functional Mechanism;
不同复方中药对运动延迟性肌肉损伤的影响及其作用机制研究
The Fxperimental Study about the Quantitative EMG Signal Parameter of Delayed onset Muscle Damage of Rats after Eccentric Exercise;
离心运动后大鼠延迟性肌肉损伤肌电图定量参数的实验研究
Ultrastructural studies on reticular formation of medulla oblongata in the early stage of brain stem mechanical injury in rats.;
大鼠机械性脑干损伤早期延脑网状结构的超微病理研究
Compound traditional Chinese medicine and changes in serum index of exercise-induced muscle injury: A randomized controlled experiment
复方中药与延迟性肌肉损伤血清学指标的变化:随机对照实验
Noninvasive delayed limb ischemic preconditioning decreases cerebral ischemia-reperfusion injury in rats
无创性延迟肢体缺血预适应减轻大鼠脑缺血/再灌注损伤
Application of naloxone hydrochloride in the treatment of persisting coma after severe craniocerebral trauma
盐酸纳洛酮在重型颅脑损伤后迁延性昏迷治疗中的应用
Comparison of therapeutic effects between extended daily hemodialysis and extended daily hemofiltration for acute kidney injury after orthotopic cardiac transplantation
延长每日血液透析和延长每日血液滤过对原位心脏移植术后急性肾损伤的疗效比较
Experimental Study of Kidney Injury with Delayed Fluid Resuscitation after Severe Burn in Rats at High Altitude;
高原严重烧伤大鼠延迟复苏肾损伤的实验研究
mechanical injury
机械性损伤 以机械性暴力所致的损伤。
Analysis of Concrete Damage Mechanism and Critical Damage Characteristics;
混凝土损伤机理及临界损伤特性分析
Ultrasonographic diagnosis of small bowel injury after blunt trauma
超声诊断闭合性腹部损伤后小肠损伤