检索结果-内蒙古大学图书馆

2nd International Symposium on Application of Materials science and Energy Materials, SAMSE 2018

作者： Wang, Hongbo Yan, Hao Yan, Yonggan Li, Yungui Niu, Baoshan Liu, Meng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University China Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of Education Yanshan University China Academy for Engineering and Technology Fudan University Shanghai China

This paper constructs a man-machine integrated no-load static model considering the self-balancing of the mechanism, obtains the mapping relationship among joint variable, no-load torque, measured torque and end-force of the patient. According to the damping control strategy, the end force and speed mapping function planning is completed. The joint angular velocities based on the kinematic inverse solution are calculated, which are important parameter of man-machine coupling motion. © Published under licence by IOP Publishing Ltd.

关键词： Balancing

来源：评论

学校读者我要写书评

暂无评论

Cyclic Hardening/Softening of a TRIP Duplex Stainless Steel 13th

Cyclic Hardening/Softening of a TRIP Duplex Stainless Steel

引用

13th International Conference on the technology of Plasticity, ICTP 2021

作者： Jin, Miao Chen, Lei Zou, Zongyuan Hao, Shuo Li, Qun Zhao, Shiyan Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao066004 China

ISBN: (纸本)9783030753801

Recently, a series of duplex stainless steels (DSSs) have been developed by replacing Ni–Mo with Mn–N, which makes DSS more economical and produces TRIP effect with higher strength and plasticity. In this work, the mechanical properties of a TRIP-assisted DSS under monotonic and cyclic loading conditions were studied and the micro-structure under cyclic loading was analyzed by transmission electron microscopy (TEM). The test steel exhibits enhanced mechanical properties and a typical "three-stages" hardening characteristic due to TRIP effect under monotonic loading conditions. Cyclic hardening/softening characteristics of the test steel are affected by strain amplitude and the number of cycles. With smaller strain amplitude, cyclic hardening occurs first, and then shifts to cyclic softening and gradually trends to stabilization. With larger strain amplitude, after initial rapidly cyclic hardening, the test steel still changes to cyclic softening, however, no stabilization occurs until failure. The dislocation walls in ferrite during cyclic deformation are responsible for the overall cyclic softening of the test steel;While austenite produces Ε martensite transformation at larger strain amplitude, which suppresses the cyclic softening, so that with an increase in strain amplitude the cyclic softening rate increases rapidly, followed by a slow increase and a final decrease. © 2021, The Minerals, Metals & Materials Society.

关键词： High resolution transmission electron microscopy

来源：评论

学校读者我要写书评

暂无评论

Analysis of thin-walled shells with inner ribs formed by inner spinning technology

Analysis of thin-walled shells with inner ribs formed by inn...

引用

作者： Wang, Z. Ma, S. Education Ministry Key Laboratory of Advanced Forging and Stamping Science and Technology College of Mechanical Engineering Yanshan University Qinhuangdao Hebei066004 China Special Material and Technic Institution of Aerospace Beijing100074 China

This study analysed the formation of thin-walled shells with inner reinforcing ribs formed by conventional spinning technology through the design of three different blanks. Various factors and processing parameters, which affected the formation of the product, were studied. It was discovered that the spinning times were influenced by the expansion ratios and the inner ring reinforcing ribs. The impacts of spindle speed and spinning roller radius on the formation of the thin-walled shells with inner ribs were found to be identical. The specimens formed by the inner spinning technology exhibited two kinds of failure modes, which are described and explained. © W. S. Maney & Son Ltd 2015.

关键词： Shells (structures)

来源：评论

学校读者我要写书评

暂无评论

Investigation on the Microstructures and Tensile Properties of TA15 Titanium Alloy Thick-Wall Parts Formed by Laser Rapid Forming Process

Investigation on the Microstructures and Tensile Properties ...

引用

2012 International Conference on Advances in Materials science and Engineering(AMSE 2012)

作者： Mingzhe Xi Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China

TA15 titanium alloy thick-wall parts have been deposited by Laser rapid forming(LRF) *** this paper, a new overlap method between two adjacent laser tracks has been used to deposit the thick-wall titanium *** showed that the LRFed thick-wall titanium part was good in shape by using the new overlap *** microstructure of the LRFed titanium alloy primarily consists of columnar prior-beta grain, which is perpendicular to the substrate resulting from directionally *** also could be observed that the size of alpha phase increased with increasing laser power and decreasing scanning *** properties of LRFed titanium was slightly lower than that of the wrought annealed TA15 titanium alloy, after the heat-treatment of 940℃/1h/AC, the heat-treated titanium alloy showed good tensile properties which were equivalent to that of the wrought annealed TA15 titanium alloy.

关键词： Laser rapid forming TA15 titanium alloy Microstructure Tensile properties

来源：评论

学校读者我要写书评

暂无评论

Numerical Simulation and Analysis to the behavior of Inner Hole Defect of Integral Top Cover for Pressure Vessel

Numerical Simulation and Analysis to the behavior of Inner H...

引用

2013 2nd International Conference on Manufacture Engineering,Quality and Production System(ICMEQP 2013)

作者： Zhaoqing Yu Shaomin Nie Shaoyin Qi Rongsheng Qi Xingang Liu Miao Jin Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China

The integral top cover for nuclear reactor pressure vessel is an important force component in the pressure vessel. It works under the HPHT and radiation long time, which increases forging difficultly and needs extremely high quality. Due to the effect of bi-directional tensile stress in spherical part during the shape forming stage of the integral top cover, it is easy to make holes and other defects of the blank extend. Then, it is necessary to study the behavior of the inner hole defect of integral top cover. This paper, by numerical simulation technology, concrete analyses the volume of the hole defect, the size of the hole defect and variation of the hole edges in the stress-strain fields during the shape forming stage of the integral top cover. It researches the control scope of the original size of blank holes when the integral top cover forging meet the requirements of the flaw detection. Research results show that, according to the requirements of volume and maximum size permissible value, the diameter of holes in the integral top cover blank should be respectively less than 1.8 mm, 1.5 mm.

关键词： Integral top cover Hole defect Numerical simulation analysis Permissible value

来源：评论

学校读者我要写书评

暂无评论

Comfort degree of patients' rehabilitation training based on DSmT theory 2

Comfort degree of patients' rehabilitation training based on...

引用

2nd International Symposium on Application of Materials science and Energy Materials, SAMSE 2018

作者： Wang, Hongbo Yan, Hao Niu, Baoshan Wang, Xincheng Li, Yafeng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education Yanshan University Qinhuangdao China Academy for Engineering and Technology Fudan University Shanghai China

This paper aims to solve the problem that most rehabilitation robots lack to integrate their physiological functions and psychological states into closed controlling loop in rehabilitation training of stroke patients. The application of fusion technology of multi-electromechanical sensor signal and DSmT signal is used to achieve patients' comfort judgement. Mean value and variance are used to extract physiological information such as heart rate, temperature and skin resistance. Sensor information of fusion technology of rehabilitation robot based on classical DSmT theory can realize on-line diagnosis of multi-comfort degree of patients' coupling. © Published under licence by IOP Publishing Ltd.

关键词： Patient rehabilitation

来源：评论

学校读者我要写书评

暂无评论

Simulation on the Transient Thermal Stress Field of the Wall-Shaped Part Deposited by Laser Direct Metal Powder Deposition

Simulation on the Transient Thermal Stress Field of the Wall...

引用

2012 International Conference on Biomaterial and Bioengineering(ICBB 2012)

作者： Mingzhe Xi Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China

A thermo-kinetic model for the transient thermal stress field of the wall-shaped part produced using laser direct powder deposition process is developed. In case of numerical modeling, the capabilities of ANSYS parametric design language and the the ‘birth and death' element technique were employed. The distribution of the thermal stress of the wall-shaped part at different time was calculated by the model. Results show that during process, the X-direction thermal stress within top layer of the wall-shape part and that within the interior deposited layers of the wall-shape part was tensile stress and compressive stress, respectively. The deformation of the wall-shaped part and base plate was also calculated.

关键词： Finite element analysis Transient thermal stress field Laser direct powder deposition 316L stainless steel powder

来源：评论

学校读者我要写书评

暂无评论

Dynamics analysis and simulation of a new 6-DOF lower limb rehabilitation robot 2

Dynamics analysis and simulation of a new 6-DOF lower limb r...

引用

2nd International Symposium on Application of Materials science and Energy Materials, SAMSE 2018

作者： Wang, Hongbo Lin, Musong Yan, Yonggan Liu, Guowei Su, Bowen Zhao, Chaosheng Wang, Fuhao Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education Yanshan University Qinhuangdao China Academy for Engineering and Technology Fudan University Shanghai China

This paper proposes a new hybrid (parallel-serial) 6-DOF lower limb rehabilitation robot including two mechanical legs and an adjustable seat, which could train in sitting, lying and standing three postures. Each mechanical leg consists of hip joint, knee joint and ankle joint. The dynamics and DOF of the robot are analysed, and the result is verified by the software ADAMS. The result lay the foundation for prototype build in future. © Published under licence by IOP Publishing Ltd.

关键词： Joints (anatomy)

来源：评论

学校读者我要写书评

暂无评论

Finite element simulation and microstructure of two-pass inner spinning process of curved-generatrix cone cylindrical parts with annealing/quenching

引用

Journal of Central South University 2019年第12期26卷 3305-3314页

作者： HAO Zeng-liang YANG Zhe-yi) WEI Wei LIU Lei LUO Jun-ting LIU Jin-heng Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Construction Material Vocational and Technical College Qinhuangdao 066000China

A two-pass annealing/quenching internal spinning process with small-end rotations is proposed to form a curved generatrix conical thin-walled *** is,annealing at 360°C for 2 h followed by the 1st pass spinning,and finally quenching in ice water after holding for 1 h at 498°C followed by the 2nd pass *** finite element software is used to simulate the internal spinning process of the products formed under different forming *** distribution laws of spinning force,the stress and strain under different forming processes were compared and *** mechanical properties and microstructure of the products are subsequently *** results show that the strain and the residual stress in the skin area of the formed products under two-pass spinning process more uniform,and the hardness and the mechanical performance are *** microstructure of the products formed with the 0.15 mm thickness reduction at the 2nd pass is *** the second phase grain size distributed uniformly in the range of 36μ***,the second phase particles are broken seriously and the size distribution inhomogeneity is increased when the thickness reduction in the skin area is greater than 0.20 mm at the 2nd pass spinning process.

关键词： curved generatrix conical internal spinning process annealing/quenching small-end rotations finite element simulation

来源：评论

学校读者我要写书评

暂无评论

The deformation characteristics of hydro-forming of differential gear box for automobile

The deformation characteristics of hydro-forming of differen...

引用

作者： Huang, Wen Yu, Hai Bo Lu, Hong Qin, Si Ji National Engieering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao Hebei 066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao Hebei 066004 China

ISBN: (纸本)9783038351221

The hydroforming process of differential gear box for automobile under axial compressive load and internal bulging pressure was simulated and the load paths were optimized. The hydroforming process is divided into two steps. The deformation under different load paths was investigated using dynamic explicit finite element method. The distribution of equivalent strain and thickness was investigated as well. The simulation results show that the forming path for the first step is optimal when internal pressure changes linearly from 37MPa to 65MPa with the axial displacement. © (2014) Trans Tech Publications, Switzerland.

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：