Long Tian

Anyang Institute of Technology

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i-10 index

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Co-Authors

Hui Shi

Xi'an University of Architecture and Technology

Wuzhou Meng

Anyang Institute of Technology

Huichao Shi

University of California, Riverside

Jinquan Guo

Fuzhou University

Fei Li

Northwestern Polytechnical University

Wu Zhou Meng

Anyang Institute of Technology

Wei Zhang

University of Central Florida

H. Wang

Southwest Petroleum University

Liang Wang

Nanjing University of Aeronautics and Astronautics

Jin Guo

University of Science and Technology of China

Cooperative Institutions

Anyang Institute of Technology

Central South University

Xi'an University of Architecture and Technology

Zhejiang University

Fuzhou University

East China University of Science and Technology

Northwestern Polytechnical University

Northwestern Polytechnic University

Harbin Institute of Technology

Xiamen University

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Prediction of stress relaxation from creep data in terms of average creep rate

The Journal of Strain Analysis for Engineering Design (2014)

Jinquan Guo Wuzhou Meng Xiaotao Zheng Long Tian Huichao Shi

A new prediction model of stress relaxation from creep data in terms of average creep rate was established. An incremental calculation procedure has been further established to obtain stress relaxation data from creep data. To validate the effectiveness of the proposed conversion models, the predicted results were compared with those obtained by the previous continuum damage mechanics model as well as the stress relaxation experimental data using 1Cr10NiMoW2VNbN steel. Results showed that the creep–stress relaxation conversion model based on the average creep rate is better than that based on the continuum damage mechanics model because the former avoids the dispersion effect of fracture strain data, although the predicted results from the two models are both well in agreement with the experiment data.

Stress relaxation

Experimental data

10.1177/0309324714555151

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Citations (19)

Using Stress Relaxation Data to Predict Creep Behavior

Advanced materials research (2013)

Jin Guo Long Tian Hui Shi Wu Zhou Meng

An estimation method to predict creep performances of high temperature structural materials has been proposed. A Stress relaxation equation is obtained by fitting stress relaxation testing curves and modifying Tanaka-Ohba reloading stress relaxation constitutive equation. Based on the relationship between stress relaxation and creep, a unified prediction equation of creep is deduced. The method is to use the unified equation to derive creep strain rates or creep strain vs. time curves from stress relaxation measurements through some specified time increments. In order to validate the approach, the predicted results are compared to the experimental results of uni-axial isothermal creep tests conducted on 1Cr10NiMoW2VNbN steel. Good agreement between results of creep tests and the predicted results indicates that the developed method can be recommended in the creep behavior evaluation of high temperature materials.

Stress relaxation

Isothermal process

10.4028/www.scientific.net/amr.842.382

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Citations (3)

Total meshing area changing disciplinarian of work meshing pair of oscillating-teeth end-face harmonic gear

Fei Li Long Tian

Oscillating-teeth end-face harmonic gear is of an advanced drive wheel suitable for large power and high transmission ratio system. It has a broad prospect of application. The paper introduces transmission types of oscillating-teeth end-face harmonic gear, and analyses different transmission types of oscillating-teeth end-face harmonic gear's meshing process, summarizes evolution of total meshing area of oscillating-teeth end-face harmonic gear's work meshing pair. This research provides a theoretical basis for further discussion to bearing capacity of oscillating-teeth end-face harmonic gear's work meshing pair.

Harmonic

Harmonic Analysis

Power transmission

10.1109/emeit.2011.6023972

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Citations (1)

The Design of Role-Base Access Control in B/S Model

Journal of Anyang Institute of Technology (2012)

Long Tian

Based on B / S mode business system to the importance of the user permissions design,To analyse the current user rights management system structure design,focuses on the analysis of role based user privilege management,and through the University College Experimental teaching system user authority design of this paradigm,the paper expatiates on the design and implementation of role-based access control.

Management control system

Base (topology)

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Citations (0)

Study on finite element method of power working device of hydraulic excavator

Long Tian Wei Zhang H. Wang

In this paper, a type of dynamic hydraulic excavator working device as a research object, using finite element analysis method, establishes four kinds of finite element analysis models in the typical working conditions. By analyzing strength and rigidity of the dynamic structure, finds weak links of structure located in the boom back-end which is prone to stress concentration. By optimizing the structure, makes all maximum combined stress in these areas which easy produce fatigue invalidation is in the scope of allowable stress. Thereby the structural performance greatly is improved under the premise of ensuring structural weight basically unchanged.

Excavator

Rigidity (electromagnetism)

Research Object

10.1109/emeit.2011.6023106

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Citations (3)

Friction and Wear Characteristics of 38CrSi Alloy under Self-pair Rubbing Conditions

Materials for Mechanical Engineering (2008)

Long Tian

By using self-made dry sliding friction pin-disk tester the friction coefficient and wear rate changed with the speed and load of 38CrSi under self-pair rubbing conditions were investigated.With the help of SEM,the morphology of worn surfaces was observed and the friction and wear mechanism was evaluated.The results indicate that the friction coefficient decreased with the increase of load and sliding speed.The wear rate increased with the increase of load,and increased and then decreased with the increase of sliding speed,while the wear rate of common materials increased with the increase of sliding speed.The wear mechanisms are mainly abrasive wear and adhesive wear.

Rubbing

Adhesive wear

Coefficient of friction

Dry friction

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Bayesian Diagnostic Network Model for Sliding Plug Door

Advanced materials research (2011)

Hui Shi Long Tian Liang Wang

For constructing Bayesian diagnostic network model of complex system is a difficult course, we propose a Bayesian network model auto-construction method based on expert system knowledge base. Bayesian diagnostic network model was built by using the CM structure, and the diagnostic knowledge was organized by product structure tree. We have applied this method to fault diagnosis for sliding plug door, and tested our methodology on many examples of diagnostic problems of sliding plug door, which prove the efficiency of the Bayesian diagnostic network model and model-building method．

Dynamic Bayesian network

Diagnostic model

10.4028/www.scientific.net/amr.219-220.1496

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Citations (2)

Prediction Methodology of Creep Properties Using a Unified Model of Stress Relaxation

Advanced Science Letters (2013)

Jinquan Guo Wuzhou Meng Huichao Shi Long Tian

Stress relaxation

10.1166/asl.2013.4612

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Citations (0)