Papers by Author: Guang Yu Mu

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Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: By the investigation of the 400°C low cycle fatigue behavior of 4 kinds of notched cylindrical specimens made 2.25Cr-1Mo stee1. The high temperature low cycle fatigue life was evaluated by the criterons of equivalent range. The results show that equivalent criterion for evaluating high temperature low cycle fatigue life has its experimental and theoretical foundation, but further investigation is still needed.
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Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: The low cycle fatigue behavior was experimentally studied with the 3-dimension notched LD8 aluminum alloy specimens at 300°C. The 3- dimension stress-strain responses of specimens were calculated by means of the program ADINA. The multiaxial fatigue life prediction was carried out according to von Mises’s equivalent theory. The results from the prediction showed that the equivalent strain range can be served as the valid mechanics for predicting multiaxial high temperature and low cyclic fatigue life.
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Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: The high temperature & low cycle fatigue were experimentally studied with the 3-dimension notched 2.25Cr—1Mo steel specimens. The 3-dimension stress-strain responses of specimens were calculated by means of the program ADINA. The prediction method of 3-dimension fatigue life was discussed according to the theory of high temperature strength. The results of experiments and calculations showed that the equivalent strain range can be served as the valid mechanics for predicting fatigue life.
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Authors: Dong Juan Xue, Tian Yi Gao, Ying Pan, Guang Yu Mu
Abstract: To improve the knowledge management during product design process, a new model of knowledge composition and knowledge activity is constructed within or between organizations and persons. And based on the analysis of knowledge acquisition, transfer and innovation, the strategy for the implement of knowledge management project is proposed. At last the functions and structures of a software system are provided that supporting the knowledge management for product design in an manufacturing enterprise.
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Authors: Dong Juan Xue, Tian Yi Gao, Guang Yu Mu, Ying Pan
Abstract: The correct inventory strategy is important to control reasonable inventory within manufacturing enterprises. And a new material inventory strategy is proposed based on the classification scheme according to the prosperities. First the material inventory styles are classified. Then a decision tree model is defined based on inventory classification result. The value of the node is decided by Fuzzy Neural Network if multi-attribute decision is needed and material inventory strategy can be decided with the classification tree and inventory strategy table. In the end, the implementation of the model in a manufacturing enterprise resource plan system is presented.
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Authors: Guo Dong Gao, Wen Xiao Zhang, Jiang Hua Sui, Guang Yu Mu
Abstract: In order to solve the fault diagnosis problem of diesel engine, Elman neural network (ENN) was applied to build a fault diagnosis model of diesel engine. The training algorithm is in introduced and at the same time, the process of diesel engine fault diagnosis is also expatiated. The diagnosis results indicate the reliability. So a contingent fault of diesel engine can be identified effectively.
1506
Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: The crack propagation law of 2.25Cr-1Mo steel with notched cylinder was researched under high temperature low cycle fatigue. The crack propagation life was viewed by fatigue experiment and the equivalent stress-strain on the crack tip was calculated by the ANSYS. The equivalent J-integral range which was computed by equivalent elastic and plastic strain ranges were employed to denote the fatigue crack propagation rate. The results showed that crack propagation law of this material under complex stress state can be characterized by equivalent J-integral ranges and the relation between da/dN and ΔJf is not influenced by the type of notch and the load strain range.
1422
Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: Three dimension temperature fields and stress-strain fields of the 6110-type diesel engine piston were analyzed by using the program ANSYS. The simulating tests of crack propagation under high temperature low cycle fatigue were carried out with pre-crack notched specimens. According to the theory of high temperature strength and fracture, the equivalent J-integral range ΔJf were induced to predict the surplus fatigue life of diesel engine piston. It was concluded that this approach is suitable and provides valuable reference for designers of diesel engine.
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Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: In this paper, the tests of the thermo-mechanical fatigue of the material, cut from a coke tower were performed. The tower made of 20G has been in service for 20 years. Then, we calculated the temperature and stress-strain. The results showed that the tower can be in service for another four years.
2319
Authors: Wen Xiao Zhang, Guo Dong Gao, Guang Yu Mu
Abstract: The in-phase and out-of-phase thermal fatigue of aluminum alloy were experimentally studied. The fatigue life was evaluated analytically by using the elastic-plastic fracture mechanics method (mainly J integral). The results of experiments and calculations showed that the life of out-of-phase fatigue was longer than that of in-phase fatigue within the same strain range. This is the same as the results of other materials such as medium and low carbon steel. On the other hand, the predicted life was consistent with experimental results. This suggests that J integral as a mechanics parameter for characterizing the thermal fatigue strength of aluminum alloy and the calculation method developed here is efficient. A parameter ΔW was proposed from energy aspect to characterize the capacity of crack propagation. The in-phase thermal fatigue life was the same as the out-of-phase thermal fatigue life for identical ΔW values.
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