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JournalISSN: 1001-9669

Journal of Mechanical Strength 

Chinese Mechanical Engineering Society
About: Journal of Mechanical Strength is an academic journal. The journal publishes majorly in the area(s): Finite element method & Reliability (statistics). It has an ISSN identifier of 1001-9669. Over the lifetime, 819 publications have been published receiving 2013 citations.


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Journal Article
TL;DR: In this article, the basic principle of local approach is taking the "local parameter" of the stress concentration region as a characteristic parameter to describe the fatigue behavior and to establish the general S-N curves expressed by the correlate local parameters and the loading cycles N which lead to the prediction of fatigue life and strength of welded components possible.
Abstract: The local approach is one of the most important method developed in recent years for fatigue assessment of welded joints. The basic principle of local approach is taking the “local parameter" of the stress concentration region as a characteristic parameter to describe the fatigue behavior and to establish the general S—N curves expressed by the correlate local parameters and the loading cycles N which lead to the prediction of fatigue life and strength of welded components possible. The local approaches could effectively represent the practical fatigue performances of welded structures due to the inclusion of the local geometrical details of the welded joints. This method is recommended by the International Institute of Welding (IIW) and widely employed by various societies in Europe. Various local fatigue criteria for fatigue assessment are developed in recent years, such as notch stress intensity factor (N-SIF), equivalent stress intensity factor (E-SIF), critical distance method (CMD) which includes point method (PM), line method (LM), area method (AM) and volumetric method (VM). The principles, procedures and effect factors about the local approaches are discussed in this paper.

230 citations

Journal Article
TL;DR: In this paper, a hybrid probabilistic and non-probabilistic approach for structural reliability analysis was presented, through a successively construction of performance equations in two levels and correspondingly reliability analysis, the probability that a structure is reliable may be given.
Abstract: In most mechanical and structural systems, a certain amount of uncertainties exist in material and geometrical properties, applied loads, etc. These uncertainties must be taken into account reasonably when estimating the reliability of systems. The modeling of uncertainties may be either probabilistic when sufficient information is available, or non probabilistic convex models when available data are lack or limited. The structural reliability theories of probabilistic and the non probabilistic method based on interval analysis were briefly introduced. A hybrid probabilistic and non probabilistic approach for structural reliability analysis was presented. In our approach, through a successively construction of performance equations in two levels and correspondingly reliability analysis, the probability that a structure is reliable may be given. A practical example illustrated the application of the proposed theory. It is also shown that when available information about some parameters is lack, the probabilistic assumption may lead to under conservative results.

44 citations

Journal Article
TL;DR: In this article, the Hamilton principle was used to derive the freely vibration equation of a micro beam in the absence of damping, and the dependence of the resonant frequency on its size was analyzed.
Abstract: Many micro experiments have shown that the mechanical properties of materials at micro scale are size dependent. The vibration characteristic (mainly the resonant frequency) of a micro beam has been analyzed theoretically using couple stress theory (Cosserat theory). Based on the couple stress elasticity theory the freely vibration equation of a micro beam in the absence of damping is derived using the Hamilton principle. The dependence of the resonant frequency of a micro beam on its size is analyzed, and the results show that the resonant frequency will increase markedly when the thickness of the beam decreases to a value which is comparable to the material length scale parameter.

30 citations

Journal Article
TL;DR: In this article, a new method estimating the Weibull distribution model's parameters by combining least-sauares method and mean rank order is put forward, this method has very strong practicability and high precision.
Abstract: According to the question of model precision in mechanical equipment reliability life analysis,a new method estimating the Weibull distribution model's parameters by combining least-sauares method and mean rank order is put forward.The usual parameter-estimation methods have disadvantages such as man-made effect,low precision and discommodious use in site,but all of them have been effectively resolved by the method that put forward.When using least-sauares method to make parameter estimation of Weibull distribution,empirical distribution function is used as the benchmark to ascertain the life model and the lifetime model's precision is directly affected by its precision.The mean rank order estimating all rank order based on fault samples and ceasing samples to calculate the mean rank order,then putting mean rank order into approximate formula of middle rank to get empirical distribution function and the parameter precision is effectively improved by this.Thirty engines were selected to progress reliability life analysis,the result showed that this method has very strong practicability and high precision.

17 citations

Journal Article
TL;DR: In this paper, the derivation of residual stresses in thin films is considered and some measurements are introduced, and the Stoney formula and its extensions are discussed to calculate residual stresses.
Abstract: Residual stresses in thin films are always a major concern in micromachining technology. In design, fabrication and packaging processes of MEMS, residual stresses all through operate as an influential factor. The derivation of residual stresses in thin films is considered in this paper, and some measurements are introduced. The Stoney formula and its extensions, are discussed to calculate residual stresses in thin films. Residual stresses affect mechanical behavior of microstructures strongly, such as buckling and adhesion of microbeams.

17 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
201510
201418
201323
201233
201143
201059