According to the problem that the concrete realization process of cloud manufacturing service mode was researched not enough, the process of manufacturing capability semantic modeling and intelligent service matching was studied in cloud manufacturing platform. Firstly, the properties and characteristics of manufacturing resources and demand were analyzed; then intelligent matching algorithm based on ontology semantic similarity was put forwarded, this algorithm comprehensive the advantage of semantic distance, properties, structure and examples four kinds of similarity algorithm, multistage matching, step by step refinements, realized the intelligent matching of supply and demand. Finally, the supply and demand intelligent matching process was build, based on analyzing the manufacturing resource and demand attributes and characteristics.

Aiming at the complex mechanical systems for the prediction of the fatigue limit load requirements, this paper examines the relationship among finite element analysis model and the performance models. And a finite element modeling method for fatigue analysis is proposed. The finite element model can support static, modal, fatigue, and multi-body dynamic response analysis in parallel and collaboration. This method helps improve the fatigue limit load analysis.

Predicting thermoelastic damping is crucial for the design of high Q MEMS devices. In the past, for the thermoelastic damping in microbeam resonators, Zener’s model (1937 Physical Review 52 230-5; 1938 Physical Review 53 90-9) and Lifshitz and Roukes’ model (2000 Physical Review B 61 5600-9) can give a reasonable prediction. However, the derivations of Zener’s model and Lifshitz and Roukes’ model are only suitable for a simple beam with no proof mass. The microbeam with a proof mass is a common element in many MEMS devices. In this paper, a general proof is presented that shows LR’s model is also valid for the TED in the microbeams with a proof mass. The derivation in this paper is based on a general case.

In this paper, combining the previous crankshaft fatigue test data with Crack-Modeling Technique, the threshold stress intensity range, ∆K th of crankshaft can be derived. The calculated threshold, ∆K th takes the effect of material properties and processing technology into account. Then, using the threshold, ∆K th , we can predict the fatigue limit load of the different types of crankshafts with the same material properties and processing technology by Crack-Modeling Technique. This study shows that the standard crack may be a good equivalent to the crankshaft stress concentration and the prediction of the crankshaft fatigue limit load is accurate.

Machinery industry changes with each passing day, asking for the more and more importance of the machinery industry performance. The innovative design needs to be used to tools designing for improving the work more efficiency. Take the wrench product designing as an example, this article analyzes the issue of the mechanical products innovation, applies the theories of innovation to a manual wrench innovative design and puts forward the thought of the wrench innovative design scheme, principles and the design process. In the end, the design scheme is evaluated, which indicates that the innovative design approach can be applied to a manual wrench design.