Structure nonlinear

Hales JM (2004) Chemical Structure-Nonlinear Optical Property Relationships for A Series of Two-Photon Absorbing Fluorene Molecules. CREOL and School of Optics, University of Central Florida, Orlando, PhD dissertation... 

Recently, a joint effort of material Laboratory at Wright Research and Development Center and Photonics Research Laboratory at SUNY at Buffalo has resulted in a comprehensive study of structure-nonlinear optical properties of a large number of systematically varied aromatic heterocyclic compounds involving fused ring benzimidazole and benzthiazole structures (10,30). 

Another directional influence on the short film is the nonlinear film. The nonlinear feature film that I refer to takes two forms the structural nonlinear film,... 

An alternative nonlinear static procedure was proposed by Aydinoglu (2003). The procedure, called Incremental Response Spectrum Analysis (IRSA) does not properly belong to the pushover methods. The procedure is displacement-based, it uses the equal displacement rule and the structure nonlinear behavior is modeled as piece-wise linear. The initial modes are computed and the elastic response spectrum for the initial structure is carried out. In the first stop the spectral ordinates are scaled to the formation of the first plastic hinge, which corresponds in the piece-wise linear capacity curve, to the first change of stiffness. The updated modal quantities are computed and additional spectral ordinates are computed up to the formation of the second plastic hinge. The procedure continues until the entire spectral ordinates are applied. The method does not require any transformation to an equivalent SDOE system. 

The aim of the introductory chapter by Schueller (Chapter 1) is to review some of the most relevant lessons learned for solving reliability problems in structural dynamics. The emphasis is given on studying the effects of dimensionality of a reliability problem as well as the effects of structural nonlinearities when applying different reliability... 

Spacone, Camata and Faggella (Chapter 21) underline the potential of nonhnear models and nonlinear procedures for seismic analysis of reinforced concrete frame structures. Nonlinear methods of analysis for seismic vulnerability assessment of existing structures are attracting increasing attention due to their capacity to predict the actual seismic behavior better than linear methods. Their inclusion in modern design... 

The two essential features of structural relaxation and structural recovery have been brought out by experiments (Figs. 2.6 and 2.7). They are (1) the structural-relaxation time depends not only on temperature T, but also on the instantaneous structure (nonlinearity) and (2) the time dependence of the structural-relaxation process is not a simple exponential function (non-exponentiality). Naturally, a viable model must incorporate these two features. There are two such models. The one formulated by Moynihan and co-workers [31] is based on the constructs of Tool [27] and Narayanaswamy [30] and is known as the TNM model. The other is the KAHR model developed by Kovacs and co-workers [32]. Both models account for nonlinearity and non-exponentiality and they are essentially equivalent. We shall describe only one of them, the TNM model and its variations. A review of the KAHR model can be found in [8]. 

Modern mechanical products such as aeronautical astronautic systems show the features as follows complex structure, nonlinear performance, limited samples, less information and strict demand of reliability and maintainability. All these features make the reliability and maintainability analysis is a huge challenge in precise and efficiency. Introducing the system engineer methodology into the mechanical products reliability analysis is an important and practical way. The traditional system reliability analysis methods such as FTA, reliability block diagram, Markovian approach and Petri nets are on the basis of history data. These methods can t work well and even could be inadequate in system analysis because of the complexity of structure and nonlinearity of their behaviors. For example, the space satellite is a system with complex structure. Its samples are very limited because of expensive cost, and its work environment is very complicate and uncertain. 

Fainleib A.M, Brovko O.O., Slinchenko E.A., Sergeeva L.M. Compatibilization of components in interpenetrating polymer networks. Influence of carbon fiber filler on formation kinetiks and phase structure. Nonlinear Optics. Quantum Optics, 32, 149-160 (2004). 

Treatment of structural nonlinearities within the framework of ideas presented in the preceding sections offers several conceptual challenges. For problems involving linear substmctures coupled through nonlinear elements, the fixed- and free-interface methods can be extended in a relatively easy manner. However, for problems involving globally distributed nonlinearities, the extensions... 

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