Congrès International d'Architecture Moderne

About: Congrès International d'Architecture Moderne is a based out in . It is known for research contribution in the topics: Boundary value problem & Jet (fluid). The organization has 393 authors who have published 403 publications receiving 4104 citations.

Estimation of Design Thermal Integrity

Abstract: Working capacity of machine parts in various possible operation conditions must be maintained by introduction of strength and durability margins (safety factors). These margins are necessary in view of possible random industrial deviations, unforeseen adverse combinations of loads, temperatures, and operating time at some regimes, and many other reasons. General principles for safety factor formation require analyzing the most probable ways for deviation of stresses, temperatures, and work duration or any other specific parameter, over its design value—on separateness or in aggregate with other ones. The possibility of creating a design of “equal strength” at non-isothermal loading is illustrated by the optimization of a turbomachine blade model non-uniformly heated along its length. The benefits of introducing a “weak link” that reaches destruction under overload before the entire system are discussed. It is shown that “equivalent” trials replicating the lifetime of the system can significantly accelerate the verification of the most stressed machine parts. The trials ensure a machine functioning with the same safety factors as under the work conditions, but during smaller duration. The cyclic durability margins for non-isothermal cyclic fatigue, taking into account influence of exposure at the maximum cycle temperature and asymmetric loading, are considered. Along with the evaluation of local strength and durability margins for the most stressed elements of a structure, computation methods, on a bearing ability of the structure “in whole,” are stated. Use of the determined safety factors is shown to be principally necessary for the reliable probabilistic estimation of details’ low-cycle fatigue (LCF). For this purpose, rational methods for generation of probabilistic-statistical strength and durability margins of machine parts, using results of the limited scope of sampling tests, are proposed.

Modelling lifetime data with multivariate Tweedie distribution

Abstract: This study aims to measure the dependence between individual lifetimes by applying multivariate Tweedie distribution to the lifetime data. Dependence between lifetimes incorporated in the mortality model is a new form of idea that gives significant impact on the risk of the annuity portfolio which is actually against the idea of standard actuarial methods that assumes independent between lifetimes. Hence, this paper applies Tweedie family distribution to the portfolio of lifetimes to induce the dependence between lives. Tweedie distribution is chosen since it contains symmetric and non-symmetric, as well as light-tailed and heavy-tailed distributions. Parameter estimation is modified in order to fit the Tweedie distribution to the data. This procedure is developed by using method of moments. In addition, the comparison stage is made to check for the adequacy between the observed mortality and expected mortality. Finally, the importance of including systematic mortality risk in the model is justified by th...

Creep and Durability at Non-stationary Loading and Heating

Abstract: In this chapter, the most validated experimental data for creep and durability of structural materials subjected to unsteady loading and heating are presented. The effect of heredity and adaptability on the material deformation hardening under uni- and multi-axial stress states is demonstrated. A vector theory of stabilized anisotropic-ray hardening (the SARH theory) of a material considering non-isothermal creep under arbitrary loadings, including non-proportional ones, is formulated. The theory is based on the experimentally justified concept of directed and stabilized nature of creep deformation hardening. It develops the results of previous publications on the subject. The design model reveals prominent features of non-steady creep, such as increase in rate of strain development after repeated loadings, spatial variation of the strain rate evolution at rotation of the stress tensor with or without unloading, subsequent stabilizing of the creep rate along a new direction, complete or partial creep inhibition under unloading, and aftereffect. A quasi-steady version of the theory takes into consideration the overall effect of rapid variation of operating regimes on creep evolution.

Neoliberalism, the Asian Financial Crisis, and Structural Adjustment Programs: The Case of Thailand

Abstract: As is the case with several other developing countries which grew rapidly in the 1980s and 1990s, Thailand was largely influenced by neoliberalism. This essay discusses neoliberalism, its influence on Thailand, and the role that neoliberalism played in the subsequent Asian financial crisis. Thailand’s swift economic rise through the mid-1990s, was followed by a severe economic and financial crisis that would spread to other countries in the region. Once the Asian financial crisis had commenced, the IMF intervened and introduced a set of policies which yielded some unintended consequences.