Zero stiffness method for fail-safe analysis

Q2 Engineering

INCAS Bulletin Pub Date : 2023-06-09 DOI:10.13111/2066-8201.2023.15.2.3

Raul Cormoş, C. Neagoe

引用次数: 0

Abstract

One of the major engineering tasks is to evaluate the structural behavior when one of the components has failed. In such cases it is necessary to carry out fail-safe analysis to evaluate if the structure can be used safely in loading conditions. Thus, fail-safe analysis is a vital and important task to properly validate the mechanical structure. The implementation of the fail-safe analysis using the finite element method is usually done by eliminating the given component from the finite element model and carrying out the given analysis. But when due to finite element modeling issues such an approach cannot be carried out without causing singularities in the model, another approach should be used to perform the fail-safe analysis. One such method, presented in this paper, is the zero stiffness method, which applies near-zero stiffness to the structural component that is removed from the finite element model. The zero stiffness method is used by applying close to zero values to the material and element properties, and thus reducing the load that is in the given structural component.

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故障安全分析的零刚度法

主要的工程任务之一是评估其中一个组件发生故障时的结构行为。在这种情况下，有必要进行故障安全分析，以评估结构是否可以在荷载条件下安全使用。因此，失效安全分析是正确验证机械结构的一项至关重要的任务。使用有限元方法进行故障安全分析通常是通过从有限元模型中删除给定的部件并进行给定的分析来完成的。但是，当由于有限元建模问题，无法在不引起模型奇异性的情况下执行这种方法时，应使用另一种方法来执行故障安全分析。本文提出的一种方法是零刚度法，它将接近零的刚度应用于从有限元模型中删除的结构构件。零刚度法是通过对材料和元件特性应用接近零值来使用的，从而减少给定结构构件中的载荷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

INCAS Bulletin Engineering-Aerospace Engineering

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： INCAS BULLETIN is a scientific quartely journal published by INCAS – National Institute for Aerospace Research “Elie Carafoli” (under the aegis of The Romanian Academy) Its current focus is the aerospace field, covering fluid mechanics, aerodynamics, flight theory, aeroelasticity, structures, applied control, mechatronics, experimental aerodynamics, computational methods. All submitted papers are peer-reviewed. The journal will publish reports and short research original papers of substance. Unique features distinguishing this journal: R & D reports in aerospace sciences in Romania The INCAS BULLETIN of the National Institute for Aerospace Research "Elie Carafoli" includes the following sections: 1) FULL PAPERS. -Strength of materials, elasticity, plasticity, aeroelasticity, static and dynamic analysis of structures, vibrations and impact. -Systems, mechatronics and control in aerospace. -Materials and tribology. -Kinematics and dynamics of mechanisms, friction, lubrication. -Measurement technique. -Aeroacoustics, ventilation, wind motors. -Management in Aerospace Activities. 2) TECHNICAL-SCIENTIFIC NOTES and REPORTS. Includes: case studies, technical-scientific notes and reports on published areas. 3) INCAS NEWS. Promote and emphasise INCAS technical base and achievements. 4) BOOK REVIEWS.