A new load transfer index () with considering six degrees of freedom and its application in structural design and analysis
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[1] University of Manitoba
University of Manitoba
Canadá
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- Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 46, Nº. 4, 2018, págs. 410-424
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Load paths analysis is important in design process of load bearing structures. U* index was introduced as the indicator of load paths based on finite element analysis. However, the U* index was only formulated based on three translational degrees of freedom (DOFs) without considering the rotational DOFs. Hence, the U* index cannot be used together with plate and shell theories, which are very important in engineering computations of thin-walled structures. A coupling issue in finite element analysis is that shell elements which are governed by plate and shell theories are invalid for U* calculations. This paper proposed a new load transfer index () with considering both translational and rotational DOFs (i.e. six DOFs). To demonstrate the effectiveness of the new index in structural design and analysis, a case study was performed to a complex thin-walled structure. The stiffness to mass ratio of the sample structure is raised by 18.3% based on the load transfer analysis using the new index.
