This paper proposes a novel fully nonlinear refined beam element for pre-twisted structures undergoing large deformation and finite untwisting. The present model is constructed in the twisted basis to account effects of geometrical nonlinearity initial twist. Cross-sectional allowed by introducing Lagrange polynomials framework Carrera unified formulation. principle virtual work applied obtain ...

In the present article, geometrical nonlinear behavior of deployable booms undergoing large displacements and rotations is investigated. The triangular rollable collapsible boom made fiber-reinforced composite materials considered along with a metallic tape spring. mathematical model makes use higher-order 1D structural theories based on Carrera unified formulation, which allows description mod...

In the present research, a unified formulation for free vibration analysis of the bidirectional functionally graded conical and cylindrical shells and annular plates on elastic foundations is developed. To cover more individual cases and optimally tailored material properties, the material properties are assumed to vary in both the meridian/radial and transverse directions. The shell/plate is a...

We discuss the problem of associating grammars written in CUF DD93] with preference information of the sort which has proved useful in the development of large scale grammars like the Alvey Natural Language Tools Grammar GBCB89]. We show a way to embed a useful part of the functionality of the Xerox part of speech tagger Kup92] into the framework of CUF, developing a design for a version which ...

Laboratorio de Parasitología Molecular, Departamento de Microbiología, Facultad de Ciencias, Universidad Javeriana, Carrera 7 No. 43-82, Ed. Felix Restrepo, Of.111, Santafé de Bogotá, Colombia *Laboratorio de Parasitología, Instituto Nacional de Salud, Av. El Dorado con Carrera 50, Santafé de Bogotá, Colombia **Instituto de Genética, Facultad de Medicina, Universidad Javeriana, Carrera 7 No. 40...

In the present study, we investigated the effects of Citrus unshiu flower on regulatory mechanisms of cytokines and nitric oxide (NO) involved in immunological activity of RAW 264.7 macrophages. Our results indicated that ethyl acetate fraction of Citrus unshiu flower (CUF-EA) downregulated LPS-induced nitric oxide (NO) synthase (iNOS) and cyclooxygenase-2 (COX-2) expression, thereby reducing t...

Composite laminates are prone to delamination. Implementation of delamination in the Carrera Unified Formulation frame work using nine noded quadrilateral MITC9 element is discussed in this article. MITC9 element is devoid of shear locking and membrane locking. Delaminated as well as healthy structure is analysed for free mode vibration. The results from the present work are compared with the a...