By using the Carrera Unified Formulation (CUF) and a total Lagrangian approach, the unified theory of beams including geometrical nonlinearities is introduced in this paper. According to CUF, kinematics of one-dimensional structures are formulated by employing an index notation and a generalized expansion of the primary variables by arbitrary cross-section functions. Namely, in this work, lowto...

This paper presents the numerical damage analysis of concrete structures using higher-order beam theories based on Carrera Unified Formulation (CUF). The constitutive relation is modeled continuum mechanics a modified Mazars model, in which both tensile and compressive softening behaviors are regularized with classical fracture energy methodology. An expression proposed to estimate characterist...

Abstract. The present work proposes a two-step global\local approach for the three-dimensional analysis of structures . In particular, first step makes use classical finite element modelling, based on 2D elements, whereas refined higher-order model Carrera Unified Formulation (CUF) is coupled with 3D peridynamics domain local analysis. solution from proposed method compared full FEM solution. o...

Peridynamics (PD) is a nonlocal continuum theory capable of handling fracture mechanisms with ease. However, its use involves high computational costs. On the other hand, Carrera Unified Formulation (CUF) allows one to one-dimensional high-order finite elements, resulting in excellent accuracy while improving efficiency. To address cost solving problems, coupling technique between these two the...

Abstract. The present work presents statistical results of numerical simulations to investigate the effect different void percentages on composite materials’ coefficient thermal expansion (CTE). A random distribution voids is simulated over Representative Volume Element (RVE) matrix. use a high-order beam model within framework Carrera Unified Formulation (CUF) leads Component Wise (CW) descrip...

In this study, the geometrically nonlinear behaviour caused by large displacements and rotations in cross sections of thin-walled composite beams subjected to axial loading is investigated. Newton–Raphson scheme an arc length method are used solution equations finite element determine mechanical effect. The Carrera-Unified formulation (CUF) solve nonlinear, low or high order kinematic refined s...

Abstract. The utilization of a fracture energy regularization technique, based on the crack band model, can effectively resolve issue mesh-size dependency in finite element modelling quasi-brittle structures. However, achieving accurate results requires proper estimation characteristic length method. This study presents practical calculation methods for length, particularly higher-order element...

This paper presents a static analysis of laminated composite doubly-curved shells using refined kinematic models with polynomial and non-polynomial functions recently introduced in the literature. To be specific, Maclaurin, trigonometric, exponential and zig-zag functions are employed. The employed refined models are based on the equivalent single layer theories. A simply supported shell is sub...

Abstract This paper presents a novel approach to developing 2D structural theories for composite shells. The proposed uses the capabilities of Carrera Unified Formulation (CUF) in conjunction with Axiomatic/Asymptotic Method (AAM) obtain best given layouts. Different cases are considered analyze influence factors such as boundary conditions, lamination, and thickness on accuracy model. paramete...

Abstract. A novel approach for free vibration analysis of train body structures is introduced by using the Carrera Unified Formulation (CUF) and Dynamic Stiffness Method (DSM). Higher-order kinematic fields are developed Formulation, which allows straightforward implementation any-order theory without need ad hoc formulations, in case beam theories. In particular, parallel axis theorem on basis...