Buckling and Wrinkling of rectangular hollow sections curved in three-point-roll bending

Curved aluminium extrusions are applied in a wide range of industrial applications. Because extrusions are initially straight, an additional process is required to curve the product. Undesired wrinkling of the plate part at the inner radius is frequently observed during the curving process. Wrinkling has already been extensively studied for the...

Local buckling of aluminium and steel plates with multiple holes

This paper considers local buckling of perforated square aluminium plates. Plates of various slenderness with simply supported edges and subjected to uniaxial compression are studied using the finite element method. Different perforation patterns are investigated, from a single circular hole to 25 circular holes distributed over the plate. A...

Deformation of perforated aluminium plates inder in-plane compressive loading

Aluminium plates containing a single hole or multiple holes in a row are recently becoming very popular among architects and consultant engineers in many constructional applications, due to their reduced weight, as well as facilitating ventilation and light penetration of the buildings. However, there are still uncertainties concerning their...

Local buckling of fire-exposed aluminum members: New design model

Design models for local buckling of fire-exposed aluminum sections are currently lacking. Based on analyses with validated finite-element models, this paper investigates local buckling of extruded sections with stress-strain relationships representative for fire-exposed aluminum alloys. Due to the fact that these stress-strain relationships are...

Aluminium structures exposed to fire conditions. An overview

This paper gives an overview of the structural behaviour and design of aluminium structures exposed to fire conditions. Two design approaches are elaborated: the "traditional" approach that is mainly based on conventions and the fire safety engineering approach that is more based on physics. For the traditional approach, equations for the...

Local buckling of aluminium structures exposed to fire. Part 2: Finite element models

A test series was carried out and reported in a corresponding paper on slender aluminium alloy sections, loaded in compression at elevated temperature. This paper gives the results of simulations of these tests with a finite element model. For this purpose, a novel constitutive model for fire exposed aluminium alloys is used. The critical...

Local buckling of aluminium structures exposed to fire. Part 1: Tests

This paper describes an experimental investigation into local buckling of compressed aluminium alloy sections at elevated temperatures. Stress-strain relationships are derived based on uniaxial tensile tests. A special test set-up with a furnace is developed to test slender square hollow sections and angular sections in compression. The results...

Numerical simulation of lateral-torsional buckling of coped girders

The lateral torsional buckling resistance of girders depends on the support conditions. In floor structures for buildings, coped girders are often used. A numerical model was developed to research the influence of copes on lateral buckling resistance. The model is successfully validated with tests. This paper describes the background of the...

Effect of local buckling on burst pressure

Rupture of the pipe wall and inadmissible deformations are the two basic failure modes that can he distinguished in pipelines. Rupture can be the result of (a) the fact that the experienced strains exceed the strain capacity of the pipe wall, including less ductile zones in and near the weids and (b) high cycle and/or low cycle fatigue loading....