Centro de recursos de SIMULIA

In recent years, concrete rail ties have received additional scrutiny with respect to their design criteria, manufacturing processes, in track performance and failure modes, owing to a number of railway track deterioration/failure events resulting from premature concrete tie failure. This paper employs a finite element analysis (FEA) framework to examine the key performance of pretensioned concrete crossties, including the pretension-released surface strain profile/transfer length, splitting/bursting propensity due to prestress transfer, and flexural loading and displacement capacities in rail seat positive and center negative bending modes.

Brochures

Abaqus has one the best solutions for tunneling and geotechnical analysis due to the great non-linear capability. The Abaqus/CAE interface is not so friendly to define a tunneling analysis. It has a lot of steps and uses Model Change to remove and add elements, to simulate excavation a construction step). It’s also difficult to change material properties during analysis. For non Abaqus users could be very hard to define a model. This paper shows a plug-in for Abaqus/CAE that helps the user to define a tunneling, excavation and temporary structures, with support facility and other geotechnical analysis. The paper explores the steps to define a geotechnical analysis and Abaqus/CAE capabilities. It also includes two examples of the plugin usage: a tunnel and a retaining wall.

Customer Papers

Over the last years the car manufacturers have been working intensively to improve the quality of the interiors since it is extremely important to the customer’s perception of the car. The numerical simulation can help the development of the interiors components design in order to guarantee better structural performances and to increase the quality of the products and therefore it is important to develop new calculation methodologies. In this paper, we will present two methodologies developed to improve the quality and efficiency of dashboards.

Customer Papers

FEA applications to conduct product development at Camoplast Solideal, Inc. have been implemented to understand better the rubber track behaviors. Numerous simulation studies have already been conducted on the rubber tracks to understand their strengths and limitations. An important study is now being pursued to the development of a tool that will help us understand better the wear mechanisms happening on the treads of our rubber tracks. This paper will describe the process of simulating the mechanism of wear that occur at the treads when a track is rolled over a surface.

Customer Papers

A multilink suspension offers a good balance between ride and handling performance and packaging space efficiency. It is also complex in design due to changes in link loading and compliance at high articulation travel. Therefore, geometric and material non-linearity behaviors are important to consider when designing these types of suspension components. Structural topology optimization has been applied in linear structural design for many years. It is a proven method for developing concept designs to meet design requirements. However, most techniques of this type in use do not comprehend geometric and material nonlinearities. This may lead to suboptimal designs for components where these effects are important, such as multilink suspensions.

Customer Papers

This article presents a numerical model of structural behavior of buckling restrained braces for the seismic protection of buildings. Such devices are usually installed in 2D frames as diagonal braces. Strong seismic horizontal excitations generate relevant interstory drifts and, hence, such braces experience shorteningelongation cycles; these members are designed to yield before the main frame, thus protecting it as kind of structural fuse.

Customer Papers

Traction is an important performance requirement for a tire and is the force that propels a vehicle forward. Accurate traction prediction has value in reducing development cycle time and improving mechanistic understanding of tire traction performance. On a rigid surface like a paved road, traction can be predicted using an appropriate tire-road friction model in a simulation of tire performance. However, traction on a deformable medium like soil, snow, water, etc. is a more complex phenomenon. Available traction on soil is the sum of the friction at the tire-soil interface and the amount of soil strength extracted by the tire to propel itself.

Customer Papers

This paper discusses the use of such advanced technique to solve the stent design problems. The paper would cover the essence of Finite Element Analysis, FE Model Parameterization and Optimization. Finite element modeling (FEM) and analysis with SIMULIA is used to estimate stress distribution in the stent. Various design parameters are identified for carrying out optimization using ISight. Different stent designs are generated using the FE model parameterization tools in MeshWorks MORPHER. Optimization based on parametric FE model is carried out to identify best design.

Customer Papers

The work presented demonstrates how Isight may be used to drive STAR-CCM+ and CATIA V5 for parametric optimization. In this example, carried out for the CFD group of a major US automotive OEM, a DOE study was performed with the aim of minimizing the pressure drop along an exhaust manifold. Geometric modifications were carried out automatically in CATIA V5, and passed to STAR-CCM+ for flow analysis.

Customer Papers

In this paper, the different “built-in” material models based on the isotropic, kinematic and combined isotropic-kinematic hardening theories available in Abaqus/Standard are evaluated for carbon steels. Through a number of case studies the performance of the different “built-in” models are compared for different load paths. The similarities and differences between the available “built-in” material models are presented. Monotonic, quasi-static cyclic and dynamic load paths are considered. The results presented in this study are expected to provide important insight to practicing engineers dealing with inelastic material characteristics.

Customer Papers

The wind-load response of braced and un-braced loading dock doors installed in industrial facilities in hurricane-prone areas was evaluated using Abaqus. Horizontal and combination of horizontal and vertical bracing designs were evaluated for a typical dock door made of steel slats sliding inside guiding rails and assembled to form a curtain rolled in a coil on the top of the opening. Analysis was performed using shell elements, hinged connections and selected boundary conditions. Result interpretation was based on three failure criteria: a conservative criterion based on the onset of plastic deformation that leads to the lowest critical winds, a 20% allowable plastic deformation criterion that leads to higher ratings and a slatpullout criterion that results in even higher wind ratings.

Customer Papers

Operational loads measurement and design optimization of a gold mine rail hauling system showing fatigue cracks

White Papers