Centro de recursos de SIMULIA

The ability to accurately model welding processes in order to predict residual stresses and distortions is becoming increasingly important in the engineering industry. Abaqus can be used to model the welding process but this has been found to be considerably time consuming and requires a large number of assumptions to be made. Virtual Fabrication Technology is an analysis software suite that is designed to allow Abaqus to accurately model complex welding procedures. It was developed by the Battelle Memorial Institute in conjunction with Caterpillar Incorporated in the USA. The software is centred on a Graphical User Interface that is used to assign welding paths, parameters and material properties to FE models that have been imported from Abaqus/CAE.

Customer Papers

For inclusion of inertia effects of moving fluid columns or strings into structural mechanics simulations, a combined finite-element modelling scheme is proposed in ABAQUS. The concept has been realized in the form of user subroutines (UEL) of beam type. These can be coupled to existing standard (e.g., Euler-Bernoulli or Timoshenko) elements . The proposed Coriolis elements can be applied for, e.g., prediction of loads from high-speed flows and phase shifts of oscillating fluid-conveying pipe systems with arbitrary complex designs. The modelling scheme also allows a flexible coupling to shell or solid finite-element models.

Customer Papers

The objective of this work was to minimize the mass of a mechanism for locking aircraft landing gear doors whilst ensuring stresses did not exceed the material allowable stress. A typical metallic locking mechanism comprises a frame attached to the aircraft structure and supporting a number of linkages through pivot pins. These linkages transfer translational motion of a hydraulic actuator into rotation of a hook, which engages with the door. The structure was modelled with Abaqus/Standard as a non-linear static analysis involving contact, but with no material or geometric non-linearity.

Customer Papers

Skid a full vehicle against a curb in lateral and longitudinal direction are two out of several tests to proof the strength of a suspension. Knowing the internal forces acting on suspension components during such an event is extremely important for being able to dimension safety critical parts correctly. Measuring these loads is an elaborate task, because the use of wheel force transducers is not possible due the risk of damaging them. It is necessary to apply strain gauges and force cells instead. Furthermore an attempt will be made to transfer the full vehicle impact tests / simulations to suspension level testing. Both a suspension impact rig as well as a simple static suspension strength rig will be set up in the real and the virtual world.

Customer Papers

Heat treatment processes, particularly quenching, are essential to improve mechanical properties in the production of steel castings, but they also generate residual strains and stresses and volumetric expansion due to phase transformations and microstructure changes that occur during heat treatment of a steel body. These coupled thermo-mechanical-microestructural problem involves some complex metallurgical relationships that are described by different mathematical models. The purpose of the present work is to develop a computational tool, using Abaqus and FORTRAN subroutines, for analyzing the complete problem of heat treatment distortion and thermal stresses that includes prediction of the phase transformations, microstructure and material properties.

Customer Papers

The capabilities of Abaqus as a design tool are widely known, but it is also a very effective tool for failure analysis and forensic engineering. This paper examines two case studies in which Abaqus/Standard was used to assist in determining the cause of failure. In the first instance, a motorcycle wheel was found severely deformed and broken after an accident. At issue was whether the wheel failure was caused by impact with the road after a “wheelie” or a concrete block after loss of control. Abaqus/Standard was used to simulate these loading conditions, which required contact and highly nonlinear material behavior.

Customer Papers

Steel ropes are used in lifting applications, aerial ropeways, structures and buildings. To suit all these applications, ropes exist in a large variety of constructions. Their commonality is the build-up from individual wires. They are arranged in a spiral geometry and are in contact with each other.The paper shows an approach in modeling steel ropes with Abaqus with the goal to simulate properties like elongation, torque and turn. The FE predictions are compared with proven analytical methods and test results.

Customer Papers

Electrostatic Discharge (ESD) is a phenomenon where static electricity discharge happens between two electrically charged objects when they are in close proximity, such as the human finger approaching an electronic device. The high current pulse generated by the discharge process can flow into the electronic device, causing damage to internal PCBs and IC devices. With the trend in the electronics industry to increase operating speeds and decrease operating voltages of electronic components, devices are even more susceptible to ESD and designing-in protection to avoid damage, upset or failure is essential.

White Papers

An analysis of bridge roller bearings was performed using Abaqus as part of a failure investigation. Finite element analyses were conducted to gain an understanding of the stresses caused during operation and explain the possible cause of failure. Models of the bearings were required to represent the contact between the roller and plates, daily movement of the load and the non-linear behaviour of the material. An important output was prediction of residual stresses along the contact area of the rollers, induced by repeated rolling as the bridge expands due to daily and seasonal temperature cycles.

Customer Papers

A recent innovation project at Magneti Marelli Suspension Systems aims to test the feasibility and performance of an innovative and patented shape for the crossmember of a rear suspension system. The stresses under operating loads and the elasto-kinematic performance of the suspension greatly depend on the stiffness and shape of the crossmember. In this paper the simulation contribution to this project regarding the multi-step stamping process is presented. Abaqus Standard and Explicit have been used to manage the forming operations, re-positioning and spring-back. The software has succeeded in anticipating some critical issues in the tryout phase, thus reducing time and optimizing the component, by analyzing virtually a number of variants.

Customer Papers

Santos Basin is one of the most promising basins of Brazil, recently it was discovered light crude oil of 30o API (American Petroleum Institute), this reservoir of high productivity is located below a salt layer of two thousand meters of thickness. Salt also known as an evaporite rock is found in many hydrocarbon basins around the world. The objective of this work is to determine the effect of the fluency (creep) in salt during and after the drilling of the well, through numeric simulation. At first it is shown a validation of Abaqus finite element program comparing results from literature and then it is shown a simulation of a 3D vertical salt wellbore.

Customer Papers

High-performance computing (HPC), the massive powerhouse of IT, is now the fastest-growing sector in the industry, especially for the oil and gas industry, which has outpaced other US industries in integrating HPC into its critical business functions. HPC can offer greater capacity and flexibility to allow more advanced data analysis, which usually cannot be handled by individual workstations.

Customer Papers