SIMULIA 리소스 센터

Finite Element Simulation of Friction Stir Welding (FSW) is a problem involving large deformations and is often difficult to solve using the classical Finite Element Method (FEM). Large mesh distortions and contact problems can occur due to the large deformations such that a convergent solution cannot be achieved. Since in ABAQUS, a Coupled Eulerian Lagrangian (CEL) approach has been developed to overcome the difficulties with regard to FEM and large deformation analyses. In this article, this method is investigated regarding its capabilities in simulating FSW process.

Customer Papers

Various elastoplastic constitutive models have been proposed to predict the structural stiffness; most of them use an associated flow rule, which defines a plastic flow direction normal to the yield surface. These models, based on this assumption, have contributed to the predictions of elastoplastic deformations of solid structures in several applications, however, in some cases, they tend to overestimate the structural stiffness. In order to overcome this defect, we have adopted an unconventional elastoplastic model capable of taking into account the generation of the inelastic strain rate not only along the direction normal to the yield surface but also along the tangential one. In this paper the aforementioned model has been studied by applying a series of non-proportional loading paths to a thin wall pier and comparing the results obtained with the ones derived by neglecting the tangential contribution.

Customer Papers

A spreading environmental awareness has prompted a global movement towards leadfree electronic products, in which lead-free tin plating is included. Lead-free tin plating provides good solderability equal to tin-lead plating, however the spontaneous whisker growth on lead-free tin plating is a serious reliability issue. It's imperative to clarify the whisker generation and growth mechanism. So we have developed a multi-scale simulation technique for calculating tin atom diffusion caused by stress gradient induced by temperature change and crystal orientation distribution in polycrystalline tin plating. This multi-scale simulation technique uses molecular dynamics (MD) simulation and a finite element analysis (FEA).

Customer Papers

The presentation is about the application and impact of Abaqus and iSight simulations for corrugated board and packaging within Smurfit Kappa. Abaqus and Isightare used for the development of the prediction formulas, used in our prediction tool PaperToBox. PaperToBox is considered as industry leading. This tool is internally used by 1800 colleagues, resulting in >500 000 calculations per year. Also this tool provides the target values for the newly rolled-out quality measurement system, the “Board Referee”.

Customer Papers

Today, numerous aeroelastic structures are deployed over a finite time period, such as flaps, spoilers, control surfaces, and wheel bay and bomb bay doors. These devices must be both divergence and flutter free. Current state-of-art simulations verify this by applying a quasi-steady assumption that does not require the system to physically deploy within the computations. That is, the structure is assumed elastic but does not possess the “large” motion associated with the device’s path of travel. While these simulations have strong technical merit, especially in the case where a structure is inadvertently locked in a partially deployed position, they are unable to capture all of the relevant physics.

Customer Papers

Composite materials based on thermoplastic matrix became a popular choice as a material for modern structures. Nevertheless, the manufacturing process of this type of materials have many technology parameters, which have to be determined before the first composite part is produced. The study of influence of all parameters on final quality of composite part by means of technological experiments are time and cost consuming. This makes engineers to study the way of the modeling of thermoplastic composite forming process. This research is dedicated to the modeling of thermoplastic material under different conditions.

Customer Papers

Fokker Landing Gear has a history in development of composite technology for landing gear applications. In order to successfully design and qualify composite landing gear parts it is essential to be able to reliably predict the mechanical and failure behavior of the composite material. Therefore the goal of this study was to develop, calibrate and validate a material model which can be used to reliably predict the failure behavior of fiber-reinforced composites. In the developed material model the fibers and resin are modelled as separate materials with their own specific material and failure behavior. The interaction between the fibers and resin is accounted for using a (proprietary) modified Mori-Tanaka approach.

Customer Papers

The latest generation of rotary steerable drilling systems make it possible to reach hydrocarbons located deeper and in more hostile environments than ever before. These systems give the directional driller, standing some 10,000ft above on the rig floor, the ability to steer the well path in real-time to reach the elusive ‘pay zone’. Rotary steerable drilling systems, which are located at the end of the drilling assemblies, are exposed to extreme conditions. In addition to temperatures in excess of 390°F and pressures up to 25,000 psi, they must also convey compressive and bending loads, torque and rotation to the drill bit from the surface, all while controlling the 3D trajectory of the wellbore.

Customer Papers

In the oil and gas industry, steam assisted gravity drainage (SAGD) is an operation where steam is injected into a reservoir to lower the viscosity of heavy oil to allow its production. The injection of steam leads to thermally induced stresses and pore pressure changes in the reservoir and its proximity. Although the pressure and temperature evolution can be modelled with reservoir simulators, they neglect the change of the stress field in relation to these properties, which can impact the stability of faults and fractures. These active faults and fractures, in turn, affect the fluid transport properties. In order to assess the potential for fault and fracture (re-)activation we created a model of a SAGD operation by coupling the outcome of a reservoir simulation to a 4D geomechanical finite-element model using Abaqus.

Customer Papers

This paper describes a new computational approach aimed at investigating the crack propagation inside smart structures equipped with surface bonded piezoelectric layers, when the electromechanical coupling due to piezoelectric phenomenon is exploited. The Abaqus code is used to perform a prediction of both the fracture mechanics and the coupled response of the structure, through a suitable connection between the two solution environments, being provided by the Isight tool. A preliminary analysis is shown and some significant results are proposed.

Customer Papers

This study presents a three-dimensional (3D) micromechanics-based nonlinear framework for the analysis of discontinuous long-fiber (DLF) thermoplastic composite materials and structures. The proposed material modeling framework is a nested micromechanical approach that explicitly recognizes the composite system within the cross-section of a DLF composite member. The overall modeling approach is able to predict both the elastic and nonlinear response of the composite material based on the in-situ properties and response of the fiber and matrix constituents. Coupon tests are used to calibrate the in-situ linear and nonlinear properties of the fiber and matrix.

Customer Papers

The University of Southern California Rocket Propulsion Laboratory (USCRPL) is developing a single stage sounding rocket that is intended to deliver a small electronics payload past the Kármán line at 100 km altitude. A full scale static firing of the solid fuel booster was required in order to obtain the necessary launch permits from the Federal Aviation Administration and Bureau of Land Management. Though successfully demonstrated in sub-scale static and flight testing, this entirely carbon composite combustion chamber experienced catastrophic failure during consecutive static firings. As part of the anomaly investigation into this ground test failure, the Composite Modeler for Abaqus/CAE was used to identify the root cause.

Customer Papers

This is the first part of a two-part article about manufacturing HVAC...

Article

Designing a Compact Ridged Waveguide Filter Multi-mode cavity filters offer high power...

Article

We’re getting to know Exa’s PowerFLOW suite and welcoming content about simulation...

Article

This article was originally published in the June 2018 issue of SIMULIA Community...

Article

We were once again blinded by Science in the Age of Experience...

Article

This article was originally published in the June 2018 issue of SIMULIA Community...

Article

This article was originally published in the June 2018 issue of SIMULIA Community...

Article

This post originally appeared in the Navigate the Future blog. From the birth...

Article

There’s no question that vehicle electrification and autonomy are two of...

Article

Demand for fuel-efficient trucks has never been higher in our current climate...

Article

This is the final part in a three-part series about our themes...

Article

This is the second part in a three-part series about our themes...

Article