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In this Technology Brief, an Abaqus/CAE plug-in for the analysis of filament wound composite pressure vessels is presented. The application allows the user to create, run, and post process a finite element model and allows for detailed specification of structural geometry and winding layout parameters.

Solution Briefs

The Dynamic Design Analysis Method (DDAM) is a U.S. Navy methodology for qualifying shipboard equipment and supporting structures for survival of shock loading due to underwater explosions (UNDEX). The DDAM is a regimented collection of procedures that utilize estimates of the peak linear dynamic response of ship equipment and structures obtained from normal mode response spectrum analyses. The response spectra are usually based upon empirically obtained Shock Design Values (SDVs) that are dependent on the type of ship, mounting location, direction of attack, response frequencies, and overall survivability requirements.

Solution Briefs

In this Technology Brief the coupled Eulerian-Lagrangian analysis method is used to model the installation, extraction, and in-situ loading behavior of spudcans.

Solution Briefs

An understanding of functional responses in oral bone is a crucial component of dental biomechanics. The purpose of this study was to investigate the use of an osseointegrated implant as support for a free-end removable partial denture on the potential biological remodelling response during mastication.

Customer Papers

In this technology brief two related but distinct analyses are examined. First, the shock response of an example structure due to a shock event is considered. Second, the steady-state acoustic field established due to machineryinduced vibrations within and around the structure is estimated.

Solution Briefs

In this Technology Brief, we describe a methodology for modeling the crushing behavior of composite structures using Abaqus/Explicit. Very good quantitative and qualitative agreement between the numerical results and experimental data is shown, demonstrating the utility of Abaqus/ Explicit for assessing the crashworthiness of composite structures and reducing the amount of costly experimental testing.

Solution Briefs

In this Technology Brief we present some results from simulations performed on a model of a human head [4]. The distributions of electrical potentials and currents within the model are calculated for known source locations in the brain. The electrical conductivity in the model is considered to be inhomogeneous as well as anisotropic.

Solution Briefs

In this Technology Brief, the use of Abaqus in the investigation of the collapse of the I-35W bridge is outlined.

Solution Briefs

A methodology to study the sound radiation of engine valve covers is presented. The analysis process uses a nonlinear static simulation followed by a steady state dynamics simulation to determine the sound pressure field due to the vibration of the engine cover. The effects of assembly loads are included. The methodology is demonstrated with two representative engine valve covers using acoustic finite and/or infinite element methods. Good correlation between the analysis results and available experimental data is achieved.

Solution Briefs

A methodology to study friction-induced squeal in a complete automotive disc brake assembly is presented. The analysis process uses a nonlinear static simulation sequence followed by a complex eigenvalue extraction to determine the dynamic instabilities that are manifested as unwanted noise. The effects of assembly loads; nonuniform contact pressure between the brake linings and disc; velocity-, temperature-, and pressure-dependent friction coefficients; friction-induced damping; and lining wear can be included. The methodology is demonstrated with a representative disc brake assembly. Good correlation between the analysis results and available experimental data is achieved.

Solution Briefs

Total knee replacement gives proven good results for isolated patello-femoral osteoarthritis, but patello-femoral arthroplasty may be more appropriate because only the joint compartment is replaced. Although the femoral component of a patello-femoral prosthesis is smaller than in total knee arthroplasty, it is unknown whether strain-adaptive periprosthetic bone remodeling occurs following patello-femoral arthroplasty. The aim of the study was to evaluate and compare the stress shielding effect of prosthetic replacement with Finite Element modeling.

Customer Papers

The Vernay VernaFlo flow controls are custom-designed fluid flow management devices used in a wide range of applications and systems where consistent, reliable operation is essential. Elastomeric rubber components in these devices deform under the influence of upstream variations in fluid pressure. These deformations adjust the orifice diameter and help maintain a constant downstream flow rate. In this Technology Brief the performance of a custom VernaFlo device is evaluated using the fully coupled fluid-structure interaction solution provided by the Abaqus co-simulation capability. The effects of cavitation on the flow are considered. The computational results compare favorably to available experimental data.

Solution Briefs