SIMULIA 리소스 센터

Understanding the lumbosacral spine and the functional spinal unit (FSU) is essential in assessing the mechanics associated with normal spine function, spinal loading, degenerative disc disease (DDD), simulations of surgery as well as the impact of fusion, and total disc replacement (TDR). The lumbosacral spine and FSU comprise of bones and complex soft tissues such as intervertebral discs (IVD) and ligaments. Probabilistic studies based on these deterministic FE formulations are of great interest currently as model input parameters (such as properties of nucleus, annulus and facet, ligament stiffness and reference strain) have been characterized experimentally and contain substantial levels of variability.

Customer Papers

In this paper, an ABAQUS two dimensional transient modal dynamic finite element analysis was performed of a simplified brain model surrounded by cerebral spinal fluid and encased in PMMA. Viscoelastic material parameters of the brain tissue simulant were obtained from open literature. Low speed loading conditions were applied at different locations of this simple brain model structure. The von Mises stress and pressure contours at different times and displacement history plots are presented. The transient dynamic analyses provide insight into key areas of interest and information on the optimal placement of sensors in a more complex brain surrogate model.

Customer Papers

Numerical simulations have found growing interests in evaluating interconnect reliability in electronic packaging, particularly for lead-free solder joints. To achieve good predictive capability, appropriate constitutive properties for the solder balls and a damage mechanism based life prediction model must be provided. In this paper, a simple published but efficient approach is adopted to predict life of SnAgCu joints subjected to temperature cycling. The complete finite element model and its analysis are done in ABAQUS using its scripting interface. Finally a numerical example is presented to illustrate the procedures, and, hence, demonstrates the capability of ABAQUS in electronic packaging modeling.

Customer Papers

In Japan, social demand for heavy industries seems to have been saturated, resulting in the center of the balance of the engineering population deviating toward the field of products with faster delivery times and lower prices. In such a field, while the constraints due to the trend in demand and cost always take precedence over all others, safety and environmental issues are inherently receiving public attention. Accordingly, the analysis of the ultimate state of products, as represented by the crash of automobiles or the dropping of mobile devices, is strongly desired within actual design cycles.

Customer Papers

SIMULIA Multibody Simulation User Group Meeting 2017 Program

Brochures

Thread connections are widely used in oil and gas industry. Determination of burst and collapse response of threads under critical pressure is important in a design process; however, a straight forward analysis of helical thread connections would require a huge model and long computing time. This paper will discuss other techniques that can determine the required information more efficiently. Using this model, only an axissymmetric model is needed for critical burst-pressure determination.

Customer Papers

Mitral valve regurgitation (MR) occurs when a flaw in the mitral valve causes backflow of blood into the left atrium. It is possible to reduce the amount of MR by reshaping the mitral annulus which, in turn, changes the configuration of the valve leaflets. A new percutaneouslydelivered device which induces this reshaping is currently under development at Edwards Lifesciences. The device, which is placed in the coronary sinus (CS), is essentially a spring with anchoring stents at each end. This study examines the mechanical behavior of one of the anchoring stents, from its forming from a small diameter tube to its deployment into the coronary sinus. The anchoring stent is modeled using the ABAQUS Superelastic constitutive model, and the CS is modeled using a hyperelastic constitutive model.

Customer Papers

A computational thermo-mechanical model has been developed to simulate the continuous casting of shaped sections, such as used for steel thin slabs. A general form of the transient heat equation including latent-heat from phase transformations such as solidification and other temperature-dependent properties is solved numerically for the temperature field history. The resulting thermal stresses are solved by integrating the highly nonlinear thermo-elastic-viscoplastic contitutive equations using a two-level method. The model is applied to simulate a 3D transverse section of the thin slab caster with a funnel, known for a complex geometry, with actual temperature dependant properties and realistic operating conditions as it moves down the mold.

Customer Papers

The development of benchmark examples for quasi-static delamination propagation and cyclic delamination onset and growth prediction is presented and demonstrated for Abaqus/Standard. The example is based on a finite element model of a Double-Cantilever Beam specimen. The example is independent of the analysis software used and allows the assessment of the automated delamination propagation, onset and growth prediction capabilities in commercial finite element codes based on the virtual crack closure technique (VCCT).

Customer Papers

A common requirement in the oil and gas industry is to design structures that are adequate against the effects of accidental gas explosions. This paper presents an overview on the methodologies involved in the study of the response of structures to resist blast and explosion, focusing on the use of nonlinear finite element analysis (NLFEA). NLFEA can be used to overcome the limitations of commonly used analytical methods which are predominantly developed for elastic response or limited plastic response and do not allow for large deflection and unstable responses.

Customer Papers

Los Alamos National Laboratory (LANL) has released a new version of MCNP, its general purpose Monte Carlo N-particle transport code, which has the ability to use unstructured meshes created with Abaqus/CAE as geometry descriptions. This improvement allows mechanical engineering models to be used in place of legacy constructive solid geometry descriptions, which are far less sophisticated. This capability also allows for the seamless integration of radiation transport calculations with analysis of the resulting thermal and mechanical effects on materials. Using Abaqus/CAE for visualization of the results calculated by MCNP6 is a major advantage over the previous ability to view results in two-dimensional space with MCNP’s native plotter.

Customer Papers

The new commodity high performance computing (HPC) hardware together with the recent ABAQUS performance enhancements, have made it possible to build high performing ABAQUS computing environment cost effectively. Since ABAQUS supports the distributed memory parallel (DMP) hardware, the usage of the cluster type of hardware has become very interesting. This paper presents the current state of ABAQUS computing environment set-up at the company.

Customer Papers