SIMULIA 资源中心

This paper describes the use of the commercial code, Abaqus, to model the modal frequencies (vibrations) and the noise (acoustic wave propagation) in a catalytic converter used for diesel engine. A three dimensional model in CDF is used to first obtain the temperature distribution and the heat transfer coefficients, this information is then used to model the thermo mechanical performance of the converter in order to obtain the vibrations and the noise under real operation conditions.

Customer Papers

Fatigue is considered to be one of the main causes of the degradation of mechanical properties in mechanical parts. Probability and reliability methods are appropriate for fatigue life prediction using the uncertainties which exist in fatigue material or process parameters. In this context, evaluating the risk on the fatigue simulation outputs according to these parameters represents the most important challenge. To run reference simulation model, mean values of input parameters are used.

Customer Papers

The valve train system is one of the major component of internal combustion engine because of its influence on the performance, durability and NVH. In this study, a new valve profile design process using B-Spline curve is suggested. Since this new method maintains continuity of valve profiles, it is convenient to optimize the profile using Isight.

Customer Papers

When performing material testing usually global measurements are used for the calculation of material strains. Especially, when high strain rates of more than 100 1/s are examined those data are often unreliable. Within this paper the recently at EDAG introduced optical measuring system is presented and the identification of material parameters is explained. The comparison of experimental and numerical component test data of an automotive door trim demonstrates the advantages of such a system.

Customer Papers

Due to concerns over particle generation in conventional metal-on-polyethylene hip bearings used in total hip arthroplasty, interest in advanced low-wear bearing alternatives such as ceramic-on-ceramic couples has reemerged. While ceramics demonstrate excellent compressive strength, the brittle nature of the material reduces tensile strength, possibly leading to catastrophic fracture when loads exceed material limits. Impingement between the femoral neck and acetabular liner gives rise to areas of extreme transient stress concentration, which have been clinically linked to fracture. This work presents methodology for the investigation of 3D ceramic fracture initiation/propagation using Abaqus’ co-simulation and extended finite element modeling capability.

Customer Papers

Computational modeling of stents can provide insight into critical locations (high stress/strain regions), help with design iterations/optimization, and reduce the need for bench-top testing. This study focuses on the developmental efforts to create a material model that can capture the mechanical response of poly-L-lactide, the backbone of Abbott Vascular’s ABSORB Bioresorbable Vascular Scaffold.

Customer Papers

The state of the current automotive or heavy duty industries is changing rapidly, especially with the recent recession still in mind or to some extend still looming. In such an environment the competitiveness of a company is tested on every step. Engineering-based companies have to re-define their strategies, what means engineering to them.

Customer Papers

An irradiated graphite material UMAT subroutine models the through life behaviour of the core components, but the whole core structure is so large with many interactions that an ABAQUS model would normally put excessive demands on computational resources. However this difficulty has been overcome by making use of superelements and parallel programming.

Customer Papers

A person specific drop foot brace was simulated in the commercial finite element code Abaqus.The geometry was imported from a 3D optical scan of the actual surface and modeled as a composite material layup defined in a local discrete material coordinate system. The finite element model was used in order to model the stance phase in a normal walking. The material choice is a challenging task giving flexibility to the brace together with sufficiently stiffness and fatigue strength. The simulation has been compared with measurements from a strain gauge mounted foot brace tested in use. Based on simulations, a large number of expensive trial and error iterations can be avoided. Simulations show a strong geometry interaction with the loading of the material.

Customer Papers

A key factor in the design of bottles and packaging containers is performance during conveying. The ability of a bottle to remain standing while traveling through a conveying plant for production, cleaning, filling, packaging, etc. allows that plant to be automated. If bottles fall or jam during conveying then human intervention is required to correct the situation. Finite element analysis can be used to verify new bottle designs and ensure that changes to current designs will not cause a reduction in conveying performance.

Solution Briefs

The interaction of a subsea pipeline with the seabed is a complex phenomenon. Operational loads can cause a subsea pipeline to buckle or “walk” over the seabed, leading to very high pipeline stresses. In some cases however, the buckling phenomena can be beneficially used to relieve excessive stresses by allowing the pipeline to deform at pre-determined locations. The understanding and prediction of these phenomena is therefore crucial for subsea pipeline design.

Solution Briefs

In this Technology Brief, we demonstrate the Abaqus/ Standard implementation of one of the leading bone remodeling algorithms. User subroutine USDFLD is employed to capture solution dependent material properties, and the approach is used in the analysis of a total hip replacement design.

Solution Briefs