SIMULIA 리소스 센터

Bolted joints are frequently used connections in many engineering systems, and crucial parts of the heat transfer path in structures. During the design phase, heat transfer across the joints must be modelled properly in order to determine the accurate temperature distribution on components. Usually in finite element models, perfect thermal contact between mating surfaces is assumed. However; this approach is inadequate and may bring on misleading results owing to the equality of temperature assumption between surfaces. In this study, transient conduction heat transfer through the bolted joints was modelled in Abaqus/CAE by defining gap conductance between the abutting surfaces.

Customer Papers

The cold rolling process is one of the most important in the metal industry. The strips produced by this process are used in different applications. The quality and shape control of these products are very important factors during the production process. It is well known that the strip shape is influenced by: the rolling speed, strip width, forces, rolls deflection, etc. This work considers modelling a 4 high cold rolling process and obtains the strip profile, with a static model using an arc contact with springs representing the whole model. This idealized model was developed to reduce the computational time of the dynamic model being used.

Customer Papers

Uni-directional glass fiber reinforced polymers play a central role in the task increasing the length of wind turbines blades and thereby lowering the cost of energy from wind turbine installations. During this, optimizing the mechanical performance regarding material stiffness, compression strength and fatigue performance is essential. Nevertheless, testing composites includes some challenges regarding stiffness determination using conventional strain gauges and achieving correct material failure unaffected by the gripping region during fatigue testing. Challenges, which in the present study, has been addressed using the finite element method. During this, a verification of experimental observations, a deeper understanding on the test coupon loading and thereby improved test methods has been achieved.

Customer Papers

: The buckling of axially compressed cylindrical shells is known to be sensitive to imperfections, as is the buckling of spherical shells under external pressure. Regarding these problems, a very slight imperfection can be the starting point from which local deformation is initiated and developed and, consequently, overall structural stability is lost. Therefore, it has been very difficult to pursue an analysis using the conventional approach, which is typically represented by the arc-length method. The methodology developed in our previous study demonstrates the applicability of the artificial damping method of Abaqus from which we can overcome the difficulty in performing the analysis due to local instability. This paper describes the application of the technique for the generation of singularities in large-deformed viscoelastic and elastoplastic cylindrical shells, which is expected to be utilized in the packaging of food, daily articles, and pharmaceuticals.

Customer Papers

A new design of containment vessel has been proposed to conduct confined detonation experiments. In order to guarantee the confinement of the detonation products, the risk expressed as a probability of failure has to be quantified. This quantification is done using probabilistic analyses which require data from experiments and simulations in order to be sustained. When a blast stresses a spherical vessel, many different mechanical phenomena appear and have to be studied using adapted models. A blast leads to reflected waves in the structure. A numerical chaining is used to access the vessel dynamic structural response. This chaining consists in linking CATIA V5 with Abaqus/CAE to realize the analysis models and in linking our hydrodynamic code to Abaqus /Explicit in a weak coupling.

Customer Papers

Many deep water reservoir rocks are soft and consist of unconsolidated or weakly cemented sands. Fractures may have to be created in these soft reservoirs for a variety of purposes, such as the injection of fluids to maintain reservoir pressure, constructing Frac-Pack sand control mechanisms, etc. It is now recognized that fracturing in unconsolidated sands involves complex failure mechanisms and is very different from fracturing in hard rocks. The simulation of these complex failure mechanisms can only be achieved with suitable models that account for the coupling of inelastic soft rock deformation and fluid pressure changes. In this paper, we discuss the implementation in Abaqus of a poro-elastoplastic constitutive model for soft rock and its application to some practical problems.

Customer Papers

It is well known that high strength steels are tremendously affected by hydrogen. The aim here is to provide a modelling of the HELP (Hydrogen Enhanced Local Plasticity) mechanism fully coupled with the hydrogen transport equation. The hydrogen diffusion equation is implemented in a UMATHT subroutine by considering similarities between the heat and mass diffusion equations. A coupled temperature-displacement procedure has been adopted to allow the coupling between hydrogen diffusion and the mechanical behaviour of the material.

Customer Papers

Polymeric materials are complex in their mechanical behaviour; inter alia, they exhibit large strain, anisotropic and irreversible response which is often accompanied by stable localized necking behaviour. When developing suitable computational models for such materials, one cannot do this without the underlying support of a FEM program that offers inherently non-linear solution capabilities.

Customer Papers

In this study, the optimization software, Isight is coupled with current state-of-the-art computational fluid dynamics (CFD) simulations of in-cylinder mixture preparation to automate the spray pattern optimization for an engine combustion system. The spray pattern is automatically adjusted to minimize the fuel vapor stratification and liquid wall wetting in the cylinder at three different operating conditions. Mixing homogeneity has been achieved by using the optimized spray pattern. No significant increase of wall wetting is observed.

Customer Papers

Application of the CAE is needed to obtain optimized performance of the air spring under the consideration of many design factors. This Paper presents a method for estimating the durability of the air spring by applying it to the suspensions of a vehicle. We developed FE analysis techniques based on Abaqus, which enables us to evaluate and enhance the durability of the air spring at the initial design stage. Also, we validated the results by applying it to a mass production vehicle.

Customer Papers

In this paper, we discussed the application of impact analysis of aluminum wheel. The analysis model consisted of aluminum wheel and tire structure. The tire structure model was naturally inflated with pressure by Abaqus/Standard, and the results of implicit analysis were imported to Abaqus/Explicit for the dynamical impact analysis afterward. Both results of 13 and 90 degree impact analyses were compared with the experimental data; the performance and accuracy were examined.

Customer Papers

Automatic Storage and Retrieval Systems (ASRS) are computer-controlled systems for handling products in storage facilities with minimal manual labor. The combination of densely stored goods, height of structures, large number of interconnected racks, and tight geometrical tolerances raises concerns of structural damage to the system when exposed to elevated temperatures. Structural damage of this type could potentially lead to long down-times while the affected unit is being repaired or loss of building integrity when the rack is part of a building’s structural support. The behavior of typical single- and multiple-row ASRS racks was investigated.

Customer Papers

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안녕하세요. 다쏘시스템코리아 SIMULIA 브랜드팀입니다.이번 포스팅에서는 CST (Computer Simulation Technology)의 CST PCB STUDIO (CST PCBS)에 대해 알아보도록 하겠습니다.CST PCB STUDIOCST PCB STUDIO는

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