SIMULIA 리소스 센터

This presentation is focused on in-car vibrations and shows how KONE uses ABAQUS in the chain of multi-physic computation. The ride comfort depends on the elevator design, running parameters, installation quality and the building behavior. From finite element point of view the important issues that induce guide rails variable movement are: misalignment of the guide rails which typically are in the range of millimeters with a 10 cm distance between the peaks and lengths over 500 meters, suspension, compensating and travelling ropes introducing variable mass acting on the sling as a function of car position, air-flow induced forces caused by the counterweight passage at high speed and sway shape and magnitude of the building.

Customer Papers

To obtain sufficient accuracy for vehicle dynamic performance simulation, it is necessary to consider bushing amplitude and frequency dependency as well as preload effects in the rubber bushing model. FE models are capable of reproducing these characteristics though it is difficult to obtain sufficient calculation accuracy within practical computation time. This paper proposes a new low DOF bushing model by utilizing the user subroutine functionality of Abaqus. The new bushing model exhibits high computational performance while maintaining precision.

Customer Papers

As automation becomes more widespread across many industries, predicting and fine-tuning complex machine behavior is increasingly critical for optimizing performance. International engineering software provider Digital Product Simulation (DPS) was looking to develop a methodology for simulating the interaction of electronic controls with factory hardware.

Tech Notes

Metal Big Area Additive Manufacturing (mBAAM) is a new additive manufacturing (AM) technology based on the metal arc welding. A continuously fed metal wire is melted by an electric arc that forms between the wire and the substrate, and deposited in the form of a bead of molten metal along the predetermined path. Objects are manufactured one layer at a time starting from the base plate. The final properties of the manufactured object are dependent on its geometry and the metal deposition path, in addition to depending on the basic welding process parameters.

Customer Papers

The balance shaft clamping bolts in the recent engines tend to have the loosening problem by increased engine power. In this paper, a CAE procedure is introduced to predict loosening angle of bolts, wear, durability of the drive shaft. The procedure is performed through two analysis steps. In the first step, the multi-body dynamic simulation is used to obtain more accurate loading boundary conditions applied to the finite element model for the following step. Next, the finite element analysis is performed to predict the durability of the drive shaft through the calculation of the safety factor. Through this CAE procedure, design guidelines leading up to good BSM reliability has been obtained as a result of this activity.

Customer Papers

Selective laser melting (SLM) leads to high cooling rates and correspondingly high residual stresses, which can distort the printed part on the printing platform and even lead to part cracking and consequent print failure. The temperature profile and cooling rates during the SLM process are influenced by the surrounding powder bed and building platform, which can act as a significant heat sink depending on part design and platform arrangement. The new functionality of the Abaqus additive manufacturing simulation framework allows for separate modelling of solid (laser exposed) material, powder bed (not exposed) and platform (not exposed), as well as evolving heat transfer surfaces for the AM part. In this paper we highlight the influence of the surrounding powder bed and platform on the thermal characteristics of the printed part.

Customer Papers

In this study a 3D finite element model of the skull is created using CT scan data. All complexities of the skull geometry are simulated using ABAQUS. This numerical model is then subjected to frontal, lateral. vertical, occlusal and angulated impact conditions. Impact analysis is done and weak areas susceptible to fracture and hence failure are identified. Further fracture fixations of various designs and materials used in craniofacial fracture fixations are placed in different fracture situations in the virtual model and subjected to different impact conditions. This will enable the study of fracture and stability of the fracture of the skull under cranio facial fracture conditions.

Customer Papers

The working group of JANCAE was launched from the idea of providing a multidisciplinary forum for steel researchers, design engineers, and software engineers through the medium of advanced finite element codes. The subroutine library is called the Unified Material Model Driver for Plasticity (UMMDp). This paper introduces the development of UMMDp and discusses a simulation of a drawing and redrawing process using some yield functions for its applications with Abaqus.

Customer Papers

To assess the durability of a structure under random loading, the frequency based random response analysis is performed to obtain the stresses. Since random response analysis ignore the element damping, the results of the random response analysis can be unrealistically twisted if significant local element damping exists. This paper present an Abaqus FEA procedure to more realistically calculate the stress of the structure subject to random loading by submodeling and including element damping, which is a complementary method to Abaqus random response analysis procedure.

Customer Papers

In this paper, thermo-mechanical-metallurgical simulations of Ti-6Al-4V parts produced by SLM are validated against experimental measurements. The work involves the simulation of the SLM process and the prediction of location-specific microstructural features (such as grain size, morphology characteristics and phase fractions). A framework for more generally predicting the mechanical properties of printed parts is then presented. This involves the implementation of a novel mapping between microstructural quantities and tensile properties at each material point. The results demonstrate the potential that the powerful new features of Abaqus2017 have for simulating AM processes.

Customer Papers

Although additive manufacturing was first developed in the 1980’s, the technology is mainly applied for prototyping and tooling. The printing process is not well understood and controlled to be confidently used for printing of load bearing parts. Due to the complex geometry and the layer by layer printing process, parts as printed may show distortion, residual stress, delamination and failure that render the part unusable at the moment that it comes out of the machine. Finite element simulations of additive manufacturing can be very effective in understanding the cause of these defects and predicting the in-service performance of the printed parts. However, most finite element codes are not designed for simulating additive manufacturing processes.

Customer Papers

The buckling of a real, thin-walled shell is typically a local phenomenon, and it may be triggered by a small, local disturbance. 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. In this study, we provide an explanation for the artificial damping method from which we can overcome the difficulty in performing the analysis due to local instability.

Customer Papers

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