Centre de ressources SIMULIA

A discrete multi-mode damage initiation, propagation, and interaction tool is implemented within Abaqus’ implicit solver for residual strength and life prediction of bolted joints with a given initial damage resulting from the fabrication and installation process. A discrete crack network model (DCN) for damage progression prediction has been developed by combining mesh independent matrix cracking with cohesive zone delamination models at the ply interfaces. A regularized X-FEM (Rx-FEM) framework maintaining the distribution of the Gauss integration points without element slicing has been utilized for implementation of the solution module for residual strength prediction under monotonic loading.

Customer Papers

The goal of this work was to simulate both the flow in a rocket engine nozzle and the resulting flow-induced transient loads on the nozzle. This unsteady nozzle flow results in structural dynamic excitation, which contributes not only to nozzle stress and deformation but also to the dynamic loads that are transmitted to the rest of the engine. This paper demonstrates the capability of a coupled fluid-structure interaction (FSI) simulation for predicting side loads on a rocket engine nozzle. The capability was demonstrated using the space shuttle main engine (SSME) during a portion of the engine startup sequence.

Customer Papers

The paper describes using of Abaqus for evaluating the behavior of car plastic parts which are exposed to high temperature and self weight (plus another load) for long time. Car plastic parts (inside and outside) are subjected to complex loads – temperature, vibration and environmental conditions. It is a challenge to prepare simulations which correctly describe the complex behavior - temperature dependent, time dependent of stress-strain behavior. To capture visco-elastic behavior we chose a creep description of the material.

Customer Papers

Regarding FEM for welded structures, shell elements are mostly used to capture the structural behavior very efficiently. Depending on the choice of the element order, mesh size, etc. local nominal or even hot spot stresses can be calculated. These values can be assessed directly according to typical standards, i.e. Eurocode, DVS, FKM-Guideline etc. In our contribution we will present a method, which allows an efficient fatigue assessment of welded structures, based on deriving relevant stress quantities from the results of continuum models. This method has been implemented in the commercial software LIMIT for typical standards.

Customer Papers

Three-dimensional woven composites that are becoming increasingly popular in aerospace applications have superior through-the-thickness strength, stiffness, and thermal conductivity compared to conventional 2D laminated composites. However, despite their advantages, many details regarding the mechanical behavior of 3D woven composites are not as well-known as they are for traditional laminated composites. Microcracking of carbon-epoxy composites during resin curing is one important example. The main goal of this study is to improve the understanding of cure-induced microcracking through the development of realistic numerical models validated with experimental data.

Customer Papers

Abrasive wear of tillage tools by hard soil particles is a major concern in the agricultural industry. Previous efforts to understand the effect that various factors such as the soil composition and the tool material have on tool wear have been primarily experimental in nature. Since a large number of factors influence tool wear during tilling operations, it is impractical to expect the experimental studies to be exhaustive. The finite element method offers an additional tool that can be used in conjunction with experimental studies to further the understanding of wear in tillage tools. In this paper, preliminary results from a numerical study undertaken to study abrasive wear of tillage tools by soil particles are presented.

Customer Papers

This study is focused on analysis of post-repair behavior of composite structures. The objectives are to a) develop efficient computational approach for repaired areas, capturing processes of both damage initiation and growth; and b) demonstrate it in Abaqus on representative examples of composite repair designs. The approach is based on cohesive elements (CE), and the robust nature of generated numerical predictions is shown. Thus, the approach provides a very convenient FEA implementation and, on the other hand, can generate sufficient accuracy for repair-related design and service decisions. Results of parametric studies are presented for selected cases to demonstrate sensitivity of damage tolerance of repaired zones to input parameters.

Customer Papers

Unified analysis platform is the core value for SIMULIA Abaqus with realistic simulation. This paper demonstrated a successful integration of design process with various design requests where CEL dominated slamming wave impact transient analysis, CFD deal with ventilation and thermal analysis, and CMA was in charged with composite structure layup and manufacturing process management. This unified platform dramatically decreased yacht design cycle time and brought highly accurate simulations with complex physical problems.

Customer Papers

In this paper, we discuss applications and impacts of the new beam to beam contact capability from Abaqus V6.13 to industries – in particular to the medical device and automotive industries. The applications that we interested in the medical device industry are bending simulations on the implantable leads, specially, bending simulations on coils and multi-strand cables. The applications in the automotive industry include simulations on bending of electrical cables, wires, and wire bundles. Being able to accurately and fast model the stress or strain to the coil filar and cable strand level for the problems above are important for design engineers to predict the field performances and reliabilities of the products in both medical device and automotive industries.

Customer Papers

In the work is presented new numerical-analytical approach for the static analysis of composite materials filled by inclusions with various geometrical form and mechanical properties essentially distinguish from the properties of the matrix. It is considered two basic cases of spherical and prolate spheroid inclusions, which can contain additional interface layers. For this problem it was developed analytical method for a two-scale analysis of composite construction (micro- and macro-level) under SIMULIA Abaqus.

Customer Papers

Weight reduction of components and systems is of utmost importance in Aerospace industry. Reducing weight translates into higher performance and lower fuel consumption. In this paper we identify two components as candidates for weight reduction. In order to achieve this goal without sacrificing the current performance of these components we use ATOM optimization software within Abaqus environment. Current geometry models are simulated with the specified load cases to establish a baseline performance in term of stiffness and stresses. We then generate design envelopes representing the available space for topology optimization.

Customer Papers

Aluminum Wheel Impact Test (13 Degree Lateral, SAE J157) is the way in order to guarantee the aluminum wheel strength. CAE Team in Hyundai Motor Company has been carrying out the wheel impact test analyses using CAE (Abaqus/Standard), and developing the accuracy of analysis results by comparing with the tests. In this study, aluminum wheel impact test analysis will carry out with test jig model. And we’ll use dynamic implicit analysis (Abaqus/Standard) in order to simulate the rear impact test.

Customer Papers