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Current industrial state of the art for predictive engineering of fiber reinforced thermoplastic materials utilizes nonlinear isotropic material modelling and/or anisotropic linear modelling. Both approaches give inaccurate predictions, since the effect of the orientation and length of the fibers is not taken into account in the former. Whereas, the latter omits the plastic behavior typically observed in thermoplastics. An innovative approach is developed in the last years which takes into consideration the anisotropic nonlinear behavior of the material. This approach which is based on micromechanical homogenization theories that considers both correct processing and fiber orientation, can significantly improve the accuracy of mechanical predictions, but is unfortunately very costly in terms of analysis time.

Customer Papers

Application of Abaqus to Analysis of 3D Cracks and Fatigue Crack Growth Prediction

Customer Papers

It is usual that the loads applied on structural elements are in fluctuating situations. Sometimes the component can break under its ultimate or its yield strength. This breakage situation is due to the fluctuating loads that have been applied over long periods. For this purpose this breakage type is called “fatigue breaking”. Fatigue breaking is a consequence of crack growth. When no prototypes are available, it is necessary to calculate the life prediction as soon as possible. Simulation through the VPG is increasingly being used for life prediction. The present work shows a methodology that uses a finite element model (FEM) that runs on a proving ground. In this case, no MBS (multibody software) model is used to obtain the loads on the structure.

Customer Papers

In this paper, a fully- coupled, temperature- displacement analysis using Abaqus/Standard was carried out to take into the account both thermal and structural effects on the brake rotor. The effect on thermal performance of rotational speed (corresponding to braking conditions) and rotor temperature, due to the rotating heat source, has been evaluated. Disc thickness variations are shown to arise from the temperature profile across the disc cheek surface. The scenario simulated considers the thermal effect of braking a vehicle which was prone to generating an audible rumble noise. The simulation measured the thermal and geometric changes in the disc, demonstrating the disc thickness variation and thermal banding of the rotor, and the location of these on the disc surface due to the effect of the thermo-mechanical loading.

Customer Papers

Non-Crimp Fabrics (NCF) are widely used textile reinforcements in fibre reinforced composite structures. The most important prediction from a draping analysis featuring preforms from these materials is their resulting fibre orientations; the orientations influence several other properties including fabric permeability and final component strength. The analysis is complicated by the influence of localized stitching patterns and their constraint on relative sliding of individual layers within a single ply during the draping process. The modeling procedure involves a process of material characterization valid for fabric preform materials and has been carried out using the Abaqus/Explicit finite element analysis code.

Customer Papers

SGI Solutions for SIMULIA Abaqus Customers

Customer Papers

Misuse analysis of the engine hood is a critical evaluation to verify robustness of vehicles. Major studies are carried out for the recent light commercial vehicle in Tofaş. Virtual simulation of the engine hood misuse test; development practices to improve performance and correlation activities with physical tests are stated on this study. Abaqus/Explicit solver is used for virtual simulations.

Customer Papers

Although the problem of friction-induced vibration has been the subject of many investigations over recent decades, it is still responsible for a large number of nuisances in the field of automotive. Using Abaqus For CATIA V5 (AFC) and Abaqus, this study presents a numerical process based on modal reduction to generate a Super-Element for the whole brake system. The size of the model is minimized using a specific non-linear modeling at the frictional interface. Then, the Super-Element is used in Matlab to check is ability to predict the stability analysis of large Finite Element Models that correspond to real automotive braking systems subjected to friction-induced vibrations.

Customer Papers

CLEMSON UNIVERSITY INDUSTRIAL EQUIPMENT

Tech Notes

In this paper we explain what SMS means to Dana, how we approach this topic, and what technologies we are investigating in order to achieve this new level of engineering. Since the process is very complex, we decided to start with a business value assessment (BVA). This engineering assessment was undertaken to understand the current status of our engineering organizations and existing technology, and then identify the gaps to where we want to be with our business. This helped to formulate a foundational strategy and long-term roadmap. With an existing strong focus on the CAE environment this also meant we needed, as previously mentioned, enhance the mindset and our global culture to make the next step in our systems evolution.

Customer Papers

To improve product design and enhance the realism of BD’s advanced finite element models, the development of a constitutive model capable of predicting mechanical behavior at high deformations was initiated for a commercially available latex rubber. A set of baseline experiments was conducted to determine the isothermal mechanical response(s) of the latex rubber. The experiments were designed to provide fundamental insight into any viscoelastic, hyperelastic, and Mullins effects exhibited by the material. A constitutive model was constructed for specific load cases from the aforementioned experimental data. Attention was given to the model’s primary use case, numerical stability, and its ability to perform at high deformation ranges..

Customer Papers

This work presents a finite element (FE) model of a flatfoot deformity to study its biomechanics and improve the surgical plan for individual patients. Despite being a common foot deformity, the biomechanics of flatfoot is not fully understood. Regarding the optimal surgery, foot surgeons have different opinions for individual patients. Studies using cadaver feet are difficult to manage due to individual differences in foot geometry; therefore, these studies have made limited contributions to improving surgical planning. One option for solving this problem is to use a computer-based model. Due to the essence of continuum mechanics, the FE method has been used to model the human foot for various applications. In this work, the software package Abaqus was used to model and simulate flatfoot.

Customer Papers

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This article was originally published in the June 2018 issue of SIMULIA Community...

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