SIMULIA 리소스 센터

The current framework for piping stress analysis is based on a simplified calculation method directly derived from experimental research performed over 60 years ago in the 1940s and 1950s. This framework was originally intended for hand calculations and, apart from minor changes and amendments, has been successfully employed by piping engineers since its development. As computational power increases and finite element analysis (FEA) becomes accessible for piping engineers, it has become clear that this framework is not well suited for complex FEA evaluation of piping. Advanced FEA procedures enable engineers to perform in depth evaluation of piping systems that are extremely difficult or even impossible to evaluate through traditional methods.

Customer Papers

A multiscale damage prediction procedure has been developed which employs Abaqus/Explicit to solve the problem at the structural level of composite structures. The multiscale framework has been established applying the user material subroutine VUMAT which is coupled with the micromechanical model. The procedure is based on a computationally enhanced version of the High Fidelity Generalized Method of Cells (HFGMC) micromechanical model. The twoscale approach enables calculation of the stress field within the unit cell, based on the constitutive behavior of each subcell and the unit cell morphology. As the stress distribution is determined for the representative unit cells, calculations of failure criteria and damage effects in the composite are performed at the micro-level.

Customer Papers

The work is concerned with the development of such a predictive model using a rebar-approach in Abaqus. In this approach, the fibres are held in a “shell” by some other means – perhaps stitched loosely or held by uncured prepreg resin. Any forming deformation rearranges the fibres and needs to do this against the frictional or other restraint offered internally by the “shell”. The anisotropic properties of the preform are naturally represented by the model. The model is used to solve some verification problems from the literature, as well as performing draping/forming analysis in a particular mould using a calibrated preform kinematic/mechanical model.

Customer Papers

Trek Bicycle Corporation has long been at the leading edge in the bicycle industry. Treks bicycles are subjected to the most rigorous testing in the industry and their frames are covered by a lifetime warranty. To maintain the highest level of safety and quality, real world loads need to be properly understood. Trek Factory Racing professional athletes are pushing that understanding; most recently attempting a front flip across a 72 foot canyon. The loads generated for such an event are certainly beyond current understanding and testing protocols.

Customer Papers

The Aerospace Systems Design Laboratory (ASDL) at the Georgia Institute of Technology has an advanced virtual prototyping facility for small-scale UAVs and autonomous systems to conduct conceptual and preliminary design trade studies. The authors are using requirements inspired by a US Army UAV research project to develop a design process that will employ the Winning Program Experience (packaged DS software on the V6 platform). In order to analyze large UAV concept spaces, ASDL has developed a process called the Interactive Reconfigurable Matrix of Alternatives (IRMA). The study will discuss how virtual test benches will be created for UAV systems, including simulation objects for SLM/Isight.

Customer Papers

The term ‘Unconventional Reservoirs’ is used in the oil and gas industry for hydrocarbon reservoirs that have very low permeability in the magnitude of microdarcy (μd) and therefore rely on artificially introducing pathways for fluids and gases, commonly by using hydraulic fracturing techniques, to enable economic production. This approach of using fracturing stimulation campaigns is also increasingly used to improve production in mature oil and gas fields. Industry estimates for North America indicate that more than half of all stimulation treatments have no impact on production, despite this technique having been in use in numerous onshore wells for more than a decade.

Customer Papers

This work presents a methodology for the analysis of deviations that might be produced during the assembly process of aircraft components using the finite element method as calculation tool. The methodology allows determining the effect that different deviations in the constituent parts may have on the final tolerances of an assembly considering the influence of the joining techniques and the different operations that are usually carried out during such processes. This permits to evaluate if certain deviations in some parts would maintain the final assembly within the specified tolerances or, conversely, may accumulate/propagate negatively generating a non conformity.

Customer Papers

A noticeable number of weight and cost reduction projects are performed with the help of highly improved computer aided engineering (CAE) tools within the vehicle engineering development activities. In this paper, a complete optimization study is applied to a leaf spring with 5 leaves used in the rear axle suspension systems of 6x4 heavy duty trucks by reducing the number of leaves down to 4 together with weight and cost reductions.

Customer Papers

This work presents the development of Finite Element (FE) models to simulate different stages of the design and operation of constrained inflatable structures. Such structures can be used, for example, for sealing segments of underground civil infrastructure such as large pipes or tunnels. In such applications, the confined inflatable structure is prepared for placement, either permanently or temporally, and left ready for deployment, inflation, and pressurization when needed. Once positioned and in operation, the inflatable may be subject to a number of possible loading scenarios and interaction with the surrounding confining environment, which must be evaluated beforehand.

Customer Papers

This paper presents an FEA approach by using a damaged plasticity model to capture the complex thermal and mechanical behavior of cement material. The damaged plasticity model considers the thermal conductivity, tri-axial stress effect, strain-hardening due to plasticity, strain-softening due to cracking and cyclic loading responses. This paper also presents a post-cracking design concept as a new design basis to allow limited cement cracking, providing that the permeability of the cement remains within an acceptable limit. An illustrative example is presented to demonstrate the use of FEA approach and post-cracking design concept for the design of thermal well cements.

Customer Papers

Composite products are gaining wide popularity in industrial production. But after getting impact damage composite parts do not behave as metals due to absence of plasticity. It is very important to analyze BVID damage and residual strength of the composite structure after impact damage. The analysis was carried out on the damage after low velocity impact with use of Virtual Crack Closure Technique and Hashin criteria with corresponding degradation model. For detailed representation of stress fields submodeling technique was used as well.

Customer Papers

In the Fracture Mechanics field, standard industrial methods for crack growth analysis are mainly based on analytic calculations as classical Finite Element approaches are not practical to deal with discontinuities such as fatigue cracks due to the associated high computational costs. eXtended Finite Element Method (XFEM) is one of the methodologies that are being developed in the recent years in order to overcome the limitations associated to classical approaches, especially for complex analysis. However limited industrial experience is available to adopt this methodology as a standard practice in the aircraft industry.

Customer Papers

Production of Electric Vehicles is expected to grow from 3 million to 125...

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안녕하세요 다쏘시스템코리아 SIMULIA 브랜드팀입니다. 이번 포스팅은 Abaqus/Standard와 Abaqus/Explicit의 co-simulation을 이용한 Beam의 충격해석에 대해 소개해 드리겠습니다. Co-simulation 기법은 Abaqus와

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