SIMULIA Ressourcen-Center

This paper presents an interactive web-based simulation tool for a modern fatigue analysis and lifecycle prediction methodology of smooth and notched components. Users around the globe with diverse degree of fatigue familiarity may access it via Internet by means of multiple platforms such as desk- and lap-top computers, tablets and/or smart-phones. In particular, the users with a limited fatigue analysis background would benefit from “onthe-fly” fatigue learning experience. This is accomplished by means of proper guidance through a step-by-step process and providing specific details and explanations without the need of a tutorial handbook.

Customer Papers

Rocket engines need to withstand extreme gas temperatures. To achieve this, the engine is lined with copper and cooled with liquid hydrogen. Nevertheless, creep processes can lead to damage and failure of the component. To avoid this, rocket engines can be protected with thermal barrier coatings. Standard coating systems as used in gas turbines are problematic because of larger thermal stresses between the copper substrate and the coating due to a large thermal mismatch. In this work, we use finite element simulations to study the stress evolution in a coating material tailored for application in a rocket engine. The influence of the thermal conductivity on the resulting stress state is discussed and general conclusions for the design of thermal barrier coatings in rocket engines are drawn.

Customer Papers

During manufacture of parts made of thermoplastic composites in the process of thermoforming liquid of resin transfers to solid-state with occurrence of residual stresses in part which may lead to distortion of the shape of the product. Transition from liquid to solid is called the crystallization process, the reverse process – melting. In order to predict products distortion mathematical modeling techniques are developed. Methods are allowed to evaluate the degree of warpage of the selected design solutions and on the basis of these data to change the process parameters or product design.

Customer Papers

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

In recent years, CST’s filter design and analysis technology have continually improved,...

Article

Realistic Simulation is becoming an increasingly integral part of the product development...

Article

Corporate Knights just announced their list of the World’s Most Sustainable Corporations and we are...

Article

You may not have noticed it, but the cloud has been quietly...

Article

Mike Vasquez, Ph.D., CEO, 3Degrees, LLC The processing and materials technology for...

Article

This post originally appeared in the Navigate the Future blog. Fast delivery and...

Article

“Why don’t my simulation results agree with the measurement?” This is the...

Article

Already in the late 90’s, Simpack was being used by German universities...

Article

Product, Nature, and Life form the underlying foundations on which civil engineering...

Article

Designing energy-efficient, robust, and durable Turbine Blades is a multidisciplinary challenge in...

Article

The best part of working on the SIMULIA Academic Team is visiting...

Article

For hundreds of year, architects, designers and inventors have looked to nature...

Article