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Nonlinear Finite Element Analysis is performed to investigate the crack of a prestressed double tee canopy beam due to thermal expansion. Concrete damage plasticity material model is employed to detect the potential crack of concrete beam caused by thermal loads. The bond between pre-stressed strands and concrete is modeled by tie, cohesive element and friction. Explicit modeling approach is selected due to the significant discontinuity in the threedimensional model. The potential crack pattern from FEA modeling indicates the actual crack as observed in field quite well.

Customer Papers

Failure of pharmaceutical packaging incurs the risk of negative health outcomes and expensive product recalls. Pre-filled syringes represent a growing portion of the drug packaging market. During its working life, a syringe experiences stresses that may result in material damage. Specifically, the syringe barrel may develop microcracks that coalesce and propagate, causing the syringe to fracture and its contents to lose sterility.

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The effect of cross-sectional parameters on the local buckling behavior of a rectangular hollow section (RHS) under lateral compression is examined in this study through finite element modeling and optimization. The finite element model was first validated against experimental data. With good agreement observed between the experimental and FEA results, the validated FEA model in ABAQUS was used in conjunction with Isight to conduct an optimization study and examine the influence of cross-section parameters on the buckling behavior of the section. Cross-sectional parameters considered included the aspect ratio of the section, the thickness to width ratio of the web and the thickness to width ratio of the flange. For a target buckling load and given definite ranges of the width, height, flange thickness and web thickness, the best combination of parameters was arrived at using the optimization software Isight.

Customer Papers

Bird strike Simulation helps in assuring aircraft safety, in eliminating cost & effort required for practical tests. There has been significant research done on various ways of doing bird strike simulation, till date Aerospace & defense Industry is concerned with two key issues 1.Comparative assessment of available methods 2. A FE model for fastener failure and fastener hole embrittlement. Current paper addresses relevant issues for today’s industry towards a universally accepted method of bird strike analysis Finite element based computational methods.

Customer Papers

In order to facilitate the application of thermoplastic composites in the automotive industry for weight saving and fuel economy, an advanced simulation approach is applied to evaluate the performance of an injection molded short fiber reinforced composites beam. A fully coupled Digimat with Abaqus homogenization method for multi-scale modeling is explored and compared to an uncoupled Digimat with Abaqus approach which uses an Abaqus User subroutine. A failure model is calibrated to predict short fiber reinforced composites failure. The results obtained with this model are presented, demonstrating accurate prediction results. The developed model with homogenization features is able to distinguish the behavior of beam with different injection molded process and is validated by comparing predicted results with experimental data of beam flexure test under different boundary conditions.

Customer Papers

Customer Papers

Don’t Drop That! Fulfilling Consumer Expectations of Robust Mobile Devices

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Simulating the human body is complex, and detailed models have been used to describe aspects of its physiology. Examples of applications include simulated crash tests, joint replacements and even a modelling of a beating heart. When evaluating a product interacting with the body, the body may not be the primary analysis objective, but rather is a necessary participant in the simulation. Disposable personal care products, such as absorbent incontinence garments or feminine care offerings, often interact intimately with the body and are intended to fit a range of body sizes and shapes. Virtual evaluations of these products often consider many body sizes and shapes; however, the cost of complex human models for product evaluation can limit the number of use cases considered. Here, cost refers to the price and resource expense of obtaining geometry, creating a finite element definition and the computation of the model. This paper describes techniques used to provide low cost virtual articulated humans suitable for product evaluation.

Customer Papers

Heat exchangers are essential components in many engineering processes in industries. Helical baffle and segmental baffle are two major types of shell and tube heat exchangers. Helical baffle heat exchangers offer lower pressure drops and higher heat transfer efficiency as compared to segmental baffles. In present work, numerical simulations are performed on a helical baffle heat exchanger using 3DEXPERIENCE flow simulation application to predict heat transfer and pressure drop. Since helical baffle inclination angle is an important design parameter, a parametric study is carried out to evaluate its effect on pressure drop and heat transfer. Optimum baffle angle found in the present study is baffle angle of 350 for which pressure drop and heat transfer is best.

Customer Papers

Expandable sand screens are a sand control system, which is used to control the ingress of solids in oil and gas reservoirs with weak and unconsolidated formations. There are two different variations of expandable screens; a system based on a slotted basepipe which are easy to expand compliant to the formation but is relatively low in strength and a system based on a drilled basepipe which is very strong but is more difficult to expand compliantly. The model was used to study the effects of formation screen interactions in inclined wellbores, through multiple rock layers. The model is also routinely used to study new applications for potential problems.

Customer Papers

Automotive engine valves draw the air and fuel into the cylinders and allow the exhaust gas out. The valves are under various loads during the engine running: a combustion pressure, a spring force, thermal loads and the impact force due to valve closing speed. Their combined loads sometimes lead a valve fracture. In this paper, the failure behavior in the exhaust valve is investigated with the finite element methods. An implicit time integration method is used to simulate the transient dynamic behavior of the valve. The stresses results by FEA were in good agreement with the measured data under a valve train rig test.This study showed the durability of the valve neck, the most common failure position, is subject to various factors such as the partial contact due to the thermal deformation of the valve seat, the degradation of material strength due to high temperature, the dynamic load when the valve closes.

Customer Papers

Concrete anchors are critical fastening elements in transferring structural load to concrete foundation. In this case study, cast-in-place mechanical anchors with local reinforcement were modeled using SIMULIA Abaqus. Steel anchor bolt and rebars were modeled using elasticplastic material, and concrete slab was modeled using concrete damage plasticity model. Because of the large model, contact, and damage failure procedure were involved, parallel computing had to be employed to speed up the solution process. The UberCloud HPC Experiment provided a great opportunity to tap into HPC resource in the cloud.

Customer Papers

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