This presentation outlines the structural stress method in nCode DesignLife, nonlinear generalized reduced gradient algorithm, and the data processing procedure.
This presentation reviews the dynamics and frequency response function, using finite element analysis for structural and durability predictions, what's important in fatigue, the role of vibration in fatigue, and improving FEA and fatigue analysis with experimental modal analysis.
This article will review F.D.S calculation for engine components, compare test profiles F.D.S against the application F.D.S, compare enveloped F.D.S and PSDs, and use FEM and transfer function with F.D.S.
This presentation reviews how to create durability tests, introduces reliability to the durability test, and demonstrates Reliasoft Weibull++ software.
This presentation reviews the material characterization and strain energy damage parameter of short fiber injection molded composites and examines the failure criteria of continuous fiber composites.
An overview of Modal Analysis, a product option in nCode VibeSys for identifying modes of vibration and extracting modal parameters. It can also animate mode shapes or display Operating Deflection Shapes (ODS).
This brochure outlines the product options and benefits of using nCode GlyphWorks for performing durability analysis and processing measured test data.
This presentation reviews the analysis of fatigue of seamwelds, using structural stresses for fatigue analysis, shell element approach in nCode DesignLife, solid element approach in nCode DesignLife, and new weld features.
This presentation outlines how Tower Internation used nCode DesignLife's virtual strain gauge tool to correlate between an SWB and LWB component strains.
This presentation reviews material modeling (metals to composites), multiscale modeling, fatigue material modeling- composites, and how to generate the composite damage model.
This paper describes how the vibration environment of an aircraft can be characterized in terms of a Fatigue Damage Spectrum and Shock Response Spectrum. It describes how these spectra are calculated from both measured flight load data and from vibration test specifications.
Vibrating components are highly susceptible to fatigue failure. Fatigue occurs through long term exposure to time varying loads which although modest in amplitude give rise to microscopic cracks that steadily propagate to failure.
This paper will show that the required qualification specifications of an engine mounted component are largely conservative in some frequency ranges. However, they also under-estimate vibration levels at others.
AgustaWestland, the helicopter division of Finmeccanica, is successfully using nCode GlyphWorks® analysis software to assess these new designs through more efficient and representative testing.
This presentation reviews and outlines the processes for turning invalid tests into useful information, comparing alternate supplier test qualifications, and duty cycle/time history damage editing.
Kyle Dart discusses how nCode GlyphWorks was utilized at Toyota Technical Center to process very large data files from a telemetry-based data acquisition system and benefits seen from using the software.
This presentation outlines how Bombardier Transportation utilized nCode GlyphWorks to develop processes to carry out data analysis to BS EN14363 Railway Applications – Testing for the acceptance of running characteristics of railway vehicles – Testing of running behaviour and stationary tests (simplified method).
This presentation reviews the process of how John Deere leveraged nCode GlyphWorks software to create a composite random vibration profile from field acceleration data.
Valeo is one of Europe’s largest car parts suppliers, providing components for nearly all global car manufacturers. Valeo worked with HBM-nCode to implement this approach in nCode GlyphWorks test data analysis software and uses it to generate synthesized signals to drive fatigue test systems.
Failure of an aerospace component can arise through the long term exposure to fatigue damaging events such as large numbers of low amplitude random events and/or relatively fewer high amplitude events. Mission profiling and test synthesis is a process for deriving a simple laboratory test...
Vibrating components are highly susceptible to fatigue failure. Most components must fulfil some form of durability certification test prior to production. Tests are conducted on real prototype components or use a CAE based simulation of the component...
This article presents a methodology which enables to superimpose a swept sine and a power spectral density of acceleration to check the mechanical durability of engine or gear box-mounted components.
In order for Automotive OEMs to meet specific reliability levels, they need to design vehicles using loading conditions based on realistic customer usage. This paper illustrates how to Optimize the mixture of proving ground track surfaces to achieve a close match to the target customer profile.
An overview about the Advanced Materials Characterization and Test facility test operated by HBM Prenscia. The AMCT assists developers in taking the right design decisions, based on reliable information about raw and manufactured materials.
This paper reviews methods for performing fatigue analysis from PSDs and shows that the Dirlik method gives the best comparable results with the traditional time domain approaches.
This paper describes a device and an algorithm which is capable of real-time analysis of the Vibration Damage Dosage (VDD) of components mounted on a helicopter platform.
Bombardier Transportation now uses nCode GlyphWorks test data analysis software to automate this process, reducing the time required to analyze test data...
Cummins Power Generation is a world leader in the design and manufacture of diesel engine generator sets, spark-ignited natural gas and propane engine generators and lean-burn gas engine operators. GlyphWorks was selected because of range of data processing capabilities including...
Engineers are often overloaded with data and can waste much time looking for the data they require. A new solution enables meaningful search and automated processing (UKIP Automotive Testing Technology November 2009).
With the need for more structural integrity monitoring of the airframes in the heavy airtanker fleet, the Forest Service used nCode Automation from nCode International to help them do just that…
New technology for proving ground-schedule development enables durability engineers to get best value and minimize test time (UKIP Automotive Testing Technology November 2010)
An overview of Accelerated Testing, a product option that provides the ability to create a representative PSD or swept sine shaker vibration test based on measured data
The Accelerated Testing product option addresses the need for reduced development times, while retaining the realism of proving ground durability tests. Reproduced with kind permission of Automotive Testing Technology International.
This paper shows the durability aspects of the development process of a photovoltaic-system substructure including design, finite element structure analysis, and fatigue analysis.
The paper describes the fatigue analysis of a welded joint in a pressure vessel subjected to road transport loading. It describes the method used to recover the stresses that are critical for this fatigue analysis using the commercial software nCode DesignLife.
This article will discuss Load reconstruction methods, common factors, Modification of the simple spectrum, transition cycles and cyclic residual stress, an MIL-A-8866 cargo transplant spectrum.
This paper reviews the source of vibration loading on a helicopter and describes standard qualification tests that are used to ensure the safe life of equipment on the aircraft.
This paper describes the use of virtual strain gauges in order to correlate a full scale structural test of a helicopter with a finite element model. It focuses on the correlation of bending and torsion moments in the tail cone. These arise from lateral loads applied at the tail.
This paper introduces a new 'Terrain Sensing System' (TSS) that is able to record the cumulative damage seen by a ground vehicle over its entire operational life. Used within a HUMS IT process, this information can be calibrated to represent directly the residual life of onboard equipment.
Traditional fatigue analysis uses a technique called rainflow cycle counting to decompose a variable amplitude time signal of stress into fatigue cycles. The damage from each cycle is computed using a Wöhler curve and the damage over the entire time signal is calculated...
This lecture shows a virtual durability product development process to predict fatigue life of short fibre reinforced materials. The multi-disciplinary process consists of manufacturing simulation, followed by finite element structural analysis, and a fatigue calculation performed with DesignLife.
This paper reviews the source of vibration loading on a helicopter and describes standard qualification tests that are used to ensure the safe life of equipment on the aircraft.
The identification and removal of rotor harmonics from in-flight operational data provides a key to the analysis of helicopter dynamics. This paper presents a technique for harmonic removal from operational structural response data with little or no effect on the underlying dynamic properties represented by the signal.
This paper describes a procedure for multiaxial fatigue assessment of composite structures, based on finite element models. It is targeted primarily at short fibre injection moulded materials, but with potential for application to other manufacturing systems, including laminates.
An overview of Composite Analysis, a product option in nCode DesignLife that allows users to evaluate the strength of a structure against industry standard composite failure criteria.
Fatigue design of mechanical parts may be based on ideal ones, without taking into account their real geometry. This communication addresses some ways to take into account the process of a mechanical part in its fatigue design computation.
Welding is used in many industries as an effective and economical method for making structural joints between metal parts. However, the nature of the welding process means that welded joints generally have a fatigue strength that is inferior to that of the parts being joined together.
This paper reviews some modern durability management philosophies and the computer based tools available to meet the needs of design, test and development engineers.