The Structural Integrity Toolbox is a suite of desktop applications for fatigue analysis, load sequence processing, probability of detection and reliability assessment — built on established methods, with every step visualised and traceable.
Built on established engineering methods
The toolbox
Each application addresses a clearly defined task in structural integrity and reliability engineering. All share the same interface: inputs on the left, interactive plots on the right, and a console that logs every step.
Fatigue analysis
Predict crack initiation for any geometry — with or without S-N data.
Crinity performs strain-life fatigue analysis for a wide range of geometries, independent of available S-N data. It generates Kt × DLS (design limit stress) curves that relate the design limit stress to the number of cycles or spectrum passes to crack initiation.
The analysis is built on the strain-life method, Neuber’s rule and Masing’s hypothesis. Variable-amplitude spectra can be imported and manipulated, or constant-amplitude spectra generated directly in the tool.
Load sequences
Turn raw load sequences and sensor data into counted, export-ready spectra.
Losea analyses, manipulates and processes load sequences and sensor data, for example from strain gauges. It counts cycles with the range-pair and rainflow methods in accordance with ASTM E1049-85, Standard Practices for Cycle Counting in Fatigue Analysis.
Multiple views make it easy to understand a spectrum at a glance. Counted and manipulated spectra can be exported in several formats for further processing, including .sub files for AFGROW.
NDT & SHM
Quantify the reliability of NDT methods and SHM sensor systems.
Podex assesses the performance of non-destructive testing (NDT) methods and structural health monitoring (SHM) sensor systems by determining the characteristic probability of detection (POD) curve, using the one-sided tolerance interval (OSTI-POD) methodology.
Before computing results, Podex checks whether the data meets the assumptions of the POD model and tells you whether the OSTI-POD method is applicable. The resulting POD curve and model parameters can be exported for further analysis.
Statistics
Describe the variability in your test data with the right distribution.
Describing the variation in observed data with a probability distribution is a central part of structural reliability analysis (cf. USAF Aircraft Reliability Handbook).
Reliability helps you determine the probability distribution that best models the variability in a set of observations — or fit a specific distribution of your choice — including right-censored data.
Material data
From strain-life test data to material coefficients in seconds.
StrainLife fits the Ramberg-Osgood and Coffin-Manson coefficients to strain-life test data.
Fitted curves are plotted alongside the test data so the quality of the fit can be assessed immediately. Coefficients can be modified with factors, and the resulting curves exported as tabular data.
Data fitting
Quick, visual curve fitting — without writing a script.
CurveFit is built for quick and efficient curve fitting. Import your data, choose a model and get the fitted parameters back straight away.
The fitted function is plotted alongside the input data together with goodness-of-fit metrics, making it easy to judge the quality of the fit.
Approach
Structural integrity assessments frequently depend on in-house scripts and spreadsheets that are difficult to verify, maintain and hand over. The toolbox replaces them with dedicated applications that make every analysis transparent and repeatable.
About
Crinity develops engineering software for structural integrity and reliability analysis. Its product, the Structural Integrity Toolbox, provides engineers with dedicated applications for tasks that are traditionally solved with custom scripts and spreadsheets.
The toolbox originated in applied research at the Lucerne University of Applied Sciences and Arts (HSLU), where its first applications were developed as part of a Master’s programme in mechanical engineering. Having proven their value in subsequent engineering projects, they have since been developed into a coherent product.
The aim is software that engineers can rely on — more efficient, more robust and easier to use than the scripts and spreadsheets it replaces.
Mechanical engineer and software developer. Combines engineering domain knowledge with software development to build tools that fit the way engineers work.
Crinity maintains an ongoing collaboration with the Lucerne University of Applied Sciences and Arts, providing access to specialist expertise across a broad range of engineering disciplines.
Roadmap
Propagates uncertain or probabilistic input parameters through a system model to quantify the variability of its response — for example, to select or size components under varying load scenarios such as wind loads or payload.
Missing an application for a recurring task? Suggestions for new tools and improvements are welcome.
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A single installer includes all six applications. Trial licenses are available free of charge on request.
Structural Integrity Toolbox
Version 0.0.17 · Windows
Structural Integrity Toolbox Setup 0.0.17.exe
1. Install
Download and run the Windows installer.
2. Activate
Request a free trial license by email.
3. Give feedback
Feedback and feature requests directly shape the roadmap.
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