Stress-strain behavior is crucial for design engineers in application development. Accurate prediction of stress-strain curves simplifies material selection and reduces delays. Envalior’s advanced Stress-Strain Tool enables users to determine curves for various materials under specific conditions like temperature and humidity, accelerating validation and ensuring precision throughout the design process.
Envalior’s Stress-Strain Tool is a game-changer for design engineers looking to validate and optimize application designs efficiently. Simply input the material grade, temperature, and relative humidity into the tool, and it instantly generates the stress-strain curve, along with key values like tensile modulus and strain-at-break. This data can then be compared across materials to identify the best fit for your application.
While the tool currently focuses on temperature and humidity, it’s essential to note that other factors, like strain rate and fiber orientation, also influence stress-strain behavior. The tool provides data at the standard quasi-static strain rate for ISO527-1A standardized injection-molded specimens, ensuring consistent and reliable results.
The Stress-Strain Tool is particularly beneficial during the concept and detailed design phases of product development. At this stage, meeting stiffness and strength requirements is often evaluated using finite element (FE) simulations. The quality of these simulations heavily depends on the accuracy of the material data, making the stress-strain curve a vital input. In case support is needed to derive material cards for FE simulations, from a set of stress-strain curves, please contact our CAE experts.
By offering accurate predictions, the tool reduces lead times significantly compared to traditional methods of measuring stress-strain curves or interpolating data for untested conditions. The output can be downloaded directly into an Excel file, allowing teams to keep projects on track without delays. Additionally, Envalior provides a wealth of pre-measured stress-strain data for various grades and conditions, available in datasheets and on PlasticsFinder.
Envalior’s Stress-Strain Tool is powered by a robust database of measured stress-strain curves across numerous material grades. Advanced polymer-physics models assess the effects of temperature, moisture, glass fiber content, and orientation on critical curve descriptors like modulus, stress-at-break, and strain-at-break. Where necessary, machine learning algorithms enhance the accuracy of predictions, ensuring results within 10% of actual measurements.
The tool is continually updated to include additional grades, moisture conditions for polyamides, and factors like filler orientation and strain rate. As part of Envalior’s MaterialAdvisor suite, the Stress-Strain Tool complements other industry-leading digital services, including calculators for creep, fatigue, thermal expansion, chemical resistance, and heat aging. Additionally, the Failure Modes Advisor offers insights into potential failure points and mitigation strategies, further supporting engineers in delivering high-performance designs.
By leveraging the Stress-Strain Tool, you can ensure faster, more accurate predictions during your product development cycle. Explore the advantages of Envalior’s digital solutions to optimize your projects and reduce lead times. Contact us today to learn more about how our innovative tools can transform your design process.
Senior Design Engineer, Envalior
Lucien Douven is responsible for the development of advanced CAE tools, based at the Envalior Materials Center in the Netherlands. He holds a PhD degree in Mechanical engineering, from Eindhoven University of Technology.
5 May 2025
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