Careful How You Use DIC for the Extraction of FLC Points!!!
Webcast
(30 minutes)
In sheet formability testing per ISO 12004-2, many DIC-processing and post-processing parameters could have significant impact on the extracted FLC points; unfortunately, the user may not realize their impact simply because they are hidden or implicitly related to hard settings in commercial DIC softwares. This webcast addresses this important issue, highlighting the pitfalls and issues that usually lead to discrepancies in FLC results within or across different
testing labs.
Featured topics:
DIC in Support of Fracture Testing:
Opportunities & Challenges
Webinar
(60 minutes)
Calibration of fracture models requires a suite of mechanical tests that cover a wide
spectrum of loading conditions (the most critical of which are balanced biaxial tension
(BBT), plane-strain tension (PST), uniaxial tension (US), and pure shear (SH)). While
these tests are well-known, achieving the intended stress-triaxiality that corresponds
to each one of these loading cases could be difficult.
In this presentation, we shed some light on this important topic and present the
integration of digital image correlation (DIC) with mechanical testing to support the
development and refinement of “fracture testing”. We show how DIC can assist in tracking
the evolution of stress-triaxiality in the material, thus enabling the optimization of
fracture test sample geometries. On the other hand, we dedicate a significant portion of
this webinar to cover the limitations of using DIC in calibrating fracture material
cards, highlighting the technical challenges and drawbacks that require significant
attention beyond the simple use of DIC as a trusted-tool for reading local strains
around the fracture point!
Are Aluminium Alloys Truly Strain Rate Insensitive?
Webcast
(30 minutes)
This webcast sheds some light on the topic of strain rate sensitivity of aluminium alloys; are they all truly insensitive to deformation rate or are there varying degrees of sensitivity depending on the alloy or series! Moreover, how to fully characterize rate sensitivity; by strength? ductility? or other parameters?
The webcast will also cover some of the challenges of high speed material testing and high speed digital image correlation (DIC).
Featured topics:
Sheet Metal Formability Testing with DIC
Part-I: For Evolving Automotive Materials
Webinar
Despite the introduction of new classes of lightweight materials and manufacturing techniques, “stamping” of steel sheets is still the dominant manufacturing approach for mass production of automotive body structures. That being said, there are still many new grades of steel and high strength aluminium alloys that are progressively introduced to the sector, thus posing evolving challenges both in terms of manufacturing and material characterization for forming simulations (FEA).
In this webinar, we shed some light on the topic of “material formability” with focus on the automotive sector. We cover the main formability testing approaches and how they are used to test the wide range of automotive materials. Beyond conventional steels, particular emphasis will be made to addressing the needs of the industry in testing the latest generations of advanced high strength steels and aluminium alloys. Digital image correlation (DIC) is of critical importance to formability testing, thus we dedicate a portion of this webinar to the integration of DIC with formability testing, and the use of DIC to extract FLC points via different algorithms/approaches.
YES … 2D DIC is Still Powerful & Effective
for Many Material Testing Applications!
Webinar
In a recent webinar hosted by ASM International, we presented several cases in which 2D DIC
could be used effectively for in-plane mechanical testing, and we showed preliminary data to
support this concept. The webinar received significant interest and led to many questions
and requests for additional information! In this webinar, we present an expanded more
comprehensive study in which detailed direct comparisons between 2D and 3D DIC measurements
are carried out for selected material testing scenarios. We share results that demonstrate
how 2D DIC can match (with negligible deviations) the output of 3D DIC, if done correctly.
The goal is to promote the use of DIC and enable those with limited access to 3D DIC to
still take advantage of 2D DIC and capitalize on the benefits it brings in enriching
investigations of material deformation & failure.
Note: all project files (images, physical quantities, and even compiled DIC files) will be
made available for everyone to process and further evaluate as needed. Some datafiles will
be packages specifically for academia for use as training projects in classrooms.
How Effective is 2D DIC in Material Testing? Webinar
Digital image correlation (DIC) has become an important tool in material testing practices
for the advanced characterization of materials in a wide range of applications. Despite
that, the cost of a commercial 3D DIC system might still be a hurdle for many educational
institutions, and even for some industrial establishments! 2D DIC is simple, inexpensive and
easily attainable, yet it lacks the accuracy and depth of field capabilities of 3D DIC.
Despite this limitation, there are many testing scenarios where material deformation is
planar and thus 2D DIC can capture material deformation with sufficient accuracy.
This webinar aims to address this important issue by presenting direct technical comparisons
between 2D and 3D DIC measurements for selected material testing scenarios. The ultimate
goal is to enable those with limited access to 3D DIC to still take advantage of 2D DIC and
capitalize on the benefits it brings in enriching investigations of material deformation &
failure.
High Strain Rate Tension Testing of Lightweight
Materials for Automotive Crash Simulations
Webinar
This webinar/demo sheds some light on the topic of high strain rate testing, and provides
information supported by examples on how reliable high speed material characterization data
can be obtained to support automotive CAE crash simulations. An overview of the latest
generations of high speed testing machines and systems is first provided, then some testing
technical details (test samples, test procedure, the use of DIC, issues with high speed
testing, etc.) are discussed.
A live demonstration is also performed to provide hands-on experience and give the audience
a feel of the details involved in high rate tension testing.
Finally, high speed testing results obtained with some of the latest generations of
lightweight automotive materials are presented, and the influence of deformation rate on
material behavior is discussed.
