Our latest vlog highlights the DART™, our turn-key, industry-leading tool for precise, reliable, and efficient near-surface residual stress measurements. The Device for Automated Residual stress Testing is capable of multiple measurement techniques including hole drilling and TrueSlot®. This flexibility allows for easy adaption as new applications arise.Continue reading Introducing the DART – HE Vlog
Our latest case study highlights the many benefits of the DART™ automated measurement system, a tool we at Hill Engineering developed specifically to improve near-surface residual stress measurement techniques such as hole drilling and TRUEslot®.Continue reading Case Study: DART – automated residual stress measurement
Near-surface residual stress data is critical when assessing material performance, optimizing design, validating models, evaluating field failures, and executing quality assurance programs. Hill Engineering’s DART™ is an industry-leading tool for efficient, precise, and reliable near-surface residual stress measurements. The DART™ overcomes limitations of existing residual stress measurement equipment and includes everything required to perform state-of-the-art measurements in accordance with industry specifications.
A single DART™ can perform near-surface residual stress measurements using multiple techniques including hole drilling
and TRUEslot® methods. This flexibility is helpful when requirements change or new applications arise. The DART™ executes hole-drilling residual stress profile measurements in accordance with ASTM E837, providing a depth profile of the three in-plane residual stress components in a single measurement. TRUEslot® is a novel technique, like hole-drilling, but simpler and more precise. TRUEslot® provides a depth profile of one stress component per measurement.
Residual stress measurements with the DART™ are easy to complete. A user interface guides you through set-up, then takes over for automated measurement execution and residual stress calculation.
With measurements completing in less than 60 minutes, the DART™ excels in the production quality management environment. Automated data capture, processing, and archiving provide you with residual stress results instantly.
Featuring advanced cutting strategies and real-time quality checks, the DART™ gives you confidence in your residual stress data.
• Hole drilling residual stress measurements according to ASTM E837
• TRUEslot® residual stress measurements
• Positional accuracy: ± 0.001 in.
• Works on most materials including: aluminum, titanium, steel, stainless steel, and nickel alloys
• Custom fixtures can be integrated to meet the needs of individual applications
• NFPA 79 compliant
Each DART™ includes a complete software package that enables efficient and repeatable residual stress measurements for high-volume or single-use applications. DART™ software is designed for ease-of-use, while maintaining flexibility to meet your measurement needs and providing controls to maximize reliability. An operator defines the measurement location, the type of measurement (TRUEslot® or hole-drilling), and inputs the key measurement details. Following set-up, the software automatically controls the incremental material removal process, acquires the experimental data, computes residual stress, and outputs a test report. The entire process is significantly more efficient than other available tools.
DART™ produces the highest-quality residual stress data available
Precise engineering and extensive use of automation within the DART™ provides a demonstrated 50%+ improvement in measurement repeatability relative to other hole drilling test equipment. Hole drilling and TRUEslot® measurements performed using a DART™ have been shown to be 60%+ more repeatable than X-ray diffraction measurements.
The DART™ has proven to meet our high internal standards for data quality and is currently in use in multiple facilities throughout the world. It could be in your facility soon.
To place an order for DART™ related goods or services, please contact us.
DART™ and TRUEslot® are protected by US Patent 10,900,768 and are patent pending for other international jurisdictions.
Hill Engineering recently participated in the virtual 2020 United States Air Force Structural Integrity Program Conference (ASIP). The ASIP Conference is specifically designed to bring together the world leaders in the area of aircraft structural integrity and to disseminate information on state-of-the-art technologies for aircraft structures in both the military and civilian fleets. Hill Engineering’s presentation included a summary of recent work related to developing a digital quality assurance record for typical aircraft maintenance processes like hold hole expansion. The abstract text is presented below along with a copy of the presentation slides.Continue reading ASIP conference 2020
On your mark, get set, GO!
Hill Engineering isn’t just at the forefront of the residual stress measurement world, our employees are picking up the pace as well! The race pace that is. Today, we’re highlighting a few of our team members who cut through speed and strength like a wire EDM. Continue reading Racers of Hill Engineering
If you aren’t subscribed to our YouTube channel, we’d like to announce that our latest vlog is now live. Continue reading Vlog: How to Use the Nikon ModelMaker H120 3D Scanner
2016 was an exciting year at Hill Engineering. We accomplished so much and we wanted to take a moment to recognize some of the highlights. Continue reading 2016 Highlights at Hill Engineering
The Hill Engineering employees took a quick break from all the residual stress analysis to partake in a few fall-themed festivities this season. We recognize that enjoying quality time together is an important way to strengthen our resolve as a team. What better way to do that than through everybody’s favorite activities: pumpkin carving and food! Continue reading A Feast of Fall Festivities
Hill Engineering is presenting about fatigue analysis methods for cold expanded aircraft fastener holes at the upcoming 2016 Aircraft Structural Integrity Program (ASIP) Conference in San Antonio, TX. Cold hole expansion is a method commonly used to induce compressive residual stress around the perimeter of fastener holes, which are common in aircraft structure. The compressive residual stress has significant benefits related to fracture and fatigue of the structure. Hill Engineering’s presentation will include a summary of current analysis methods and a plan for how these methods can evolve to allow for improvements in aircraft design and sustainment. The abstract text is presented below. Continue reading ASIP Conference