265 words | 1 minute read

Endurica CL now uses multithreading to quickly create high resolution Haigh diagrams. The Endurica Viewer can set axis limits for Haigh diagrams, and has improved plotting to create a smoother contour plot. Endurica Viewer also has a READ MORE
Haigh diagram graphic before 2023-0601 release
Updated Haigh diagram graphic output
Crack Growth or Continuum Damage?
Endurica does both
965 words | 4 minute read

The topic of whether to use a crack growth method or a continuum damage method for product fatigue and durability assessment has long been debated. Oftentimes, experts will recommend using a continuum damage approach in the initial phase, when no noticeable cracks are present, and then transition to a crack growth analysis when damage has reached a certain level where READ MORE
Predicting Residual Casing Life
of a Tire following an Impact Event
We are excited to share with you a Research Article published June 22, 2023 in Tire Science and Technology by Gobi Gobinath, Thomas Ebbott, and Shannon Hughes.

ABSTRACT: By applying recognized engineering methods, including finite element analysis, the role of impact events on the service life of a tire was studied by varying three factors: speed of impact, treadwear, and angle of impact. The approach combines well-known finite element analysis methods to simulate a tire rolling over an obstacle with the calculation of damage at the tire belt edge imparted by the impact event by using recognized methods of rubber fatigue analysis. An efficient method is developed and used to demonstrate that across a range of impact conditions, some conditions can cause substantial internal damage, whereas other conditions can cause very little damage. The area of investigation is the tire belt edge; thus, although significant internal damage may have occurred, it might not be visually perceptible in the normal operation of a vehicle. In some cases, the nondetectable damage is shown to propagate to a point where the tire loses its structural integrity before reaching its normal operating life defined by treadwear. This study includes the role of mechanical, temperature, and rate effects.

Endurica Selected as Technology Partner
in Department of Energy Grant to Coreform
to Explore Simulation of Advanced Tire Tread
Simulate fully detailed CAD tread models without time-consuming tread meshing
with isogeometric analysis
410 words | 2:00 minute read

Innovative tire tread computer simulation processes aimed at accelerating the use of simulation in the tire industry is the mission of an exploratory grant awarded to Coreform by the United States Department of Energy (DOE). The firm will apply Coreform IGA, their isogeometric analysis (IGA) technology -- which replaces difficult and time-consuming portions of computer simulation work while providing greater design clarity and detail -- to the simulation of the advanced tire tread patterns required by emerging vehicles. To fully implement the grant’s scope, Endurica has been selected as a technology partner to provide key tire industry endurance evaluations including rolling resistance, heat build-up and wear behavior.
“Coreform’s technology promises to revolutionize simulations involving complex geometry,” explains William V. Mars, Ph.D., P.E. founder and President of Endurica. “and tire tread patterns are an extremely important example of complex geometry. We are honored to be included in this important research for both the DOE and the tire industry.”

Traditional finite element analysis (FEA) first requires geometry to be defeatured and meshed which can be both time consuming and relationally inaccurate. IGA was introduced in 2005 to run simulation directly on the design model, leveraging the power of splines. Thousands of scientific papers have been written on this approach and Coreform’s novel “Flex IGA” technology unlocks these benefits in a commercial setting. Coreform IGA provides a full spectrum of input options and flexible modeling, allowing engineers to minimize manual effort for a desired solution solve time.

“Greater use of predictive simulation analysis for advanced tire tread designs will reduce the cost of product development and accelerate the adoption of both electric and self-driving cars,” explains Coreform Chief Strategy Officer Matthew Sederberg. “We anticipate this project will help the tire industry develop innovative tread patterns to reduce noise and improve energy efficiency.”

Greg Vernon, Director of Engineering at Coreform, says Coreform’s approach will use isogeometric analysis to allow tire manufacturers to test new designs much more quickly. “Down the road, that will mean fewer particulate emissions, longer life, and better energy efficiency for all of us.”

Coreform develops next-generation computer-aided engineering software. Among Coreform’s founders are authorities in isogeometric analysis and widely cited researchers in the computer science field. The Coreform IGA solver is based on smooth CAD spline geometry, offering greater accuracy than the faceted meshes used in legacy CAE software. Coreform is also the exclusive commercial distributor of the Cubit meshing software. Founded in 2014, Coreform is headquartered in Utah, USA.
A junior in the Asian Studies program at Bowling Green State University, Nick joins us for the summer through the Ohio Export Internship Program. He has been busy researching/reaching out to resellers based in Japan, helping with international logistics details and documenting the details of Endurica's entry into the Entrepreneurial Operating System. He is looking forward to January 2024 and his semester abroad in Japan at Nanzan University in Nagoya.
Coming Events 2023
Endurica and our Fatigue Ninja invite you to the next Fatigue Ninja Friday webinar on migrating to the newest versions of our software in the Katana architecture . Webinar to be held 6 October 2023 at 9 am EDT
Fatigue Ninja Friday events are deep-dive training sessions on new features in our software codes. These webinars are presented at no charge to our users. If you are a client and are not receiving invitations to join us please email Pauline Glaza.
October 4-5, 2023
Huntington Place, Detroit, Michigan, USA
Dr. Mars is a Keynote Speaker at the IEC
Live, Online: October 30 - November 3, 2023 | 3 hrs/day + Office Hours
Last chance for this workshop in 2023
13th International Fatigue Congress
November 6-10, 2023
International Conference Center - Hiroshima, Japan
Live, Online: December 5-8, 2023 | 3 hrs/day + Office Hours
Last chance for this workshop in 2023
Rubbernecking is an interesting thing that makes us look twice

2022 Charles Goodyear Medalists Steven Cron and Tim Rhyne -- Interview by Dr. Will Mars

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