In addition to being a sought-after lecturer, Mars has served as editor in chief of both Rubber Chemistry and Technology and Tire Science and Technology. He holds four patents in the area of elastomer durability, and his work has appeared in more than 60 peer-reviewed scientific publications.
He has accomplished a number firsts, establishing a reputation for success in the rubber industry, including the authoring of Endurica fatigue life solver—the world's first commercially available simulation for fatigue analysis of rubber.
Mars was the first to conceive of critical plane analysis for computing fatigue in elastomers, enabling accurate analysis of multiaxial load histories that occur in tire service. He also was the first to propose and validate a model for R-ratio effects on fatigue in crystallizing rubber, a critical factor in determining the durability of tires because the sidewall often operates under R>0 conditions (ie nonrelaxing).
Regarding elastomer fatigue analysis, Mars was the first to develop an incremental calculation method for the rubber industry, enabling residual life calculations and digital twins, as well as simulation of FMVSS durability and high-speed protocols for tires.
He also was the first to successfully explain—using critical plane analysis—why cracks nucleate at an angle in nonrelaxing simple tension tests of strain crystallizing rubber.
Among his accomplishments, Mars has generalized Futamura's deformation index concept to explain fatigue differences arising due to stiffness changes in rubber. This is of particular use to compounders working to understand the tradeoffs between stiffness, mode of control and durability.