Fatigue is an important consideration in the design of parts for cyclic dynamic applications. Fatigue and cut growth resulting from cyclic stress-strain are related. When testing for fatigue resistance for a specific application, it’s important to test at a strain energy experienced by the part in actual service.

Strain energy is a function of both the modulus of the material and the strain cycle the material sees. Also important with polyurethanes is to test at various levels of stoichiometry (polymer to curative ratio) because we have seen dramatic improvements in flex fatigue resistance by this chemical adjustment.

This is another reason why teamwork between the design engineer, the product engineer and our chemists is so important to problem-solving.

Why Choose Gallagher For Your Custom Cast Urethane Needs?

Continuous Advancements in Polyurethane Expertise and Equipment

Bring Gallagher even the trickiest requirements of your most important components, and time after time, we turn them into success at our 100,000-square-foot, ISO-certified facility in Gurnee, Illinois. Meanwhile, as your demands keep getting tougher, we’re always reinvesting in our business, constantly enhancing our expertise and continuously improving our operations with new machinery, new processes, and new materials to meet your evolving needs.

It’s all part of a culture of commitment to your needs that you’ll find only when you partner with Gallagher . . . where you can be confident that you’ll always have your toughest demands – delivered.