Why is determining shear modulus for polyurethane parts important?

Elastomers are typically used in shear for parts such as mounting brackets and suspension assemblies. These types of applications are chosen because elastomers will deflect much more easily in shear than in compression. Shear loading is a combination of tension and compression forces. Since polyurethane has high load bearing capacity in tension and compression, it also has high load being capacity in shear.

Shear is the ratio of deformation to elastomer thickness. Shown below is a table representative of the shear modulus of several different Gallagher Corp polyurethane compounds. We encourage you to watch the video to learn more about polyurethane in shear and see how we determine the shear modulus in our materials testing lab. Please contact us for more information and to see how we can put our material to work for you.

Shear Modulus (Quad Shear Method), psi (MPa)

Compound Hardness Shear Modulus, G
960 60A 180 (1.2)
1280 80A 470 (3.2)
1285 85A 745 (5.1)
1290 90A 920 (6.3)
1090 90A 1300 (8.9)
1095 95A 2400 (16.5)
1575 70D 12,300 (84.8)
shear modulus

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Bring us 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, Ill. 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 as your chosen polyurethane manufacturer . . . where you can be confident that you’ll always have your toughest demands – delivered.