Why this test matters
When materials are used in structural or load-bearing applications, they must resist bending forces without cracking or deforming. The flexural test shows how strong and rigid a material is under bending stress, and how well a coating holds up when the part beneath it flexes or bends around a curve. It applies to metals, plastics, composites, ceramics, and coatings, wherever a product needs to keep its shape and function under load, or a coating needs to stay intact when its substrate bends during forming or in service.
How the test works
We offer two ways to test flexural behavior, depending on what you need to know. In the three-point bending test, a prismatic sample rests on two supports and is loaded with a transverse force in the middle until it deflects or breaks, giving you flexural strength, modulus, and strain at break. For coatings, we use the mandrel test instead: a coated panel is bent around a cylindrical or conical mandrel, then checked for cracking or other damage, or its elongation before failure is calculated. Both tests can run at room temperature or be adjusted to simulate specific environments such as heat or humidity.
What you learn from this test
From the three-point bending test, you get flexural strength and modulus values that show exactly how much load your material can take before it deflects or breaks. From the mandrel test, you learn whether your coating stays intact when its substrate bends or forms, and how much elongation it can handle before cracking. Together, these results let you compare materials or coatings, validate a product design, and confirm compliance with the mechanical standard your application requires.
