puristuskoeella

Puristuskoeella is a Finnish-language term that appears in discussions of material testing. The word combines puristuskoe, meaning compression test, with the adessive suffix -lla, producing a form that can be translated roughly as “in the compression test” or “the compression-test setup.” In practice, puristuskoeella is used to refer to the specimen or the fixture in which a specimen is placed during a compression test, or more broadly to the configuration of equipment and procedures used for such testing. The exact usage varies by author, and the term is not a standard designation in formal testing standards.

In a typical compression test, a specimen is aligned between the jaws of a universal testing machine or servo-hydraulic tester. Load is applied along the specimen’s axis while displacement or strain is measured. From the force–displacement data, engineers derive properties such as compressive strength, modulus of elasticity in compression, yield behavior, and ultimate compressive strain. The geometry and preparation of the specimen—often cylindrical or prismatic—affect the results; test setups described as puristuskoeella may include details about alignment, end conditions, lubrication, and surface finish.

Standards for compression testing are maintained by international and national bodies such as ISO, EN, and ASTM, and are applied across metals, ceramics, polymers, and composites. In practice, reports describe specimen dimensions, loading rate, temperature, humidity, and any conditioning or testing-specific notes. While puristuskoeella is not a fixed technical term in all Finland-based literature, it serves as a shorthand for discussions about the compression-test configuration and the associated data interpretation.

See also: compression test, universal testing machine, material testing standards.