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Shear Loading

Shear Loading

In this procedure, the compressive force is applied by clamping the specimen, i.e. via a frictional contact. It was standardized in the 1980s in ASTM D 3410 as the Celanese testing tool with conical clamping elements and further developed in various standards. 

Under the Celanese arrangement, deviations in specimen thickness lead to unwanted linear support of the clamping elements. DIN 65375 and prEN 2850 offer modified Celanese tools with flat wedges to solve the problem of specimen thickness. 

The IITRI developed a similar tool, which nowadays replaces the old Celanese compression tool in ASTM. This tool - like the predecessor model - works on the wedge clamping principle. The wedge jaws are first aligned on the specimen outside the compression tool and then placed into the compression tool. 

IMA Dresden developed and patented the hydraulic compression tool HCCF. It has very good accessibility, simple handling and fixed jaws, which remain precisely aligned to each other even during the test procedure. The parallel hydraulic specimen clamping is stick-slip free, unlike the wedge-based principles. The use of a clip-on extensometer is possible.


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