This type of test can measure the fracture and break strength of hard and brittle products (or their flexibility) by bending the sample, usually until a break occurs. If a break does not occur whilst the sample is flexed then a measure of its flexibility can be performed instead – a degree of flexibility can be desirable or a characteristic to be avoided, depending upon the sample. Stable Micro Systems enables a wide range of tests in this field, using fixtures such as the Three Point Bend Rig which are adaptable to many types of sample, and also specialist attachments like the Crisp Fracture Support Rig or the Spaghetti Flexure Rig.
Bending is a combination of compression, tension and some shear. Bending tests are often used in materials testing, possible because they are easy to perform and it is not necessary to fix the specimen to an apparatus. Fracture mostly starts on the outside of the tensed part of the sample and therefore can be observed.
Basic cylinder probes may also be used for fracturability testing, for example, for assessing tablet fracturability in a Diametral Crushing Test. Fracture properties also can be studied by less well defined methods of deformation that may nevertheless yield real material characteristics. Examples are cutting of material, compression and biting between wedges.
When performing tests on samples that fracture or break quickly the duration of this type of test is very short (often less than 1 second). In this case it is recommended that a maximum data acquisition rate is selected, i.e., 2000 points per second, to collect as much detail in the short duration of time as possible.
To view a complete set of fracture/bend testing probe and fixture options click here
What happens during a fracture/bending test?
To see how to perform fracture/bend tests using a TA.XTplus Texture Analyser to measure brittleness, snap force, tip strength, flexibility, force to bend etc., watch this video to see typical fracture and bending tests in action:
There is a Texture Analysis test for virtually any physical property. Contact Stable Micro Systems today to learn more about our full range of solutions.
For more information on how to measure texture, please visit the Texture Analysis Properties section on our website.
The TA.XTplus texture analyser is part of a family of texture analysis instruments and equipment from Stable Micro Systems. An extensive portfolio of specialist attachments is available to measure and analyse the textural properties of a huge range of food products. Our technical experts can also custom design instrument fixtures according to individual specifications.No-one understands texture analysis like we do!
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