The Bundesanstalt für Materialforschung und -prüfung (Federal Institute for Materials Research and Testing, BAM) and Analytik Jena AG have agreed to cooperate extensively in the research and development of optical spectrometry in the area of elemental analysis. The two parties signed a corr ... more
New centrifuge technology will enable multi-sample adhesive and composite strength testing
A new analytical centrifuge is being used to test adhesive bonds, coatings and composites. BAM Federal Institute for Materials Research and Testing’s scientists had the idea that samples should no longer be clamped, but simply inserted. Simply inserting the specimen makes rapid loading possible. In addition, up to eight samples can be tested simultaneously under identical conditions. Conventional tensile testing machines were and still are only able to test one (clamped) specimen at a time. BAM researchers registered their functional principle with the patent office as early as 2004. Since then, Berlin based LUM GmbH licensed the principle and has developed a market-ready product.
The result is a time saving of about 85 percent. When the bond fails, the time, current rotational speed and the affected sample location are automatically sent to a computer from the running centrifuge. Specially developed software calculates the critical forces and tensile stresses and presents the results.
At first glance, the new test system looks like a traditional bench-top centrifuge. But inside there is a special rotor which runs at up to 13,000 revolutions per minute developed by LUM GmbH. Using test stamps which are glued or otherwise attached to the test specimen, adhesive bonds, coatings and composites are subjected to tensile forces. As in a carousel, the centrifugal force resulting from the rotary movement is used. Acceleration up to 10,000 g can be achieved, resulting in centrifugal forces of up to 6.5 kilo Newton (kN) acting on the sample. By comparison, normal gravity is 1g.
"Because of the range of test loads from 0.1 N to 6.5 kN, almost any type of test procedure for both short-term and long-term stress-fatigue tests can be programmed", says Prof. Dietmar Lerche, Managing Director LUM GmbH, Berlin, which specialises in analytical centrifuges. BAM’s Division Head Uwe Beck adds: "The fully automated bench-top testing system is of equal interest to both research and development and industrial quality assurance." The diameter of the test surface can be up to 10 millimetres (mm), the maximum sample sizes are currently at 30 mm x 30 mm x 15 mm. Tensile strength can be tested up to 82.5 N/mm².
The causes of accidents can be diverse, whether it is an explosion in a chemical plant or a fire on a dangerous goods freighter. Prevention starts in the laboratory where chemicals are tested for their hazardous properties. Safety experts, haulage contractors or traders must be able to rely ... more
Do you know how many moulds are in a slice of bread? And has it occured to you whether these moulds pose a danger? BAM's experts are carrying out research into this topic and have developed an analytical method to detect the toxic metabolic compounds of moulds. Moulds, and more than 300 sp ... more
LUM GmbH is a leading international provider of innovative measurement technology for dispersion analysis and materials testing. Since the founding of the company by Prof. Dr. Dr. D. Lerche in 1994, LUM is also obliged to science. The company promotes science and technology and contributes ... more
From 22-23 May 2019 LUM GmbH hosts the 9th International Conference Dispersion Analysis & Materials Testing in Berlin, Germany. Since 2014 the Young Scientist Award (YSA) recognizes outstanding scientific work by young researchers in the areas of particle and dispersion characterization and ... more
The 8th International Conference Dispersion Analysis & Materials Testing is hosted by LUM GmbH in Berlin, Germany, from 29-30 January 2018. Here, during this now traditional interdisciplinary event, particle scientists meet product formulators; application engineers meet scholars from extre ... more
Test formulations under original storage & usage temperatures, regardless of whether they are sold in cold, temperate or hot climates more
Adhesive and tensile strength of composite materials, multi-layer films and bonded parts are determined by the LUMiFrac without sample clamping more
4 product properties are at once in less than 20 sec, without chemicals and without sample preparation more
The new generation of the proven stability analyzer LUMiFuge® considerably simplifies quality control in industry by introducing the instability index in the SEPView® 6 software. The LUMiFuge, which uses the measuring principle of analytical centrifugation, is one of the standard devices fo ... more
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