Brief introduction into some of the changes and updates to both the ISO 6892-1 and ASTM E8/8M tensile testing standards for metals and ambient temperature.
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Monday, December 30, 2013
Metals Tensile Testing Standards: ISO 6892-1, ASTM E8/8M for Strain Control
Brief introduction into some of the changes and updates to both the ISO 6892-1 and ASTM E8/8M tensile testing standards for metals and ambient temperature.
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Instron Year in Review
| We've created a Year in Review to highlight exciting moments of 2013. We want to keep you up to date on all aspects of Instron® – from our community relations to our acquisitions to available webinars, and new products. There was never a dull moment or a period of time when we weren’t aiming to meet the expectations and needs of our customers. Every experience you have with Instron is invaluable to us as a company. Specifically within TechNotes, I work with our application engineers and product managers to bring you the most relevant and industry-specific news that will assist with your testing applications. Instron professionals are some of the best in the industry and hold seats on many of the ASTM and ISO committees. It’s my goal to share with you their knowledge and experience in order to better support your testing applications. So keep the feedback and questions coming! I welcome any chance I have to speak with you on ways to better communicate just exactly what you’d like to hear. Thank you for your continued support as we move forward into 2014 and I look forward to future communications with you! Best regards, Denise Czerpak TechNotes Editor |
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Thursday, December 26, 2013
Testing Metals to ASTM E8 with an Automatic Contacting Extensometer
When performing strain measurements, such as the strain corresponding to the yield strength, we typically recommend an automatic extensometer. Using an automatic extensometer, such as the AutoX750, helps reduce operator influence on the test while also ensuring accurate data. You can see this more clearly in the above video. Read more
Thursday, December 12, 2013
Energy-controlled Impulse Testing of Shoes
Shoe and shoe material manufacturers alike must be able to prove that their products will withstand a substantial amount of wear and tear before releasing them to market. Useful in this analysis is the ability to simulate the impact of a runner on the sole of a shoe. During a typical gait cycle, these impacts can be higher than 3kN for an adult runner. In addition to controlling the load with which an impact is generated, researchers may also wish to control the energy which is generated as a result of the impact. A testing machine, which can successfully cater to these requirements, must be able to create and maintain a repeatable impact of a certain energy over a prolonged number of cycles.
Custom waveforms were created to replicate the impact of actual gait cycles. WaveMatrix™ software allows users to create and import their own custom waveform in the form of a CSV file, achievable in Microsoft® Excel. Through this custom waveform tab, customers also have the ability to specify a very precise impact duration. The up-to-5kHz acquisition rate of the 8800 Controller enables the waveform to be precisely controlled in the magnitude of milliseconds. As materials testing machines usually have two main controllable transducers, Instron established a method for achieving the given energy requirement for each impulse. The Advanced Amplitude Control is a feature of WaveMatrix that is key to conducting energy-controlled impulses, using a combination of controller gains to make sure that the energy requirement is met for each iteration of the impulse. The combination of this feature, in conjunction with the Calculations Module, allows the ElectroPuls™ to test footwear based on constant load, energy or any other requirement included in the calculations portion of WaveMatrix. Read more
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