| Abstract [eng] |
Since the patent of the strain gauge design, this invention started to shape the world we knew before and increased the availability of the strain measurement in different applications. Having this in mind we various application of the strain gauge were found in industries. Nowadays in engineering strain measurement is important field to study. In this paper the idea of the embedded strain gauges are analysed and discussed, as far as industry sees the need of it with upcoming additive manufacturing to all industries, and applications from the rapid prototyping till the aerospace industries. In order to get constant data on structure health and resistance, the strain gauges with data acquisition system can be used. This assures the real time and constant flow of data to keep the structure in safe mode. In order to get the data, the strain gauges must be installed, the installation usually takes time and costs, and also in some cases, when it comes to aggressive environments the upkeep and supervision is complicated. In such cases the embedded sensors including strain gauges would be helpful. In this research paper there is an overview of different strain measurement methods is done and based on all observations, decision was made to proceed with integration of sophisticated strain gauge with ability to withstand elevated temperatures. The temperature resistance is needed, because during 3D printing, temperature reaches more than 200° Celsius. Strain gauges were prepared and embedded in the specimens produced using the PLA as main structure material. After the production and validation of resistance level on each of strain gauge, the data acquisition system was built on the base of Arduino minicomputer to represent and to log the test results and data. For the tests there were two direction chosen, one part of the tests were done using special test bench built and second part was the validation of strain measurement on the test machine. |
