Force-torque sensor systems capable of simultaneously measuring all six spatial degrees of freedom on solid bodies are not very widespread in the medical field, particularly because of the hitherto unacceptably large external dimensions. A sensor based on the strain gauge technique has been developed with a diameter of only 32.5 mm and height of 29 mm. The miniaturised supporting framework for ...

Samples of DuPont 7A and 7C Teflon (PTFE, poly(tetrafluoroethylene)) were tested in compression at strain-rates between 10 and 1 s and temperatures between K198 and 200 8C. Additionally, using a Split-Hopkinson pressure bar, a temperature compression series was undertaken between K100 and 150 8C at a strain rate of 3200 s. To investigate the small-strain response, strain gauges were used to mea...

Our goal was to demonstrate a wireless communications system capable of simultaneous, high speed data communications, particularly adapted for use with conventional foil strain gauges. We have previously described data logging transceiver nodes capable of 2K samples/second/channel data rates. However, only one node may stream data at a time, since all nodes on the network share the communicatio...

Abstract The method of fibre optic strain measurement based on Rayleigh signal analysis enables the detection deformation behaviour laminated glass and modelling its load-bearing characteristics. system is already calibrated for surfaces by studies Chair Building Structure at Universität Siegen. In addition to discretely measuring systems, such as gauges, distributed particularly suitable deter...

BACKGROUND The purpose of this experimental study was to measure stresses both on the pterygoid plates and the skull base following two different pterygomaxillary approaches in Le Fort I osteotomy. MATERIAL AND METHODS The prepared skull models were randomly divided into 2 groups of 7. In the first group (A), the pterygomaxillary area was left intact. In the second group (B), pterygomaxillary...

Miniaturization precision positioning platforms are needed for in situ nanomechanical test applications. This paper proposes a compact precision positioning platform integrating strain gauges and the piezoactuator. Effects of geometric parameters of two parallel plates on Von Mises stress distribution as well as static and dynamic characteristics of the platform were studied by the finite eleme...

and accessory rods at PSO level. Testing evaluated (1) accessory Study Design. In vitro cadaveric biomechanical study. Objective. To assess effects of 4-rod reconstruction, rod material, and anterior column support on motion and surface rod strain in a pedicle subtraction osteotomy model. Summary of Background Data. Pedicle subtraction osteotomy (PSO) can correct significant sagittal deformity ...

Determining the operational performance and health of large-scale assets often require the continuous monitoring of a wide range of parameters, from strain, temperature and pressure to vibration and sound. In many situations, it is highly desirable from cost and system robustness point of view to have a centralized data acquisition and analytics for the entire asset. For such applications, fibe...

Abstract Accurate stress–strain measurements in triaxial tests are critical to compute reliable mechanical parameters. We focus on compliance at the interfaces between specimen and endcaps, test specimens under various conditions using different instrumentation protocols. The tested materials include aluminum, Eagle Ford shale, Berea sandstone, Jubaila carbonate. Results obtained following comm...

Purpose: This study aimed to evaluate Peri-implant strain with locator and bar attachment during dislodging of maxillary implant overdenture Materials methods: Four implants were inserted in completely edentulous acrylic model canine premolar areas. Experimental overdentures 4 metal hooks constructed connected the attachments (group I) or 2). Two gauges bonded at buccal palatal surface each imp...