EXTENSOMETERS
2.4
The precise measurement or control of specimen deformation is a fundamental requirement in many materials tests. The use of crosshead or actuator movement to derive specimen deformation is often employed, but accuracy is limited by external influences such as system compliance and specimen deformation outside the nominal gauge length (in the tab ends for example). Extensometry provides a direct and accurate method for measuring and controlling specimen deformation by monitoring strain over a precisely defined gauge length. The Instron extensometry range includes many different types of extensometers to suit various specimens and applications. Each one is designed to provide the best possible accuracy. Instron has designed many custom extensometers and will discuss your extensometry requirements should you be unable to find a suitable device in the following pages. ÂŽ
Automatic Extensometers
80
Biaxial Automatic Extensometers
81
Averaging Axial Clip-on Extensometers
82-83
Dynamic Axial Clip-On Extensometer
84-85
Static Axial Clip-On Extensometers
86-88
LVDT Non-Separable Axial Clip-On Extensometers
89-91
Biaxial Clip-On Extensometers
92-93
Circumferential Extensometers
94
Connecting Cables for Extensometers 95 Crack Opening Displacement (COD) Gauges
96
Deflectometers
97-98
Deflectometer Accessories
99
High-Temperature Extensometers
100-105
LVDT and SLVC Units
106
Long-Travel Extensometers
107
Non-Contacting Video Extensometers 108-109 Digital Image Correlation
110-111
Knife Edges, Clips and Parts for Extensometers
112-113
Transverse Clip-On Extensometers
114