Dual/single cantilever geometry

FIGURE 10.11 Diagrammatic representation of the single and dual cantilever geometries. (Adapted from Dynamic Mechanical Analyser 2980 Operator s Manual, TA Instruments, New Castle, DE, 1996.)... 

Figure 5.50. DMA sample geometries for solids and liquids for solids—dual cantilever, tension, single cantilever, three-point bending or flexure, compression for liquids— cone-plate flow, torsional flow the rheometers that measure liquid-state properties also measure the properties of solid samples in torsional shear (courtesy of TA Instruments).

Geometry options single-cantilever bending 1.0-17.5 mm dual-cantilever bending 2.0-35.0mm three-point bending 20.0-45.0mm Tension <10 mm compression unlimited, <10 mm Shear 10-mm-diameter plate TMA-mode measurement range 1000 pm... 

Figure 4.5 Schematic of available sample geometries, (a) Top left - single cantilever bending (b) top right-dual cantilever bending (c) middle left - tension (d) middle right - compression (e) bottom left-three-point bending (f) bottom right - shear. Note that for these definitions the sample length, /, is always taken as the distance between the fixed clamp and the driveshaft clamp.

Different clamping geometries are used to accommodate particular specimens (Figure 8). Single or dual cantilever bending modes are the most common for materials which can be formed into bars. Shear measurements are used for soft, thick samples. Films and fibres are usually mounted in tension with loading arranged so that the sample is... 

Netzsch DMA 242 C The DMA 242 C can determine viscoelastic properties over a wide modulus range with the common types of deformation geometries three-point bending, single- and dual-cantilever bending, compression/pene-tration, shear, and tension. Netzsch also offers a series of special sample holders, such as those designed, for example, for extremely stiff composite materials and metals. A stainless-steel container is available to facilitate measurements with the sample in various media (the immersion test—option). 

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