Instron compression test

Table 5 shows the regression equations for the absorption in the GATS unit, and for retention In the Instron compression test in which a uniform amount, 15 g/g, of saline was applied to the specimens. The retention data are considered to be more meaningful because they are based on a fixed amount of saline being added to the system, which is similar to the way diapers are used. 

FIGURE 9.16 Resilience values for chlorobutyl rubber (CIIR), butadiene rubber (BR), unfilled natural rubber (NR), filled natural rubber (SRB), and polyurethane (PU) samples tested using a Shore rebound resibometer, an Instron compression tester and a scanning probe microscope (SPM). (From Huson, M.G. and Maxweb, J.M.,... 

Texture measurements Texture of canned carrots was measured using Instron Universal Testing Machine (Model 1011) fitted with Kramer shear cell. Thirty grams of drained carrot cubes were evenly placed in the Kramer shear cell and were compressed, sheared and extruded using a crosshead speed of 100 mm/min. Each measurement was repeated 10 times and the mean was used to express the firmness of carrot cubes in Newton(N). 

Foamed blends of ethylene-styrene interpolymer and LDPE were subjected to a range of mechanical tests, including compressive impact testing, Instron compression and Poisson s ratio measurements, compressive creep measurements and compression set and recovery measurements. The data obtained were compared with those for EVA and the suitability of these foamed blends as replacements for EVA in the manufacture of soccer shin guards and midsoles for sports shoes was evaluated. 20 refs. 

Texture has a number of component attributes, and some of them can be assessed by mechanical means. The texture or firmness of cooked potatoes is evaluated by subjecting each sample to a compression test using a universal testing machine equipped with a load cell. Cooked potato cylinders are compressed in a single-cycle compression-decompression test. Uniaxial compression is measured with an Instron machine with a lOON load cell. Measurements are performed on hot potato cylinders (depth 12 mm, height 10 mm) from 15 potatoes immediately after cooking, at a deformation rate of 20 mm/min. Stress and strain at fracture are calculated by the Instron series IX version 7.40 software and means of 15 repetitions are calculated. 

The mechanical properties (compression strength and % compression) are determined by Instron Universal Testing Machine using a pellet of 20mm x 20mm pressed at a pressure of 1000kgcnf2 similar to the method used for plastics [68]. 

Set an Instron Universal Testing Machine to compress the specimen twice, compressing each time to 50% of its original height. 

The polymers used and some of their physical properties are listed in Table I. Polymers were mixed and blended on a two-roll mill at 450 K. Samples were compression molded at 450 K for 7 min and cooled in the press with tap water for 5 min. ASTM D412 6.35-mm (Va in.) dumbbells were cut parallel to the mill grain from sheets having 1.9-mm (75 mils) thickness. Instron tensile tests were carried out at least 48 hr after molding. Pull rate was 50.8 cm/min (20 in./min). 

In order to check experimentally the size criterion given in Eq. (1), we analysed the evolution of the yield stress Oy with strain rate for both materials. Compression tests were carried out with cylinders of 10 mm height and 8 mm diameter. An Instron tensile/compression test machine was used with prescribed clamp speeds of 6.10 - 60 mm/min., resulting in initial strain rates of lO Vs lO Vs. The resulting yield stress varied from 60 to 130 MPa for PMMA and 50 to 65 MPa for PC. 

The compressive stress-strain measurements are performed in an Instron Universal Test Machine. Pad specimens (Figure 1) are loaded to the bottomed deflection (Figure 2) at 1.1 in. and unloaded without pause. A cross-head rate of 2.0 in./min which is sufficiently slow as to give essentially a static loading condition is employed. Compressive stress data are reported for deflections of 0.2, 0.4 and 0.6 in. 

Instron. The Instron Universal Testing Machine can be used In compression and tension experiments where the force on a load cell Is measured while moving the cross head a given distance or time. 

Compression tests were carried out using an Instron-type testing machine at a strain rate of 1 x 10 s . The measmements were performed at 1,123 K (BagGaigGeao) and at 973 K (SrgGaieGeao) under vacuum on samples with roughly 2x2x5 mm size. The single crystalline specimens were oriented in a manner that the [110] axis was parallel to the compression axis [18]. 

Compressive testing is similar to tensile testing except the strain is applied in the opposite direction. This is also done on an Instron Universal Materials Testing Machine. From knowledge of the specimen dimensions, the load and deflection data can be translated into a stress—strain curve. A variety of compressive properties can be extracted from... 

After irradiation at about 5 K, the capsule was transferred into the transporting container without warm-up. Specimens were taken from the capsule without warm-up in a cryostat and then transferred into a liquid nitrogen bath. Tensile and compression tests were carried out in this liquid nitrogen bath using an Instron type testing machine. The crosshead speed in the tensile test was 0.5 mm/min for Kapton and Nomex and 0.2 mm/min for other tensile specimens in the compression test it was 0.5 mm/min. 

Compression tests are carried out as per ASTM Cl65 and ASTM D1621 using the Instron 5569 Universal Testing Machine as shown in Fig. 5.3. Each GSA and GSA-SDS sample was cut into a square specimen of x y dimensions of 17.5 2.5 width 27.5 1.5 mm height (in z-direction) using razor blades. The blocks were compression tested in the z-direction at three strain rates, viz, 0.8/min, 1.2/min at the nominal strain up to 44.4 %, and at 1.0/min. Each specimen was loaded in compression using 500 N 4 % load cell with the initial load of 25 % of the nominal strain for 1 min and, thereafter was unloaded. The compressive modulus for each specimen is calculated with the in-built Instron Bluehill software. 

Hulled, brown rice grains were cut at the two ends leaving samples that had approximately the shape of cylinders. Diametral-compression tests were carried out with an Instron type of machine, applying cross-head speeds of 0.1 and 0.01 mmmin , at 20°C, with controlled RH. In these conditions, it has been checked that the failure took place along the diametral plane, dividing the grain into two equal half cylinders, which indicates that the fracture was only caused by a tensile stress (Fig. 2.15b). 

Dynamic-impact force pulses produced with restrained pulse pressures and a range of frequencies can be used to investigate possible power outputs (Zeng et al., 2013). Soin et al. (2014) designed an experiment where they used an Instron system compression test by attaching a compression plate to the load cell. The impact pressure applied was in the range of 0.02-0.10 MPa, which generated an output power density of 1.1-5.1 pWcm 2. 

Compressive testing was performed on quartered cylindrical samples with nominal size of 1.125 in diameter and 0.350 thick. All samples tested were matured under ambient conditions for 12-24 hours prior to freeze drying. An Instron compressive tester with lOOOlb load cell was used, with a strain rate of 0.02 in/min. The average results over 10 samples are presented below in Table 3. 

Mechanical properties of the composites were determined by uniaxial compression and three point bending tests. The lengths of the composite samples were 14 mm for the compressive tests, while they were 30 mm for the bending tests. Both tests were conducted on an Instron 1185 Universal testing machine with a crosshead speed of 0.5 mm/min at room temperature. 

---