Tensile test apparatus

Figure 2. Closeup view of tensile test apparatus showing (A) Robotic arm with special fingers...

Figure 8.3 Schematic diagram of a tensile testing apparatus...

The tensile strength of compacts [30] also provides useful information. Excellent specimens of square compacts are necessary to conduct the tensile testing. For this reason, a split die [31 ] (Fig. 2) is used to make compacts that are not flawed. The split die permits triaxial decompression, which relieves the stresses in the compact more uniformly in three dimensions and minimizes cracking. These specimens are then compressed with platens 0.4 times the width of the square compacts in the tensile testing apparatus. (Fig. 3). Occasionally nylon platens and side supports are used to reduce the tendency to fail in shear rather than tension. The force necessary to cause tensile failure (tensile forces are a maximum... 

Fig. 3 Schematic diagram of the tensile testing apparatus, which allows for the determination of the tensile strength of compacts of materials. (Adapted from Ref. 31 with permission of the publisher.)...

D 2370-68 Measuring elongation and tensile strength of fiee films of paint, varnish, lacquer, and related products with tensile testing apparatus... 

Figure 49. Schematic representation of the tensile test apparatus developed by Schubert.(Explanations, see text.) (negative) capillary pressure in the...

EVALUATION OF LARGE, MULTIFILAMENT NbaSn CONDUCTORS WITH A NEW 12-TESLA TENSILE TEST APPARATUS ... 

An overall view of the basic tensile-test apparatus is shown in Fig. 1. To eliminate any interaction between the 12-T magnet and the surrounding room-temperature structure, the entire load frame of the tester is fabricated from nonmagnetic stainless steel. The crosshead, shown in the fully raised position in Fig. 1, is supported by two 5.3-m-long, 100-mm-diameter columns. It is raised and lowered by two hydraulic pistons and can be hydraulically clamped to the columns at any position. The column height was made sufficient to allow the cryogenic structure to be raised above the cryostat, the cryostat to be removed, and the structure then lowered back down for the sample to be changed. 

Evaluation of Large, Multifilament NbaSn Conductors with a Tensile Test Apparatus 319... 

Figure 1. a) Four point bending apparatus with variable support spans b) application of adhesive mortars to stone surfaces c) direct tensile test apparatus for stone mortar specimens. 

Testing of the samples may be performed in any tensile testing apparatus. An inch at each end of the sample should be placed in the grips of the machine. Loads are applied at 1200-1400 lb per square inch of the overlap area per minute until failure. A corresponding crosshead speed of 0.05 inch/min may also be used to load the sample. The average shear stress in Ib/inch, the type of failure (i.e., cohesive or adhesive), and characteristics of the sample (i.e., adhesive, metal, sample dimensions and bonding conditions) should be recorded. The majority of stress analyses discussed in Section III use the single-lap specimen. 

A tensile-testing apparatus is to be constructed that must withstand a maximum load of 220,000 N (50,000 Ibj). The design calls for two cylindrical support posts, each of which is to support half of the maximmn load. Furthermore, plain-carbon (1045) steel ground and polished shafting rounds are to be used the minimum yield and tensile strengths of this alloy are 310 MPa (45,000 psi) and 565 MPa (82,000 psi), respectively. Specify a suitable diameter for these support posts. 

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