Test specimen for tensile testing

The shoulders of the test specimen can be manufactured in various ways to mate to various grips in the testing machine (see the image below). Philadelphia, PA (USA) performs the tensile test in . Test Specimens : Laboratory Testing Inc. Tensile specimens and test machines.

Stress-strain curves, including discussions of elastic versus plastic deformation, yield.

For most tensile testing of materials, you will notice that in the initial portion of the test , the relationship between the applied force, or loa and the elongation the specimen exhibits is linear.

The smallest sub-size round specimens are 2.

Other, smaller, specimen sizes are possible, however there are several issues to consider. A test sample is loaded in tension when it experiences opposing forces acting upon opposite faces both located on the same axis that attempt to pull the specimen apart. Impact testing machines are to be calibrated in accordance with ISO 148-or other recognised standard. The accuracy of tensile test machines is to be within ± one per cent.

These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area. The gauge lengths for most round specimens are required to be 4D for Eand 5D . It applies to tensile testing of vulcanized thermal set rubber materials and thermoplastic elastomers. One confusing issue in planning this test is . An extensometer measures yield strength.

So, standards have been developed to specify the shape of the specimen to ensure the break will occur in the gage length (inches are frequently used) by reducing the cross sectional area or diameter of the specimen throughout the gage . An electro-mechanical or hydraulic universal testing machine equipped with the appropriate specimen grips, an extensometer and software capable of strain rate control and recording stress – strain data is necessary to conduct this test. If you need to conduct tensile tests according to ASTM E please read . How do different specimen geometries affect tensile test ? The paper also discusses various challenges in fabrication of miniature tensile test specimens , testing methodologies and acceptance of the test . A comparison with the test from conventional size specimen has been done for establishing the suitability of the miniature test specimen. Remember that you need to work out how much your sample is going to shrink during sintering, and design your compaction tooling accordingly. The link to the standard is attached.

Specialized testing and services include consulting, failure analysis, reverse engineering service, fastener testing, scanning electron microscopy, welder qualification, materials and process problem solving,and miscellaneous tests on non-metallic materials.