Tensile and Compression Testing

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Tensile and Compression testing is the generic name for many types of tests such as pull test, tension test, load resistance test, and many more. This assessment usually occusr during the design verification testing stage so device manufacturers can determine if the design can withstand mechanical forces. The forces applied can be axial, radial, push, pull, torque, bend or a combination of these and others.

The stress on the device can help determine poor workmanship or faulty design. In the case of qualification testing, one may subject their product to a series of tests starting with tensile and compression testing, and subsequently temperature testing, thermal shock testing, or altitude testing. This may show more evidence of damage caused by tensile and compression.

Tensile testing laboratories will have a method of clamping on the device under test. There will also be equipment used to apply the force, which will differ depending on the specific test conducted. It’s also typical to measure conditions such as performance or the applied force vs time chart.

Along with hardness, weight or dimension, tensile and compression testing is common for analyzing material properties. Components used in products should also be subjected to testing. For example, termini and cables are pushed and pulled to determine the force of the insertion and removal point, respectively.

One example of compression testing is from TIA-EIA-455-41A (also know as FOTP-41). This telecom standard cover loading resistance of fiber optic cables and its intent is to determine if the product can withstand and/or recover from compressive force. An example of a military test method standard is from MIL-STD-883 Method 2004.6 which tests lead integrity in microcircuits. There are six different conditions from which to test leads ranging from straight tensile loading to torque stresses.

Experior is an ISO accredited lab with expertise in conducting tensile strength and elongation testing to determine material properties. This can be performed either as stand-alone tests or in conjunction with climatic exposures to determine the material degradation. We are a short drive from Los Angeles and Santa Barbara counties.

Our laboratory covers a wide range of capabilities including ASTM D 638 for tensile properties of plastics and FED-STD-228 (method 3021 and 3031) for jacket material tensile strength and elongation. All test results (force/displacement/time, etc) are read electronically via digital interface and can be provided in raw electronic format for further processing.

For tensile and compression testing, our in-house capacity is up to 5,000 lbf (22.2kN) with about 42 in (107 cm) vertical clearance. The cross head speed ranges from 0.002 to 20.00 in/min.

For tensile elongation testing, our in-house capabilities for testing of cables and fibers range from low loads to 2,500 pounds and specimen lengths of up to 150 meter. Experior Labs is specifically accredited for these tests to IEC test methods and can also perform tensile elongation testing to various other industry standards.

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