What is Compression Testing?
Compression testing is a fundamental type of material testing. Compression tests are used to determine the behavior of a material under applied crushing loads. They are typically performed by applying compressive pressure to a test specimen (usually of cuboid or cylindrical geometry) using platens or specialized fixtures on a universal testing machine. During the test, various material properties are calculated and plotted as a stress-strain diagram, which is used to determine qualities such as elastic limit, proportional limit, yield point, yield strength, and, for some materials, compressive strength.
Why Perform A Compression Test?
Compression testing enables manufacturers to evaluate the integrity and safety of materials, components, and products at various stages of the manufacturing process. The potential applications range from testing the strength of a car windshield to testing the endurance of concrete beams used in construction. Materials with high tensile strength often (but not always!) have low compressive strength. Similarly, materials with high compressive strength have low tensile strength. As a result, compression testing is frequently performed on brittle materials such as concrete, metals, plastics, ceramics, composites, and corrugated materials such as cardboard. These materials are frequently used in load-bearing applications where their compressive strength is critical.
Compression tests are frequently performed on finished products, as opposed to tensile tests, which are usually performed to determine the tensile properties of a specific material. Tennis balls, golf balls, water bottles, protective cases, plastic pipes, and furniture are all examples of products that require compressive strength testing. Compression testing can assist engineers in fine-tuning the balance of product strength and material conservation.
Ultimate Compressive Strength
A material’s ultimate compressive strength is the value of compressive stress attained when the material fails completely. Brittle materials are crushed when they reach their ultimate compressive strength, and the load drops dramatically. Higher ductility materials (most plastics) do not rupture, but instead deform until the load is no longer applied to the specimen, but rather between the two compression platens. In these cases, compressive strength can be reported as specific deformations such as 1%, 5%, or 10% of the original height of the test specimen.
Industry-Specific Testing Standards
There are numerous ASTM and ISO standards for compression testing a wide range of materials. The furniture, automotive, and mattress industries, for example, adhere to ASTM D3574, which measures the indentation force deflection of polyurethane foam. This test determines the foam’s initial softness by measuring the force applied when the foam is compressed to 25% of its original thickness. The force when compressed to 65% of its original thickness is then measured to determine how supportive it is. Automotive seating engineers specify the indentation force deflection value of the foam they want in their final product, and the manufacturing location will run the test several times per shift to ensure that each seat manufactured has the same softness and supportiveness.
Tips for Choosing the Best Compression Testing Machine
When it comes to purchasing a compression testing machine, you must follow these amazing tips to help you choose the best compression testing machine. The Falcon Geomatics compression tester will easily meet all of your requirements. Here are some pointers:
Compatibility:
The first and most important consideration is how many samples can be tested with this testing machine. Also, ensure that the sample is of a size that a machine can handle.
Load range:
Another critical consideration is load range. When choosing a box compression tester, keep the maximum and minimum load ranges of the materials in mind. You will be able to accurately place the specimen once you have determined the load range.
Precautions:
You must consult with an expert about the precautions to be taken while performing the test. Also, consider the safety features that a machine can provide.
Strength and durability:
Another consideration is the strength and durability of this testing machine. You must select a machine that is both strong and long-lasting.
These are some important considerations to make when selecting a Comperisson testing machine. To learn more about this Comperisson testing price, including its models, please call us at 97142212333 or email us at sales@falcon-geosystems.com. We will provide you with the necessary information.
