Short Beam Shear Testing

Short Beam Shear Testing determines the shear strength of materials. A small beam-shaped sample is cut and subjected to a three-point bending load until it fails. The maximum load is recorded, and the shear strength is calculated using the dimensions of the sample and the maximum load.... Read More

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    Short Beam Shear Testing

    Short Beam Shear Testing is widely used in the aerospace and automotive industries to evaluate the shear strength of composite materials. It can also be used to test the shear strength of metals, plastics, and ceramics. The test method is specified in several international standards, including ASTM D2344 and ISO 14130.

    Short Beam Shear Testing is performed using a testing machine that applies a three-point bending load to a beam-shaped sample of the material being tested. Here are the steps involved in performing the test:

    1. Sample Preparation: A small beam-shaped sample of the material is prepared using a saw or cutting machine. The sample should have a specific length, width, and thickness as specified in the relevant standard.
    1. Loading Configuration: The sample is placed on the testing machine, and two loading points are placed on the upper surface of the sample, equidistant from the centerline. The loading points should have a specified radius as specified in the relevant standard.
    1. Load Application: The testing machine applies a force at a constant rate on the center of the sample using a loading point, which causes the sample to bend. The other two loading points support the sample and prevent it from rotating.
    1. Failure Criteria: The test continues until the sample fails, which occurs when a crack propagates across the width of the sample or the sample breaks in half. The maximum force required to cause the failure of the sample is recorded.
    1. Calculation of Shear Strength: The shear strength of the material is calculated using the maximum force and the dimensions of the sample, as specified in the relevant standard.

    Video 01: ASTM D2344 Short-Beam Strength Bend Fixture

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