Test Method Summary
Four-point flexure testing of fiber-reinforced composites per ASTM D6272 is done to determine the relevant property data for material screening or quality control.
The flexure test is performed by placing the rectangular specimen symmetrically on the support fixture that is mounted either to a servohydraulic or an electromechanical testing machine. The load is applied to the specimen equally on both loading members for four-point testing until rupture occurs in the outer fibers of the specimen or it reaches 5% fiber strain. The specimen deflection should be measured at the common center of the loading span with a deflection measuring device. Properties that are measured include flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship. This standard addresses unreinforced and reinforced plastics, including high modulus composites and electrical insulating materials.
Solutions for ASTM D6272 typically include these types of components:
Load Frame Options
The MTS Landmark® servohydraulic test systems and MTS Criterion® electromechanical test systems are ideal for performing accurate and repeatable monotonic testing of unreinforced and reinforced plastics and electrical insulating materials per ASTM D6272.
The innovative frame design of the MTS Landmark system exhibits superior stiffness and alignment capabilities. The test system integrates the latest servohydraulic technology, including precision-machined columns for consistently tight alignment; fatigue-rated MTS actuators with low friction bearings for long service life, and smooth-ramping hydraulic service manifold for bumpless starts. With the addition of an energy-efficient MTS SilentFlo™ hydraulic power unit, the MTS Landmark system can provide optimum performance and efficiency.
The MTS Criterion test system features high-resolution MTS digital controls, linear motion guides for superior alignment, high-speed, low vibration MTS electromechanical drives, optional dual zone test space for maximizing efficiency and anti-rotation grip/fixture mounting to minimize fixture misalignment.
For other options related to this standard, please download the application test method tech note on this page.