Special electronic universal testing machine for composite materials | Test scheme of mechanical properties of continuous carbon fiber/epoxy resin at room temperature

Continuous carbon fiber/epoxy resin materials are widely used in the research and development of aviation structural parts, component strength check and material batch quality inspection, and complete quasi-static mechanical data need to be obtained as support during the test. The special electronic universal testing machine for Jinan Liling composite materials can complete a complete set of tests of quasi-static tension, compression, bending and in-plane shear at room temperature, and the scheme is compatible with both domestic national standard and American standard ASTM test specifications.

Equipment characteristics
The fully enclosed safety protection frame equipment is equipped with aluminum transparent safety protection cover and adopts push-pull protection door, which can directly observe the sample state during the test stage; When the high-strength carbon fiber sample breaks and cracks, the protective cover can prevent the debris from splashing, which meets the safety management requirements of universities, aviation research institutes and third-party testing laboratories.
Double-space mainframe structure, convenient tool replacement, and independent test space for the upper and lower parts of the mainframe. The upper space is equipped with hydraulic wedge-shaped self-tightening fixture (commonly known as violent fixture in the industry) to adapt to the tensile test scene; During the loading process, with the increase of load, the jaws can be automatically locked, which reduces the slip risk of the laminated plate sample and helps the sample break in the gauge section. In-plane shear adopts 45 off-axis tensile test method, and the test can be carried out directly with this set of tensile fixture. The compression and bending tools can be quickly replaced in the lower test space, and a single device supports four mechanical test items, thus improving the use efficiency of the device.
Servo measurement and control system, double-standard adaptation equipment adopts servo drive with precision ball screw, which has good stability in force and displacement acquisition. Matching professional material test software can automatically collect load, displacement and strain data according to the national standard GB and American standard ASTM, complete the calculation of strength and elastic modulus, and generate test reports that meet the requirements of specifications. The test data supports storage, export and traceability.
Matching special tooling and corresponding test standards.
Stretching: hydraulic wedge-shaped self-tightening fixture, meeting GB/T 3354-2014 and ASTM D3039/D3039M.
Compression: CLC combined loading compression fixture, adapted to GB/T 5258-2008 and ASTM D6641/D6641M.
Bending: Three-point/four-point bending tooling, which is suitable for GB/T 3356-2014 and ASTM D7264/D7264M.
In-plane shearing: hydraulic wedge self-tightening fixture (45 off-axis stretching method) is reused, which is suitable for GB/T 3355-2014 and ASTM D3518/D3518M.
The uniaxial extensometer can be selected according to the test requirements for the collection of elastic modulus.

List of test items (quasi-static at room temperature)
Tensile properties: tensile strength, tensile elastic modulus
Compressibility: compressive strength, compressive elastic modulus (CLC combined loading scheme)
Bending properties: bending strength, bending elastic modulus.
In-plane shear performance: in-plane shear strength and in-plane shear modulus.
Applicable scenario
Aerospace research institutes, college of materials, spare parts manufacturing enterprises and third-party material testing laboratories can be used for material research and development, incoming inspection, batch verification and material database establishment of continuous carbon fiber epoxy prepreg laminates.

Jinan Liling can provide an integrated solution for the mainframe, a complete set of standard tooling and supporting software, which can be adjusted according to the project requirements. Welcome to consult for detailed technical solutions.