Composite Material Testing Equipment & Systems

Composite Material Testing Solution

To meet the testing requirements of composite materials featuring anisotropy and complex interlayer mechanical properties, SUNS has launched a dedicated testing machine for composite materials.

Centered on multi-dimensional mechanical testing and precise stress control, the machine supports professional test items including tension, compression, flexure, interlaminar shear, peeling, and post-impact residual strength testing of composite materials. It complies with dedicated composite material standards such as GB/T, ISO and ASTM, providing professional testing solutions for R&D and quality control of composite components in aerospace, wind power, rail transit, new energy and other industries.

We offer specialized testing equipment for the complex and anisotropic mechanical behavior of composite materials. The system covers tensile, compression, flexural, interlaminar shear, peel and post-impact residual strength testing, with precise load control for the assessment of various mechanical properties and failure behaviors. Testing can be carried out in accordance with GB/T, ISO, ASTM and other relevant standards for composite materials, and is applied in the fields of composite R&D, component evaluation and quality control in industries such as aerospace, wind power, rail transit, new energy and others.

Material	Typical Tests	Recommended Equipment
Fiber-Reinforced Plastics	Tensile Testing	Electromechanical Universal Testing Machine, UTM4000
Fiber-Reinforced Plastics	Shear Strength Testing	Electromechanical Universal Testing Machine, UTM4000
Coated Fabric for Ventilation Ducts	Tear Strength Testing	Electromechanical Universal Testing Machine, UTM6000
Aluminum Composite Panels	Flexural Strength Testing	Electromechanical Universal Testing Machine, UTM4000
Unidirectional Fiber-Reinforced Plastics	Compression Testing	Electromechanical Universal Testing Machine, UTM5000
Polymer-Matrix Composite Laminates	Compression Testing	Electromechanical Universal Testing Machine, UTM5000
Aluminum Alloy Thermal-Barrier Profiles	Tensile Testing	Electromechanical Universal Testing Machine, UTM4000

Testing Methods/Standards

GB/T 28891, GB/T 3354, GB/T 3355, GB/T 3356, GB/T 30968.1, GB/T 30968.2, GB/T 30968.3, GB/T 30968.4, GB/T 30969, GB/T 30970, GB/T 1446, GB/T 1447, GB/T 1448, GB/T 1449, GB/T 1452, GB/T 1453, GB/T 1454, GB/T 1455, GB/T 1456, GB/T 1457, GB/T 1458, GB/T 3856, GB/T 5258, GB/T 1450.1, GB/T 1450.2, GB/T 3357
HB 6740-93, HB 5485-91, HB 7237-95
ASTM D3039, ASTM D3410, ASTM D6641, ASTM D5467, ASTM D3518, ASTM D4255, ASTM D5379, ASTM D3846, ASTM D7078, ASTM D2344, ASTM D7264, ASTM D790, ASTM D5448, ASTM D5449, ASTM D5450, ASTM E3479, ASTM D5766, ASTM D6484, ASTM D6742, ASTM D7136, ASTM D7137, ASTM D5961, ASTM D7205, ASTM C273, ASTM C297, ASTM C363, ASTM C364, ASTM C365, ASTM C393, ASTM C394, ASTM C480, ASTM D6416, ASTM D6790, ASTM D7249, ASTM D7250

Composite Tensile Testing

Standards: ASTM D3039, ASTM D3518, ISO 527-4, ISO 14129, GB/T 1447, GB/T 1040, GB/T 3354, GB/T 3355, EN 2561
Test Parameters: Maximum Force, Tensile Strength, Elastic Modulus, Poisson’s Ratio
Strain Measurement: Strain Gauge / Clip-On Extensometer / Video Extensometer
4.Hydraulic Grip Options:
1. 100 kN / 250 kN Ambient-Temperature Hydraulic Grips
2. 100 kN / 250 kN Full-Temperature Hydraulic Grips (-70°C to 350°C / -70°C to 550°C)
Jaw Options: Flat Jaws, 0–8 mm / 8–16 mm

Composite Monofilament / Multifilament / Tow / Glass Fiber Tensile Testing

Standards: ISO 11566 (Carbon Fiber Monofilament), GB/T 3362 (Carbon Fiber Multifilament), GB/T 7690.3 (Glass Fiber), FZ/T 50007 (Spandex Filament)
Test Parameters: Tensile Strength, Modulus, Elongation
Deformation Measurement: Contact Extensometer / Video Extensometer
Fixture Options:
1. Pneumatic fixtures are preferred for consistent clamping force and test repeatability.
2. Pneumatic Parallel-Clamping Fixture — Monofilament, Multifilament and Spandex Filament
3. Pneumatic Capstan Grip — Glass Fiber

Tensile Grips

Composite Flexural Testing

Standards: ASTM D790, ASTM D6272, ASTM D7264, ASTM D2344, ISO 14125, ISO 14130, ISO 178
Test Parameters: Flexural Strength, Flexural Modulus
Deformation Measurement: Dial Indicator / Deflectometer

Flexural Test Fixtures

Composite In-Plane Compression Testing

Standards: ASTM D6641, ASTM D695, ASTM D3410, ISO 14126, GB/T 5258, GB/T 3856, EN 2850, SACMA SEM 1R
Test Parameters: Maximum Force, Compressive Strength, Elastic Modulus, Poisson’s Ratio
Deformation Measurement: Strain Gauge / Video Extensometer (Small Field of View, Telecentric Lens, High Precision)

Compression Test Fixtures

Composite Shear Testing

Standards: ASTM D5379, ASTM D7078, ASTM D3518, ISO 14129
Test Parameters: Shear Strength, Elastic Modulus
Strain Measurement: Strain Gauge

Shear Test Fixtures

Sandwich & Honeycomb Composite Testing

Standards: ASTM C363 (Core Tension), ASTM C273 (Shear), ASTM D364 (Edgewise Compression), ASTM C365 (Flatwise Compression), ASTM C297 (Flatwise Tension), ASTM C393 (Core Shear), ASTM D1781 (Climbing Drum Peel), ASTM D3167 (Floating Roller Peel)
Test Parameters: Strength, Modulus
Deformation Measurement: Dial Indicator / Extensometer

Sandwich & Honeycomb Composite Test Fixtures

Composite Fracture Toughness Testing

Standards: ASTM D5528, ASTM D7905, ASTM D6671, GB/T 28891, EN 6033, ISO 15024
Test Methods: Mode I (Bonded Block and Hinge Connection), Mode II, Mixed-Mode
Test Parameters: Load, Crack Length
Crack Length Measurement: Manual Measurement / Non-Contact Visual Measurement System

Fracture Toughness Test Fixtures

Composite Laminate Bearing Testing

Fixtures: Standard Hydraulic Wedge Grips for Tensile Testing / Compression Fixtures Configured According to Applicable Standards
Test Parameters: Compressive Strength, Modulus
Deformation Measurement: Strain Gauge / Extensometer

Bearing Response & Open-Hole Compression Test Fixtures

Composite Compression After Impact (CAI) Testing

Compression After Impact (CAI) testing evaluates the residual compressive strength of composite materials after impact damage. Pre-damaged specimens are subjected to compression using dedicated fixtures to determine the remaining load-bearing capacity of the damaged composite structure.

Standards: ASTM D7136 (Drop-Weight Impact), ASTM D7137 (Compression After Impact), GB/T 21239
Deformation Measurement: Strain Gauge
Fixture: CAI Fixture

Mechanical Testing of Composites at High & Low Temperatures

An environmental chamber provides controlled high- and low-temperature conditions for evaluating the mechanical properties of composite materials. The full-temperature hydraulic wedge grips accommodate other composite testing fixtures directly without requiring grip removal, providing a more efficient setup for different test procedures.