The Instrumented Charpy Impact Tester is an important device in the field of mechanical properties testing of materials. It evaluates the toughness and fracture resistance of materials under high-speed loads through dynamic impact tests. Compared to traditional pendulum impact testers, its core technology lies in the digital recording and analysis of the impact process achieved through high-precision sensors and signal acquisition systems, providing more comprehensive data support for material research, quality control, and failure analysis.

1. Technical Principles

The working principle of the instrumented pendulum impact tester is based on the law of conservation of energy, but its core breakthrough lies in the dynamic monitoring of the impact process. When the pendulum freely falls from a preset height, its potential energy is converted into kinetic energy, which acts on the surface of the specimen through the striker. Traditional equipment calculates the absorbed energy solely based on the rebound height of the pendulum, while instrumented devices achieve multi-dimensional data acquisition through the following technologies:

Sensor Integration: Force sensors, displacement sensors, and accelerometers are embedded in the striker or support to record force-time and displacement-time curves in real-time during the impact process.

Signal Processing: Dynamic signals are captured using high-speed data acquisition cards (sampling rates can exceed 1MHz), and noise interference is eliminated using filtering algorithms.

Parameter Calculation: Key mechanical indicators are derived from the raw data, including:

1), Impact Energy: The total energy absorbed by the specimen before fracture (initial potential energy minus residual potential energy);

2), Maximum Impact Force: The peak force value that occurs during the impact process;

3), Force-Displacement Curve: A complete mechanical response that reflects the material's deformation behavior;

4), Energy Distribution: Analysis of components such as plastic deformation energy and crack propagation energy.

2. Typical application field: 

1), Material research and development

Ductile-brittle transition temperature (DBT) determination: Through a series of temperature impact tests, the critical point at which the material transitions from ductile fracture to brittle fracture is determined, providing a basis for material selection for cryogenic containers.

Alloy composition optimization: Compare the impact absorption energy of steel materials under different heat treatment processes, and select the optimal composition ratio.

2), Quality control

Automotive component verification: Test the impact resistance of safety components such as bumper beams and B-pillars to ensure compliance with collision safety standards.

Weld joint evaluation: Through Charpy V-notch specimen testing, verify whether the impact toughness of the weld zone meets the standard.

3), Failure analysis

Fracture mode identification: Determine the fracture type (such as cleavage fracture, ductile fracture) based on the force-displacement curve, and assist in accident cause analysis.

Service life prediction: Evaluate the remaining life of equipment such as pressure vessels and pipelines through cumulative impact damage models.

3,  Application examples in the industrial field

Automotive industry: Automaker used an instrumented impact tester to test aluminum alloy body panels and found that their impact absorption energy at -40℃ was 35% higher than that of traditional steel parts, verifying the feasibility of lightweight design.

Nuclear power engineering: After neutron irradiation of safety-end shielding materials, impact testing reveals a tendency for material embrittlement, providing key data for reactor life extension assessment.

Aerospace: During the impact test of titanium alloy fasteners in the liquid nitrogen temperature range, the instrumented system captured real-time signals of crack initiation and propagation, providing support for damage tolerance design. 

Beijing United Test Co.,Ltd. export@unitedtest.com offer the testing equipment of Instrumented Pendulum Charpy Impact Test. 

Contact us now : export@unitedtest.com, unitedtest@hotmail.com