Unveiling the Strength: The Mechanical Performance Testing of Cables and Wires
Cables and wires are primarily used for the transmission of electricity and electrical signals. Due to considerations such as buried in civil construction and engineering installation, it is essential for the rubber materials in cables and wires, especially the protective insulation and shielding layers, to possess sufficient tensile strength and elongation properties. Therefore, the mechanical performance testing of cables and wires, including tensile strength, elongation, elasticity, strength, and toughness, becomes particularly crucial.
Conventional mechanical performance testing of cables and wires mainly includes several parameters: tensile strength, elongation, elasticity, strength, and toughness. These indicators directly assess the quality aspects such as resistance to aging and dielectric properties of cables and wires.
The mechanical testing of cables and the measurement of various properties are conducted using universeal testing machines
Tensile Strength: Cable and wire samples are fixed to a tensile testing machine and subjected to gradual pulling force until fracture occurs.
Testing Machine: Universal Testing Machine with tensile fixture
Elongation: The percentage increase in length during the tensile process is measured. It reflects the extensibility and plasticity of cables and wires.
Testing Machine: Universal Testing Machine with tensile fixture
Elastic Modulus: It quantifies the elastic deformation of cables and wires under stress and strain conditions. The unit is typically N/mm².
Testing Machine: Universal Testing Machine with tensile fixture
Flexural Strength: The ability of cables and wires to resist fracture under bending is assessed. Samples are fixed to a bending testing machine and subjected to bending force until fracture occurs.
Testing Machine: Bending Testing Machine.
Toughness: The ability of cables and wires to resist fracture under impact or vibration is evaluated.
Testing Machine: Impact Testing Machine.
