Mechanical property experiment method of material for electromagnetic forming
A technology of electromagnetic forming and experimental method, applied in the direction of testing the ductility of materials, analyzing materials, testing the strength of materials by applying a stable shear force, etc., which can solve problems such as stress mismatch and indeterminate friction force.
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Embodiment 1
[0121] Embodiment 1: Direct detection method of electromagnetic expansion ring based on standard shape ring
[0122] figure 1 Shown is the schematic diagram of the standard-shaped circular ring of the present invention and key dimensions, and the recommended standards are shown in Table 1. where δ is defined as the radial thickness of the ring, b is defined as the axial width of the ring, Defined as the inner diameter of the ring, m is defined as the gauge length (arc length) of the ring, t is defined as the axial width of the test work area, L is defined as the occupied length (arc length) of the test work area, R is defined as the test work The radius of the transition arc between the zone and the original zone. The dimensional tolerance t can be required to be IT6 level, the rest of the dimensional tolerances can be required to be IT7 level, and the roundness tolerance value can be 1mm.
[0123] Table 1 Key parameters of standard shape rings
[0124]
[0125] The de...
Embodiment 2
[0138] Example 2: Indirect detection method of electromagnetic expansion ring based on standard shape ring
[0139] This embodiment provides another experimental application method of electromagnetic bulging of a standard-shaped circular sample as a typical example. The core of this method is bulging without breaking. Similar specimens were obtained by hydraulic bulging under the same stress conditions, Figure 4a Shown is the force schematic diagram of the standard shape ring under the condition of electromagnetic bulging and hydraulic bulging. The force direction of each micro-element of the standard-shaped ring 3 is radially outward, and the influence of friction force is negligible. Through the comparison of the uniaxial tensile mechanical test results of the two experimental results, the required conclusions can be drawn indirectly. The specific steps are as follows:
[0140] (1) Take two standard samples with the same geometric shape on the same cylinder for later use;...
Embodiment 3
[0159] Example 3: Impact toughness detection method based on impact toughness adaptability ring
[0160] This embodiment provides an experimental method for testing the impact toughness of materials as a typical example. The above-mentioned standard shape ring 3 sample is replaced by an impact toughness adaptability ring, and the electromagnetic forming experiment is carried out. The high-energy electromagnetic force breaks the impact toughness adaptability ring under the impact load, and compares the impact toughness of materials according to the energy method or voltage method. The specific steps are:
[0161] (1) Prepare the standard sample, refer to the shape of the sample in "Material Mechanical Properties" (edited by Shi Haifang), the specific shape parameters of the sample are shown in Table 2 below; the material selection is consistent with the material to be tested, according to Figure 6a to Figure 6d The parameters shown in Table 2 were compared and wire-cut proces...
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