Detection method for identifying material static mechanical property parameters in different areas of solder joints
A technology of static mechanics and detection methods, applied in the direction of testing material hardness, etc., can solve problems such as not found, and achieve the effect of overcoming technical bottlenecks, strong engineering use value, and high practical value
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[0029] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments of the specification.
[0030] Since the constitutive relationship of most engineering polycrystalline metal materials conforms to the power exponential relationship, that is, the hardening curve approximates a parabolic shape. Similarly, for engineering structures such as solder joints formed by a sharp annealing process of cubic lattice metals (steel plates and aluminum alloys, etc.), they also have a parabolic tensile change curve in the plastic deformation stage, so the calculations used in the embodiment of the present invention The material elastoplastic constitutive model is represented by the Hollomon power exponential hardening equation, as shown in formula (1):
[0031] σ = K ϵ n = σ y ϵ y n ( ϵ y + ϵ p ) n = σ y ( 1 + ϵ p ϵ y ) n = σ y ( 1 ...
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