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Parts keep breaking for no apparent reason? — Unravel the truth behind material failure through crack analysis!

Release date： 2025-05-16 00:00

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In material failure analysis, fracture is often a complex process, and finding the "starting point" of fracture - the fracture source area, just as the detective locks the first scene when solving the case. It not only reveals the initial trigger for fracture, but also provides important clues for preventing similar accidents and optimizing product design.

1：The fracturing source zone: Why is the “starting point” of fracture so important?

The break does not happen overnight, but begins to expand gradually from a weak point. The cleft source area is usually the result of a combination of internal defects, external stress concentration, or environmental factors. Accurately locate the source of the separation, can help engineers:

1, the source of retroactive failure: determine whether it is a material problem, process defects or a fracture caused by improper use;

2, improve product design: optimize the structure or material selection for weak links;

3、3, to prevent the recurrence of accidents: through targeted measures to avoid the recurrence of the same kind of fracture.

2："Talk": the typical breakage of the cleft source judgment

According to the characteristic pattern of the break of the polymer material, we can find the location of the cracking source like the interpretation of the password:

glyph

The human character on the break, the direction of its "head" directly points to the crack source. This phenomenon stems from the direction of energy release during the crack expansion process.

parabolic

The vertex of the parabola is the location of the starting source. This type of pattern is often broken when the material is hit by the load.

Direction of the river

The small cracks of the line converge into a "river", and its flow direction points to a larger step or defect.

Point extension

With the starting source as the center, the cracks expand outward in a radial form, similar to the "sun light", and the central point is the source.

In addition, share some of the bubbles or traces of chemical reagent erosion in some of the broken junctions we have encountered before, and see what differences exist with the above-mentioned cracking source break characteristics.

Undrying

Chemical reagent soak crack road 1

Chemical reagent soak cracked road two

The meaning of the source judgment is not only to "find the problem", but also to "solve the problem". It is not only a bridge between failure and engineering practice, but also one of the core capabilities of material engineers.

Note: The above picture is partly derived from external channels, and is only for learning communication and reference use.

Interactive benefits

Analyze the crack source pattern in the picture and explain the basis for judgment.

The answer was published on May 23, 2025.

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