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Fig 1.

Arrangement of AE sensors in the specimen.

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Fig 1 Expand

Fig 2.

Test model and loading system.

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Fig 2 Expand

Fig 3.

Schematic diagram of loading paths.

(a) Load-holding at different levels. (b) Cyclic loading and unloading.

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Fig 3 Expand

Table 1.

Test schemes.

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Table 1 Expand

Fig 4.

Manual tapping test positioning result.

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Fig 4 Expand

Fig 5.

Time series data: AE events.

(a) S1-1. (b) S2-3. (c) S3-2. (d) S4-1.

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Fig 5 Expand

Fig 6.

Spatial evolution characteristics of cumulative AE events.

(a) S1-1. (b) S2-3. (c) S3-2. (d) S4-1.

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Fig 6 Expand

Fig 7.

Temporal changes in the distribution of apparent stress.

(a) S1-1. (b) S2-3. (c) S3-2. (d) S4-1. (e) Legend.

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Fig 7 Expand