Variation of Poisson’s ratio of hard rocks during compression and an innovative determination method based on axial loading-unloading test

• Autorzy: Yang Jianan , Fan Pengxian , Gao Hui , Dong Lu

Identyfikatory

DOI

10.1007/s11600-024-01379-3

• Języki publikacji: EN

Abstrakty

EN

The Poisson’s ratio of hard rock exhibits a marked stress dependence, which is contrary to its mechanical definition as an elastic constant. Thus, it is of great importance to determine the Poisson’s ratio through a reasonable method. To investigate the Poisson effect of multiple types of hard rocks (sandstone, basalt, granite, and marble), the uniaxial loading-unloading tests are carried out. The test results indicate that whether the tangent Poisson’s ratio or the average Poisson’s ratio, all gradually increases with the stress level. And the stress dependence of the average Poisson’s ratio under the unloading path is reduced, which is significant in the low and medium stress intervals. Appropriately increasing the number of loading-unloading cycles can also improve the stability of the average Poisson’s ratio to some extent. Based on this, a new method for testing the aver- age Poisson’s ratio is proposed, which can effectively exclude the effect of irreversible displacement of rocks and improve the stability of the average Poisson’s ratio. The test procedure is simple and has good application prospects.

Słowa kluczowe

EN

Poisson’s ratio; stress dependence; variable amplitude loading-unloading; novel testing method

PL

współczynnik Poissona; zależność od naprężeń; obciążenie-odciążenie o zmiennej amplitudzie; nowa metoda testowania

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2025
• Tom: Vol. 73, no. 1
• Strony: 1--10
• Opis fizyczny: Bibliogr. 35 poz.

Twórcy

autor

Yang Jianan

• State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

autor

Fan Pengxian

• State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

autor

Gao Hui

• State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

autor

Dong Lu

• State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).