Thermal shock effects on the mechanical behavior of granite exposed to dynamic loading

• Autorzy: Li Xiang , Li Baijin , Li Xibing , Yin Tubing , Wang Yan , Dang Wengang

Identyfikatory

DOI

10.1007/s43452-020-00070-w

• Języki publikacji: EN

Abstrakty

EN

Under certain extreme conditions in rock engineering works, fast change in temperature in the load-bearing rocks can happen. Known as thermal shock (TS), such process involves rapid temperature rise or drop, which causes fracturing in the rock material and thus can pose as a threat to the stability of the rock structures. To investigate the influence of thermal shock caused by fast cooling on the mechanical property of rock, laboratory tests are performed on heated granite which are cooled with different methods, with the highest cooling rate reaching 167.4 °C/min. The dynamic loading tests are performed on the heated granite specimens utilizing the split Hopkinson pressure bar (SHPB) system. The test results show that the dynamic compressive strength drops with the increase in heating level or cooling rate. This pattern is explained by the nuclear magnetic resonance (NMR) test data that the pores inside the heated granite increase both in size and quantity as heating level or cooling rate rises. Damage patterns of the tested granite specimen fragments are analyzed based on the observation with scanning electron microscope (SEM), and the mechanisms of thermal shock in granite are also discussed.

Słowa kluczowe

EN

thermal shock; cooling rate; SHPB; fracture pattern

PL

szok termiczny; szybkość chłodzenia; pęknięcie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 3
• Strony: 30--40
• Opis fizyczny: Bibliogr. 48 poz., fot., rys., wykr.

Twórcy

autor

Li Xiang

• School of Civil Engineering, Sun Yat-sen University, Zhuhai 519082, China
• School of Resources and Safety Engineering, Central South University, Changsha 410083, China

autor

Li Baijin

• School of Resources and Safety Engineering, Central South University, Changsha 410083, China

autor

Li Xibing

• School of Resources and Safety Engineering, Central South University, Changsha 410083, China

autor

Yin Tubing

• School of Resources and Safety Engineering, Central South University, Changsha 410083, China

autor

Wang Yan

• State Key Laboratory of High Performance Complex Manufacturing, School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

autor

Dang Wengang

• School of Civil Engineering, Sun Yat-sen University, Zhuhai 519082, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)