Nghiên cứu sự phát triển của vi khe nứt trong vật liệu đá, bê tông để dự báo thời gian phả hủy

- Tác giả: Nguyễn Văn Mạnh
Cơ quan:
Trường Đại học Mỏ - Địa chất
- Từ khóa: vi khe nứt, đá và bê tông, dự báo tuổi bền
- Ngày đăng: 28-02-2016
- Lĩnh vực: Tuyển và Chế biến Khoáng sản
Tóm tắt:
For many years, mines put forward an increase in the rock and concrete always contain the microstructural like micro-crack, voils etc. These parameters are effected to lifetime of materials. This article presents a computation algorithm to predict the lifetime of brittle materials like rock and concrete which depends on the distribution of micro-crack in the materials. The proposed model is based on subcritical crack growth using the linear elastic fracture mechanical approach. The algorithm considers both tensile and shear fracturing. The proposed mode! was applied to rock samples under uniaxial compressive and tensile loads for prediction of lifetime. The results showed that a significant difference of failure zones under uniaxial compressive and tensile loads.

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