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- W2024596254 abstract "To verify experimentally the result of a three dimensional finite element analysis of the stress distribution on the tip of a drag bit used for hole drilling in stone-like materials, a series of tests were undertaken. The tests modelled the process of underground bolthole drilling and involved 12 drag bits. The operating parameters and the specific energy were generated as the outcome of the tests with the aid of an acquisition system connected to the drilling operation unit. The experimental results are seen to be in general agreement with the outcome of the finite element analysis. All new tested bits were more or less prone to major chipping at the top points of the cutting tips. There were two kinds of bit failure patterns in general for the tested bits, namely, early premature failure and gradual wearing-out failure. The main parameter of a drag bit, rake angle, demonstrates a strong influence on the performance of the bit. Positive rake bits showed a greater tendency to follow the early premature failure pattern than the negative bits tested. Accordingly, drag bits with different specifications can be catalogued for different usages." @default.
- W2024596254 created "2016-06-24" @default.
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- W2024596254 date "1995-03-01" @default.
- W2024596254 modified "2023-09-26" @default.
- W2024596254 title "EXPERIMENTAL STUDY OF FAILURE PATTERNS OF A DRAG BIT" @default.
- W2024596254 doi "https://doi.org/10.1142/s0950609895000047" @default.
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