本文選題：巖石力學(xué) + 相似材料　； 參考：《巖土力學(xué)》2017年08期

【摘要】：無法直觀認(rèn)識和還原巖石內(nèi)部結(jié)構(gòu)一直是阻礙巖石力學(xué)試驗研究的關(guān)鍵問題之一。以天然砂巖為研究對象,運用CT掃描和2種不同的3D打印工藝重構(gòu)了與天然砂巖試樣結(jié)構(gòu)相接近的3D打印試樣,并在此基礎(chǔ)上通過單軸壓縮和巴西劈裂試驗對天然砂巖及3D打印試樣進(jìn)行了力學(xué)性能測試,對比了兩者的強(qiáng)度和變形規(guī)律。試驗結(jié)果表明:通過不同3D打印工藝制作的試樣均能夠高度還原天然砂巖試樣的內(nèi)部復(fù)雜結(jié)構(gòu)。其中,采用3DP打印工藝制作的試樣具有與天然砂巖試樣更接近的物理力學(xué)性能,試驗結(jié)果的離散性也相對較小。其研究結(jié)果可為今后巖石力學(xué)研究中材料的替換、室內(nèi)試驗的開展和數(shù)值模擬結(jié)果的印證提供新的研究途徑。
[Abstract]:The inability to directly understand and reduce the internal structure of rock has been one of the key problems hindering the experimental study of rock mechanics.Using CT scanning and two different 3D printing techniques, the 3D printed samples, which are close to the structure of natural sandstone samples, are reconstructed by using CT scanning and two different 3D printing techniques.On this basis, the mechanical properties of natural sandstone and 3D printed samples were tested by uniaxial compression and Brazilian splitting test, and their strength and deformation were compared.The experimental results show that the samples produced by different 3D printing processes can highly reduce the internal complex structure of natural sandstone samples.Among them, the samples made by 3DP printing process have physical and mechanical properties closer to those of natural sandstone samples, and the dispersion of test results is relatively small.The results can provide a new research approach for the replacement of materials, the development of laboratory tests and the verification of numerical simulation results in rock mechanics research in the future.
【作者單位】： 長安大學(xué)建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(No.51009010,No.51379015,No.51579013) 中央高�；究蒲袠I(yè)務(wù)費專項資金(No.310828172001)~~
【分類號】：TU45

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