本文選題：應(yīng)力角效應(yīng)　切入點(diǎn)：拉剪區(qū)　出處：《巖土力學(xué)》2017年02期 　論文類型：期刊論文

【摘要】：為模擬巖石在循環(huán)加、卸載作用下的變形特性,結(jié)合Drucker-Prager(簡(jiǎn)稱D-P)屈服準(zhǔn)則與次加載面理論,建立了能考慮巖石材料實(shí)際抗拉強(qiáng)度和應(yīng)力角效應(yīng)的循環(huán)加、卸載模型。首先考慮巖石在三軸壓縮和在三軸拉伸狀態(tài)下不同的強(qiáng)度特性,在傳統(tǒng)的D-P屈服準(zhǔn)則中引入角隅模型,并借鑒殷有泉提出的D-P-Y準(zhǔn)則,形成了修正的D-P屈服準(zhǔn)則;進(jìn)一步結(jié)合修正屈服準(zhǔn)則和次加載面理論,提出了適用于巖石循環(huán)加、卸載的次加載面模型,并通過自編程序,實(shí)現(xiàn)了循環(huán)加、卸載模型的數(shù)值表達(dá)與巖石循環(huán)加、卸載試驗(yàn)數(shù)值仿真。計(jì)算結(jié)果表明,基于修正D-P屈服準(zhǔn)則的次加載面模型能較好地描述巖石的曼辛效應(yīng)和棘輪效應(yīng);通過改變抗拉強(qiáng)度的大小,可以發(fā)現(xiàn)隨著抗拉強(qiáng)度的減小,巖石的變形量相應(yīng)增加,且增加的幅度逐漸提高,說明修正模型可準(zhǔn)確反映抗拉強(qiáng)度對(duì)巖石的循環(huán)加、卸載變形的影響。
[Abstract]:In order to simulate the deformation characteristics of rock under cyclic loading and unloading, combined with Drucker-Pragerian yield criterion and subloading surface theory, a cyclic loading method considering the actual tensile strength and stress angle effect of rock material is established. Unloading model. Firstly, considering the different strength characteristics of rock under triaxial compression and triaxial tension, the corner model is introduced into the traditional D-P yield criterion, and the modified D-P yield criterion is formed by referring to the D-P-Y criterion proposed by Yin Youquan. Furthermore, combined with the modified yield criterion and the theory of subloading surface, a subloading surface model suitable for cyclic loading and unloading of rock is proposed. The numerical expression of cyclic loading and unloading model and cyclic loading of rock are realized by self-programming. Numerical simulation of unloading test. The results show that the subloading surface model based on modified D-P yield criterion can better describe the Mansin effect and ratchet effect of rock, and by changing the magnitude of tensile strength, it can be found that the tensile strength decreases with the decrease of tensile strength. The amount of deformation of rock increases correspondingly and the amplitude of increase increases gradually. It shows that the modified model can accurately reflect the effect of tensile strength on cyclic loading and unloading deformation of rock.
【作者單位】： 中國(guó)科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目(No.2015CB057905) 國(guó)家自然科學(xué)基金項(xiàng)目集成項(xiàng)目(No.91215301);國(guó)家自然科學(xué)基金資助項(xiàng)目(No.11272331)~~
【分類號(hào)】：TU45

【相似文獻(xiàn)】

相關(guān)期刊論文 前4條

1 周維;伍先安;;亞加載面粘彈塑性模型及其對(duì)金屬材料的應(yīng)用[J];科技信息;2009年12期

2 羅愛忠;邵生俊;陳昌祿;方娟;;黃土的修正上下加載面模型研究[J];巖土力學(xué);2013年S2期

3 金永杰;逐段線性加載面等向強(qiáng)化時(shí)角點(diǎn)處塑性應(yīng)力應(yīng)變關(guān)系[J];福州大學(xué)學(xué)報(bào)(自然科學(xué)版);1994年04期

4 ;[J];;年期

相關(guān)碩士學(xué)位論文 前3條

1 周維;亞加載面粘彈塑性力學(xué)及其對(duì)金屬材料的應(yīng)用[D];北京化工大學(xué);2009年

2 薄蕾;非連續(xù)加載面內(nèi)彎曲實(shí)驗(yàn)與理論研究[D];西安理工大學(xué);2008年

3 伍大鵬;混凝土在循環(huán)荷載作用下的次加載面模型[D];北京交通大學(xué);2012年

，

本文編號(hào)：1586528