Comptes Rendus Mecanique最新文献_第10页

An empirical statistical constitutive relationship for rock joint shearing considering scale effect 考虑尺度效应的节理剪切经验统计本构关系

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-08-01 DOI: 10.1016/j.crme.2019.08.001

Hang Lin , Shijie Xie , Rui Yong , Yifan Chen , Shigui Du

{"title":"An empirical statistical constitutive relationship for rock joint shearing considering scale effect","authors":"Hang Lin , Shijie Xie , Rui Yong , Yifan Chen , Shigui Du","doi":"10.1016/j.crme.2019.08.001","DOIUrl":"10.1016/j.crme.2019.08.001","url":null,"abstract":"<div><p>The scale effect of rock joint shearing is of great significance in rock engineering. Most existing shear constitutive models could describe the pre- and post-peak deformation of rock joints, but only in one particular scale, that is, those existing models will fail to depict the rock joint shearing in different length scales. Therefore, this study aims to establish a constitutive relationship for rock joints with considering the scale effect. Based on the assumption of a random statistical distribution of rock material strength and statistical mesoscopic damage theory, damage variables are defined as the ratio of the number of damaged elements to the total number in the shear process. Together with the nonlinear relationship between the microelement failure and the joint scale, an empirical statistical constitutive relationship for joint is established. And then, the determination method of constitutive relationship parameters and the variation laws with the scale are discussed. Results show that the predicted results of the proposed empirical relationship not only agree well with the experimental results but also fully describe nonlinear deformation, pre-peak softening, post-peak softening, residual stage, and other mechanical properties of the shear deformation of joint with different dimensions, thereby demonstrating the rationality of the constitutive relationship. The physical meaning of the constitutive relationship parameters is clear, and the expressions of the constitutive relationship parameters can be deduced from the experimental results. In addition, the influence of scale effect on the shear deformation of rock joints can be quantified using parameters, which help accurately describe the action form of scale effect.</p></div>","PeriodicalId":50997,"journal":{"name":"Comptes Rendus Mecanique","volume":"347 8","pages":"Pages 561-575"},"PeriodicalIF":0.8,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crme.2019.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134495658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43

Prediction of fatigue crack growth life under variable-amplitude loading using finite element analysis 变幅载荷下疲劳裂纹扩展寿命的有限元预测

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-08-01 DOI: 10.1016/j.crme.2019.06.008

Amina Remadi, Ahmed Bahloul, Chokri Bouraoui

引用次数: 10

Asymptotic analysis of a thin linearly elastic plate equipped with a periodic distribution of stiffeners 具有周期性加强筋分布的线弹性薄板的渐近分析

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-08-01 DOI: 10.1016/j.crme.2019.07.001

Christian Licht , Thibaut Weller

引用次数: 1

Saumur à l'époque d'Abraham de Moivre 亚伯拉罕·德·莫弗时代的索米尔

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.002

Susi Calvert

引用次数: 0

Abraham de Moivre : ses traces dans les mathématiques. Une analyse bibliométrique 亚伯拉罕·德·莫弗:他的数学足迹。文献计量分析

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.006

Conor J. Maguire

引用次数: 0

Abraham de Moivre, sa vie et son œuvre 亚伯拉罕·德·莫弗，他的生活和工作

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.003

Marie-Claire Coët, Bruno Chanetz

引用次数: 0

Hommage à Abraham de Moivre 向亚伯拉罕·德·莫弗致敬

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.004

Bruno Chanetz (Professeur associé à l'université de Paris-Nanterre)

引用次数: 0

L'application des nombres complexes au calcul des profils d'aile 复数在翼型计算中的应用

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.005

Bruno Chanetz

引用次数: 0

De Moivre, précurseur des mathématiques modernes 德·莫弗，现代数学的先驱

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-07-01 DOI: 10.1016/j.crme.2019.06.007

Piotr Graczyk , Emmanuelle Guernier , Jean-Jacques Loeb

引用次数: 0

Effect of non-persistent joints distribution on shear behavior 非持久节理分布对剪切性能的影响

IF 0.8 4区工程技术

Comptes Rendus Mecanique Pub Date : 2019-06-01 DOI: 10.1016/j.crme.2019.05.001

Hang Lin , Xuran Ding , Rui Yong , Wanzhong Xu , Shigui Du

{"title":"Effect of non-persistent joints distribution on shear behavior","authors":"Hang Lin , Xuran Ding , Rui Yong , Wanzhong Xu , Shigui Du","doi":"10.1016/j.crme.2019.05.001","DOIUrl":"10.1016/j.crme.2019.05.001","url":null,"abstract":"<div><p>The particle flow code 2D (PFC2D) is used to establish a coplanar, non-persistent joint model. Three joint distribution types, namely, both-side (type a), scattered (type b), and central (type c), are set according to their position. Numerical simulations of the direct shear test are conducted to investigate the effect of non-persistent joint distribution and connectivity on shear mechanical behavior. Simulation results are in good agreement with the analytical solutions to Jennings' criterion, and show: (1) type-c and type-b joints have high strength, whereas type-a joints have low strength. Shear strength and modulus increase with a decrease in joint persistency, and the shear displacement that correspond to shear strength increases with a decrease in persistency. (2) The brittle failure characteristics of the sample are evident when the intact rock bridge area is large. Reinforcement at both ends of the joint limits shear deformation, and shear strength can be effectively improved when joint persistency is large. The small-area dispersed reinforcement joint method cannot effectively improve shear strength. (3) The comprehensive shear strength parameters and the shear strength of the non-persistent joints can be predicted well using Jennings' criterion. Cohesion is the dominant factor that controls shear strength.</p></div>","PeriodicalId":50997,"journal":{"name":"Comptes Rendus Mecanique","volume":"347 6","pages":"Pages 477-489"},"PeriodicalIF":0.8,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.crme.2019.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123423710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36