分形尺度和试样尺寸对蠕变阻力的影响

IF 0.4 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Strength Fracture and Complexity Pub Date : 2020-10-01 DOI:10.3233/sfc-200259

A. Carpinteri, G. Niccolini, A. Rubino

{"title":"分形尺度和试样尺寸对蠕变阻力的影响","authors":"A. Carpinteri, G. Niccolini, A. Rubino","doi":"10.3233/sfc-200259","DOIUrl":null,"url":null,"abstract":"Scaling effects governing the creep behaviour of unnotched and uncracked metallic specimens are investigated by applying similarity considerations and fractal modelling to experimental results provided in the literature. The focus is on stress rupture tests conducted at elevated temperatures on Cr-Mo-V steel cylindrical bars of different sizes. The observed specimen-size effects on the 𝜎 versus tR creep resistance diagrams are interpreted in terms of incomplete self-similarity and fractal weakening (lacunarity) of the specimen reacting cross-section. That leads to a scale-invariant (fractal) formulation of the creep rupture law in terms of renormalized stress.","PeriodicalId":41486,"journal":{"name":"Strength Fracture and Complexity","volume":"1 1","pages":"1-10"},"PeriodicalIF":0.4000,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/sfc-200259","citationCount":"1","resultStr":"{\"title\":\"Fractal scaling and specimen-size effects on creep resistance\",\"authors\":\"A. Carpinteri, G. Niccolini, A. Rubino\",\"doi\":\"10.3233/sfc-200259\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Scaling effects governing the creep behaviour of unnotched and uncracked metallic specimens are investigated by applying similarity considerations and fractal modelling to experimental results provided in the literature. The focus is on stress rupture tests conducted at elevated temperatures on Cr-Mo-V steel cylindrical bars of different sizes. The observed specimen-size effects on the 𝜎 versus tR creep resistance diagrams are interpreted in terms of incomplete self-similarity and fractal weakening (lacunarity) of the specimen reacting cross-section. That leads to a scale-invariant (fractal) formulation of the creep rupture law in terms of renormalized stress.\",\"PeriodicalId\":41486,\"journal\":{\"name\":\"Strength Fracture and Complexity\",\"volume\":\"1 1\",\"pages\":\"1-10\"},\"PeriodicalIF\":0.4000,\"publicationDate\":\"2020-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.3233/sfc-200259\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Strength Fracture and Complexity\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3233/sfc-200259\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, CHARACTERIZATION & TESTING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Strength Fracture and Complexity","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3233/sfc-200259","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}

引用次数: 1

摘要

通过将相似性考虑和分形模型应用于文献中提供的实验结果，研究了控制无缺口和无裂纹金属试样蠕变行为的尺度效应。重点研究了不同尺寸Cr-Mo-V钢圆柱棒在高温下的应力断裂试验。观察到的试件尺寸对试件蠕变阻力图的影响可以用试件反应截面的不完全自相似和分形减弱(空洞)来解释。这导致了一个尺度不变的(分形)公式的蠕变破裂规律的重整应力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Fractal scaling and specimen-size effects on creep resistance

Scaling effects governing the creep behaviour of unnotched and uncracked metallic specimens are investigated by applying similarity considerations and fractal modelling to experimental results provided in the literature. The focus is on stress rupture tests conducted at elevated temperatures on Cr-Mo-V steel cylindrical bars of different sizes. The observed specimen-size effects on the 𝜎 versus tR creep resistance diagrams are interpreted in terms of incomplete self-similarity and fractal weakening (lacunarity) of the specimen reacting cross-section. That leads to a scale-invariant (fractal) formulation of the creep rupture law in terms of renormalized stress.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Strength Fracture and Complexity MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.30

自引率

0.00%

发文量

期刊介绍： Strength, Fracture and Complexity: An International Journal is devoted to solve the strength and fracture unifiedly in non linear and systematised manner as complexity system. An attempt is welcome to challenge to get the clue to a new paradigm or to studies by fusing nano, meso microstructural, continuum and large scaling approach. The concept, theoretical and/or experimental, respectively are/is welcome. On the other hand the presentation of the knowledge-based data for the aims is welcome, being useful for the knowledge-based accumulation. Also, deformation and fracture in geophysics and geotechnology may be another one of interesting subjects, for instance, in relation to earthquake science and engineering.