Prakash Bharadwaj, Suneel K. Gupta, Punit Arora, J. Chattopadhyay
{"title":"Proposing a New Crack Driving Force Parameter for Fatigue Crack Growth Rate of C–Mn Steel","authors":"Prakash Bharadwaj, Suneel K. Gupta, Punit Arora, J. Chattopadhyay","doi":"10.1111/ffe.14585","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>The present study is aimed at analyzing the fatigue crack growth rate data on compact tension (CT) and three-point-bend (TPB) specimens of C–Mn steel under different positive load ratios. Detailed elastic–plastic finite element analyses have been performed using nonlinear kinematic hardening rule of Chaboche material model. The numerically calculated plastic zone ahead of crack tip has been compared with measured plastic zone using digital image correlation technique. The fatigue crack growth rate curves have been analyzed with respect to different crack driving forces such as (i) single-parameter stress intensity factor (SIF) range, (ii) two-parameter-based SIF (\n<span></span><math>\n <semantics>\n <mrow>\n <msup>\n <mi>K</mi>\n <mo>*</mo>\n </msup>\n </mrow>\n <annotation>$$ {K}&#x0005E;{\\ast } $$</annotation>\n </semantics></math>), and (iii) cyclic plasticity zone–based models. A new crack driving force has been proposed considering cyclic plastic zone and representative plastic strain accumulation within this zone. The \n<span></span><math>\n <semantics>\n <mrow>\n <msup>\n <mi>K</mi>\n <mo>*</mo>\n </msup>\n </mrow>\n <annotation>$$ {K}&#x0005E;{\\ast } $$</annotation>\n </semantics></math> parameter and proposed model resulted in improved assessments for different load ratios and constraint geometries (CT and TPB).</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 4","pages":"1712-1724"},"PeriodicalIF":3.1000,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fatigue & Fracture of Engineering Materials & Structures","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14585","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The present study is aimed at analyzing the fatigue crack growth rate data on compact tension (CT) and three-point-bend (TPB) specimens of C–Mn steel under different positive load ratios. Detailed elastic–plastic finite element analyses have been performed using nonlinear kinematic hardening rule of Chaboche material model. The numerically calculated plastic zone ahead of crack tip has been compared with measured plastic zone using digital image correlation technique. The fatigue crack growth rate curves have been analyzed with respect to different crack driving forces such as (i) single-parameter stress intensity factor (SIF) range, (ii) two-parameter-based SIF (
), and (iii) cyclic plasticity zone–based models. A new crack driving force has been proposed considering cyclic plastic zone and representative plastic strain accumulation within this zone. The
parameter and proposed model resulted in improved assessments for different load ratios and constraint geometries (CT and TPB).
期刊介绍:
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.