PSI - Issue 16

Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 16 (2019) 105–112

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. © 2019 The Author(s). Published by Els evier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers el is proposed to investig te the propagation of f tigue physically and mechanically short cracks r macroc acks in plat s on smo th stress rise s as well as to d te mine the p riod of their subcritical growth. The model is based on the first law of thermodynamics for an elementary act of fatigue crac propagation and on the boundary interpolation technique for the approximated determination of the d formation in the pre-fracture zone near the crack tip. © 2019 The Author(s). Published by Els evier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers The mathematical model is proposed to investigate the propagation of fatigue physically and mechanically short cracks or macrocracks in plates on smooth stress risers as well as to determine the period of their subcritical growth. The model is based on the first law of thermodynamics for an elementary act of fatigue crac propagation and on the boundary interpolation technique for the approximated determination of the deformation in the pre-fracture zone near the crack tip. The mathematical Keywords: short crack; computational model; short crack propagation rate; period of subcritical fatigue crack growth 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Short crack problem in delayed fracture mechanics Yuri Lapusta a , Oleksandr Andreikiv b *, Nataliya Yadzhak b a French National Centre for Scientific Research, University of Clermont Auvergne, 49 boulevard François Mitterrand, Clermont-Ferrand 63000, France b Ivan Franko National University of Lviv, 1, Universytetska St., Lviv 79000, Ukraine 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Short crack problem in delayed fracture mechanics Yuri Lapusta a , Oleksandr Andreikiv b *, Nataliya Yadzhak b a French National Ce tre for Scientific Research, University of Clermont Auvergne, 49 boulevard François Mitterrand, Clermont-Ferrand 63000, France b Ivan Franko National University of Lviv, 1, Universytetska St., Lviv 79000, Ukraine Abstract Abstract

Keywords: short crack; computational model; short crack propagation rate; period of subcritical fatigue crack growth

1. Introduction

1. Introduction

In delayed fracture mechanics, the amplitudes of loads applied to a body are smaller than the critical. The loads can have different characteristics: be long-term, static, cyclic or manoeuvre. There is also a working environment that is defined by physicochemical factors such as high temperature, neutron exposure, hydrogenous or corrosive environment. In delayed fracture mechanics, the amplitudes of loads applied to a body are smaller than the critical. The loads can have different characteristics: be long-term, static, cyclic or manoeuvre. There is also a working environment that is defined by physicochemical factors such as high temperature, neutron exposure, hydrogenous or corrosive environment.

* Corresponding author. Tel.: +38-032-263-2044. E-mail address: andreykiv@ipm.lviv.ua * Corresponding author. Tel.: +38-032-263-2044. E-mail address: andreykiv@ipm.lviv.ua

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers 2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. 10.1016/j.prostr.2019.07.028