Engineering estimates of crack opening displacement for non-idealized circumferential through-wall cracks in pipe

Engineering C*‐integral and COD estimates for nonidealized circumferential through‐wall cracked pipes at elevated temperature

“…where h 1 and h 2 are the plastic influence functions which are calibrated from detailed FE results, and the values according to geometry and position along the crack front (ϕ) are given in Cho et al [6][7][8] Q and Q L denote the applied load (general) and plastic limit load (general) for idealized circumferential TWC in pipes, respectively, and the solutions of plastic limit loads for the bending moment (M), axial tension (T), and internal pressure (p) are expressed as follows 9,10 :…”

“… denotes creep strain rate, and A and n are material constants. In the GE/EPRI approach, the schemes of plastic J ‐integral and COD for nonidealized circumferential TWC in pipes can be expressed as follows: where h 1 and h 2 are the plastic influence functions which are calibrated from detailed FE results, and the values according to geometry and position along the crack front ( ϕ ) are given in Cho et al Q and Q L denote the applied load (general) and plastic limit load (general) for idealized circumferential TWC in pipes, respectively, and the solutions of plastic limit loads for the bending moment ( M ), axial tension ( T ), and internal pressure ( p ) are expressed as follows: …”

“…Thus, the inner, mid, and outer points of nonidealized TWC along the crack front have different values of fracture mechanics parameters, whereas idealized TWC has constant value through the thickness. For estimating elastic‐plastic fracture mechanics parameters for nonidealized TWC, recently, Cho et al, have proposed the engineering schemes of J ‐integral and COD for elastic‐plastic fracture mechanics. However, the study on estimations of C * ‐integral and COD rate is not pursued although these parameters should be calculated to apply the LBB assessment under high‐temperature condition.…”

Ecological-Economic and Technical Advantages of Reinforced Concrete Girders with Combined Reinforcement

“…3 circumferential through-wall cracks in pipe [20]; Assessing steel strains on reinforced concrete members from surface cracking patterns [21]; Numerical limit analysis of steelreinforced concrete walls and slabs [22]; A crack opening stress equation for in-phase and out-of-phase thermomechanical fatigue loading [23]; Crack opening estimate in reinforced concrete walls using a steel-concrete bond model [24]; A numerical method to generate optimal load paths in plain and reinforced concrete structures [25]; Stress-strain behavior of freshly compressed concrete under axial compression with a practical equation [26]; Experimental and numerical study on static behavior of elastic concrete-steel composite beams [27]; Stress-strain behavior of actively and passively confined concrete under cyclic axial load [28].…”

Ecologically Safe and Techno Economically Efficient Reinforced Concrete Constructions of Equal Resistance

“…A cost effective and environmental friendly approach [17]; Mix proportion of eco-friendly fireproof high-strength concrete [18]; Building life cycle optimization tools for early design phases [19]; Innovative mineral fiber insulation panels for buildings [20]; Thermal and acoustic characterization Original [21]; Improving the thermal performance of concretesandwich envelopes in relation to the moisture behaviour of building structures in boreal conditions [22]; Methodology of energy efficient building refurbishment: Application on two university campus-building case studies in Italy with engineering students [23]; Structural recycled aggregate concrete made with precast wastes [24]; Experimental and numerical study on static behavior of elastic concrete-steel composite beams [25]; High resolution analysis of opening and sliding in fatigue crack growth [26]; Stress-strain behavior of freshly compressed concrete under axial compression with a practical equation [27]; Experimental and numerical study on static behavior of elastic concrete-steel composite beams [28]; Stress-strain behavior of actively and passively confined concrete under cyclic axial load [29]; Modeling and analysis of gear tooth crack growth under variable-amplitude loading [30]; Crack-tip-opening displacement for four symmetrically situated cracks with coalesced interior yield zones [31]; Crack tip opening displacement in a linear strain hardening material [32]; Interface cracks with initial opening under harmonic loading [33]; Determination of a cohesive law for delamination modelling -Accounting for variation in crack opening and stress state across the test specimen width; Analysis of crack opening stresses for center-and edge-crack tension specimens; A model of crack opening stresses in variable amplitude loading using smooth specimen fatigue test data for three steels; Engineering estimates of crack opening displacement for non-idealized circumferential through-wall cracks in pipe [34]; A crack opening stress equation for inphase and out-of-phase thermomechanical fatigue loading [35].…”