• Issue

    Fatigue & Fracture of Engineering Materials & Structures: Volume 46, Issue 1

    1-360
    January 2023

ISSUE INFORMATION

Free Access

Issue Information

  • Pages: 1-2
  • First Published: 13 December 2022

ORIGINAL ARTICLES

Low cycle fatigue behavior of Cu-Cr-Zr alloy with different cold deformation

  • Pages: 3-16
  • First Published: 05 October 2022
Highlights

  • Bauschinger effect was found in LCF behavior of Cu-Cr-Zr alloys.
  • The microstructure changes before and after LCF test were observed.
  • The LCF life of Cu-Cr-Zr alloy may not be improved by large cold deformation.
  • The LCF behavior of Cu-Cr-Zr alloy was consistent with Manson–Coffin–Basquin formula.

In situ experimental study on fracture toughness and damage mechanism of TiB2-reinforced steel matrix composites

  • Pages: 17-31
  • First Published: 30 September 2022
Highlights

  • TiB2-reinforced SMCs with 9 vol% and 13 vol% are prepared by eutectic solidification
  • The fracture property of SMCs is investigated through in situ three-point bending tests
  • Hot rolling effectively improves the tensile strength and fracture toughness of SMCs
  • Optimized particle characteristics and matrix plasticity enhance the fracture resistance

Open Access

Experimental tests and FE simulations to compute the mechanical and fracture properties of the shot-earth 772

  • Pages: 49-62
  • First Published: 04 October 2022
Highlights

  • The mechanical and fracture characterization of shot-earth 772 is performed.
  • Flexural, compression and fracture tests are carried out on the shot-earth specimens.
  • Numerical analyses are performed by using a homemade micromechanical finite element model.
  • Flexural behavior and fracture behavior of shot-earth 772 are numerically simulated.

Effect of stress wave propagation phenomenon on the determination of strain energy density theory parameters and dynamic J-integral

  • Pages: 63-79
  • First Published: 03 October 2022
Highlights

  • Stress wave propagations strongly influence the behavior of dynamic fracture problems.
  • Averaging dynamic J-integrals from multiple domain sizes yields accurate results.
  • The locations of minimum global energy densities are determined by wave propagations.
  • Computations are handled with new capabilities added to FRAC3D program.

Validation of time temperature superposition principle for high modulus asphalt concrete in the linear viscoelastic and fatigue domains

  • Pages: 80-95
  • First Published: 26 September 2022
HIGHLIGHTS

  • Same shift factor (aT) in the linear viscoelastic (LVE) and fatigue domains.
  • Superimposed Fatigue curves in equivalent time confirm the validity of the TTSP.
  • Fatigue lives at different θ eqi , f ri that respects TTSP are not statistically different.
  • Recovery path after fatigue loading periods also verified TTSP.

Evaluating MTS criterion in predicting mixed-mode crack extension under different loading conditions

  • Pages: 96-110
  • First Published: 26 September 2022
HIGHLIGHTS

  • The suitability of the MTS criterion is examined under different loading conditions.
  • Under indirect tensile loading, the MTS criterion overestimates crack initiation angle.
  • The MTS criterion underestimates the angle in the specimen under 3-point bending.
  • Initiation angle can be predicted properly based on stress distribution around crack tip.

Fatigue failure modes of rib-to-deck joints under the multiaxial stress states caused by various wheel loading characteristics

  • Pages: 111-124
  • First Published: 01 October 2022
Highlights

  • Multiaxial stress for rib-to-deck joints in various wheel loading cases was calculated.
  • Equivalent structural stress was calculated to analyze the fatigue failure modes.
  • Effect of wheel loading position and quantity on the fatigue failure mode were discussed.
  • Failure mode transition for welded joint in the wheel load moving process was analyzed.

Experimental and theoretical investigation on mechanical behaviors of TB991 weld sealant under cyclic loading

  • Pages: 125-136
  • First Published: 01 October 2022

  • TB991 weld sealant was experimentally investigated under cyclic loading conditions.
  • The evolution of relaxation stress, cyclic softening, and dissipated energy was investigated.
  • A constitutive model was proposed to describe the mechanical behavior of the material under cyclic loading conditions.
  • The proposed model can consider the cyclic stress relaxation and cyclic softening of the materials.

Sensitivity and uncertainty analysis for structural health monitoring with crack propagation under random loads: A numerical framework in the frequency domain

  • Pages: 137-152
  • First Published: 05 October 2022
Highlights

  • A framework for sensitivity analysis of fatigue crack under random loads is presented.
  • A probabilistic estimation of the remaining useful life is obtained.
  • Uncertainty analysis can help improve the development of SHM systems.

Thermometric investigations for the characterization of fatigue crack initiation and propagation in Wire and Arc Additively Manufactured parts with as-built surfaces

  • Pages: 153-170
  • First Published: 02 October 2022
Highlights

  • Fatigue cracks on as-built WAAM surfaces can be monitored via infrared thermography.
  • Fatigue life of as-built WAAM samples is dominated by a crack propagation phase.
  • The link between surface stress concentration and crack initiation is nondeterministic.

Self-heating measurements under cyclic loading to identify history effects on HCF properties of high-strength low-alloy steel: Part I—Experimental investigations

  • Pages: 171-181
  • First Published: 30 September 2022
Highlights

  • Study of load history effects on HCF properties by means of self-heating measurements.
  • Focusing on two load history: plastic pre-strain and a cyclic pre-loading.
  • Reducing dedicated-time for fatigue characterization.

Softening response of cast Al-Si-Cu samples tested under low-cycle-fatigue and fatigue-creep regime and elevated temperate: Experimental and analysis

  • Pages: 199-211
  • First Published: 08 October 2022
Highlights

  • The softening behavior of LCF and LCFC was experimented and studied.
  • The microstructure evolution of LCF and LCFC were studied.
  • The effect of creep on LCFC and the fracture mechanism of LCFC were investigated.
  • An improved modified model was established by combining Chaboche model and θ-projection model

Open Access

Bayesian optimized collection strategies for fatigue strength testing

  • Pages: 228-243
  • First Published: 08 October 2022
Highlights

  • We present anopen-source Bayesian analysis for fatigue data.
  • Bayesian maximum entropy sampling is used in novel protocols for fatigue testing.
  • Better efficiency in measuring fatigue behavior was demonstrated.
  • Methods were verified through mesoscale ultrasonic experiments.

A generalized model for dynamic mixed-mode fracture via state-based peridynamics

  • Pages: 244-258
  • First Published: 04 October 2022
Highlights

  • Mixed-mode I/II dynamic fracture via state-based peridynamics for the first time.
  • Obtaining fracture angles directly via peridynamics without calculating stress intensity factors (SIFs).
  • Properly predicting dynamic effects on mixed-mode I/II fracture behavior.
  • Supporting the proposed model by various examples and previous literature results.

Multi-scale analyses on mechano-electric degradation of film interconnects in flexible electronics

  • Pages: 259-270
  • First Published: 13 October 2022
Highlights

  • A multi-scale mechano-electric degradation model for film interconnect is developed.
  • The combined effect of thickness and grain size is reflected in the proposed model.
  • Damage and electrical degradation of film interconnect can be effectively predicted.
  • Films less affected by pre-stretching are also suitable for the proposed model.

Open Access

A comparative study on fatigue indicator parameters for near-α titanium alloys

  • Pages: 271-294
  • First Published: 10 October 2022
Highlights

  • Comparative study of is performed on different fatigue indicator parameters in the same CPFE framework.
  • Some FIPs show similar critical sites and crystallography thereof, consistent with experimental data.
  • CP results of these FIPs capture the experimental orientation range transition of critical sites from pure to dwell fatigue load.
  • Proposed FIP, solely based on dislocation density, is validated through comparison with other FIPs and experiments.

Low-cycle fatigue characteristics and fracture behavior of the die-forged 2014 aircraft wheel

  • Pages: 295-309
  • First Published: 10 October 2022
Highlights

  • A new die forging method was used to fabricate the aircraft wheel.
  • Fatigue characteristics and fracture behavior of aircraft wheels were explored.
  • The accuracy of different fatigue life prediction models was evaluated.
  • Coarse Al12(MnSi)2(FeCu) intermetallic particles affected fatigue crack initiation.

Open Access

An experimental study on residual stress relaxation in low-cycle fatigue of Inconel 718Plus

  • Pages: 310-324
  • First Published: 12 October 2022
Highlights

  • Residual stress relaxation in low-cycle fatigue is experimentally evaluated.
  • Residual stress relaxation occurs if a threshold value of stress–strain state is reached.
  • A two-stage analytical model based on the plastic strain energy W per cycle is proposed.

Fatigue crack propagation behavior of multiphase microstructure in a quenched and partitioned medium-carbon bainitic steel

  • Pages: 325-340
  • First Published: 20 October 2022
Highlights

  • The B-QP sample exhibits a lower FCP rate and higher fatigue threshold.
  • The crack tortuosity and secondary cracks are the mainly reasons for the lower FCP rate.
  • The B-QP sample shows a pronounced small plateauing caused by the mechanical twinning.