Showing papers in "Engineering Failure Analysis in 2022"

TL;DR: In this paper , the failure mechanism and control technology of the gob-side entry retaining in short-distance coal seam were investigated in Xieqiao mine, and the onsite monitoring showed that the maximum subsidence of the reserved roof along the gob was 180 mm and the maximum approaching distance of the two banks was 328 mm, which met the engineering requirements.

TL;DR: Based on the theory of crack initiation and propagation, the authors proposes a life prediction algorithm considering residual stress; carries out a bending vibration fatigue experiment and simulation fatigue life analysis of aero-engine blade grinding with abrasive belt; compares the results of experiments and simulations and proposes a residual stress equivalent calibration method.

TL;DR: Based on the theory of crack initiation and propagation, the authors proposes a life prediction algorithm considering residual stress; carries out a bending vibration fatigue experiment and simulation fatigue life analysis of aero-engine blade grinding with abrasive belt; compares the results of experiments and simulations and proposes a residual stress equivalent calibration method.

TL;DR: In this paper, the authors proposed a model for high-temperature fretting fatigue life prediction of dovetail structure of aero-engine compressor, which is based on the circular flat contact theory and continuous damage mechanics theory.

TL;DR: In this article , a high-temperature fretting fatigue life prediction model considering the temperature effect is proposed, and a criterion suitable for the high temperature fatigue crack initiation failure is proposed.

TL;DR: It was found that most current research utilizes field data, simulation data, and experimental data, with field data being the most often used, and ANN, SVM, and hybrid models outperform due to the combined strength of the constituent models.

TL;DR: In this paper , a coupled model between an artificial neural network (ANN) and antlion optimizer (ALO), so-called ALOANN, is proposed to detect damage in fixed-free plate structures.

TL;DR: Based on the collapse of a tunnel in Xi'an Metro Line 3 near a ground fissure, potential causes and corresponding mechanisms were analyzed in this paper , which indicated that hydraulic erosion induced loose pressure and crack-rich soil below the initial support were mainly attributed to be the triggering force of the collapse.

TL;DR: A recent systematic review of machine learning-based integrity assessments of corroded oil and gas pipelines is presented in this paper , which provides an overview of the most frequently used machine learning models for corroded pipeline integrity evaluation.

TL;DR: In this article , an adaptive convolutional neural network (CNN) is constructed based on the ontology representation of pump for fault diagnosis of hydraulic piston pump, which has better performance compared with other modern intelligent methods.

TL;DR: In this paper , the authors focus on methodologies (theoretical models, numerical simulations, and field measurements) for estimating coal pillar system loads and strength, and the primary factors for instability evaluation are noted.

TL;DR: In this article, the seismic response of masonry buildings damaged during the 2019 Mw 6.4 earthquake was investigated, and four important typologies were selected to draw general conclusions from the performance analysis and damage assessment.

TL;DR: In this paper , the authors investigated the seismic response of masonry buildings damaged during the 2019 Albanian earthquake and assessed the performance by means of pushover analyses on four template buildings.

TL;DR: Wang et al. as discussed by the authors examined the characteristics and causes of tunnel failure in water-rich strata and proposed a complete set of solutions against cracks, water seepage and inverted uplift and other diseases.

TL;DR: In this article , a tunnel construction project on the Sichuan-Tibet 318 Highway Line in China is studied, where the authors introduce detailed failure phenomena encountered in the tunnel constructed in the loose granular stratum and propose construction countermeasures from pre-support, excavation, bolt driving, and collapse prevention.

TL;DR: In this paper , a method was proposed to approximate evaluation of the curing quality by monitoring the surface temperature of UV-CIPP material during the curing process, and the authors analyzed the flexure failure process and the causes of failure of CIPP materials by considering the effects of construction parameters, combined with the monitored material surface peak temperature.

TL;DR: In this paper , a tri-linear bond-slip model was embedded in the Pile elements to reveal the failure mechanism of a full-grouted bolting system, and the revised Pile element was selected to numerically reveal the anchoring performance of full grouted anchor bolts.

TL;DR: In this article , a bimetallic steel bar (BSB) composed of stainless-steel cladding and carbon steel substrate is suggested to improve the durability of reinforced concrete (RC) structures.

TL;DR: In this paper , the results of an in-situ test and experimental study on a reinforced concrete wet quenching tower that had been exposed to high temperature and dry-wet cycles for 34 years were presented.

TL;DR: In this paper , the authors focused on the issue of static electricity, which is one of the serious threats onboard and can cause large explosions under hazardous conditions if a discharge is in contact with nearby flammable gases or air mixture.

TL;DR: In this paper , the influence of relative density on deformation and failure characteristics for a shield tunnel in sandy cobble strata was investigated, and it was shown that relative density has a significant impact on the extent of surface subsidence.

TL;DR: Based on the cohesive finite element method, an interelement fracture model has been proposed in this paper to investigate the cracking behavior, as well as its influence on the load-carrying capacity, of reinforced concrete (RC) structural elements under static loading conditions.

TL;DR: In this paper , a comprehensive review on hydrogen permeation, diffusion and trapping, as well as the resulting hydrogen degradation at pipeline welds is presented, where a combination of computational modeling and material characterization with an improved spatial resolution can advance our understanding about the hydrogen degradation of the high-strength steel pipeline weld.

TL;DR: In this paper , the authors provide a comprehensive numerical insight into the earthquake response and seismic vulnerability of historical fortified masonry palaces with corner towers using nonlinear dynamic analyses and a macro-modeling FE-based approach, which is able to take into account the complex interactions between different macro-elements and the characteristics of the seismic action.

TL;DR: In this paper , the effect of different shot peening coverage on surface integrity and fatigue crack growth (FCG) properties of 7B50-T7751 aluminum alloy was reviewed. But, the results showed that the effect was limited at constant amplitude loading.

TL;DR: In this paper , an equivalent stiffness model for the cage bridge is presented to investigate the crack depth and location effects on the bridge structural stiffness and impact forces, and a dynamic model of the planet roller bearing considering the cage crack is proposed to simulate the dynamic behavior of the globe bearing elements.

TL;DR: In this paper, an equivalent stiffness model for the cage bridge is presented to investigate the crack depth and location effects on the bridge structural stiffness and impact forces, and a dynamic model of the planet roller bearing considering the cage crack is proposed to simulate the dynamic behavior of the globe bearing elements.

TL;DR: In this article , a closed-form equation of the limiting pressure factor is presented in order to efficiently and precisely establish and evaluate an undrained limiting pressure behind soil gaps and the lateral force operating on a pile wall in practice.

TL;DR: In this paper , the authors used a high-speed camera and turbine flowmeter to record the primary cavitation flow rate, shedding period of the cavitation cloud, and flow direction length of solutions with different pH values.

TL;DR: In this paper , the effects of process parameters (printing orientation and layer height), thermal annealing process and salt remelting process on tensile properties and anisotrophy of the FDM parts were examined.