The relationships between the fatigue crack growth rate ( d a / N ) and stress intensity factor range Δ K are not always linear even in Paris region. ratio effects on diverse different materials. However, most existing models cannot handle these nonlinearities appropriately. machine learning method provides flexible approach to modeling of because its excellent nonlinear approximation multivariable ability. In this paper, calculation is proposed based three algorithms (MLAs): extreme (ELM),...

The large volume expansion of a silicon anode induces serious mechanical failure and limits its applications. Owing to the intrinsic weak van der Waals force poor toughness, it is unable solve this issue with current commercial poly(vinylidene difluoride) (PVDF) binder. development binder strong binding strength (Si) urgent. Herein, hydroxyl-rich three-dimensional (3D) network synthesized by chemical cross-linking reactions between epichlorohydrin (ECH) sodium hyaluronate (SH), which...

Abstract Cold-induced sweetening (CIS) results in browning and acrylamide formation fried potato products. β-Amylase (BAM) vacuolar invertase (INV) are crucial for starch–sugar conversion cold-stored potatoes. This research investigates the effects of salicylic acid (SA) treatment on CIS potatoes gene regulation during this process. The findings revealed that SA significantly alleviated by suppressing StBAM1 StINV1 expression potato. Moreover, two transcription factors (TFs), StAP2/ERF...

Abstract Fatigue damage and fracture of metals are the major failure modes mechanical structures. Studying fatigue crack growth (FCG) behaviour under overload effects can better explain loading interactions develop more accurate FCG prediction models. This research innovatively designed established experimental system that is suitable for test variable amplitude (VAL). Systematically, experiments were carried out by introducing single tensile overload, compressive tensile/compressive...

Thermal barrier coating (TBC) is a critical material in the aerospace domain to increase lifetime of gas turbine components subjected thermal load. The properties TBC are strongly related growth thermally grown oxide (TGO) whose main constituent Al2O3. However, oxidation Cr and Co can affect TGO, which not studied sufficiently. In this paper, high-temperature exposure at 1000 °C was performed investigate effect oxides on TGO growth. morphology composition analysis interface between ceramic...

A Fiber Bragg Grating (FBG) interrogation system with a self-adaption threshold peak detection algorithm is proposed and experimentally demonstrated in this study. This composed of field programmable gate array (FPGA) advanced RISC machine (ARM) platform, tunable Fabry-Perot (F-P) filter optical switch. To improve resolution, the F-P was employed. As non-linear, causes shifting central wavelengths deviation compensated by parts circuit. Time-division multiplexing (TDM) FBG sensors achieved...

Based on the small time scale method, influence of grain boundary fatigue crack growth 7050-T7451 has been investigated. The interaction between and was investigated by in situ SEM testing. Results showed that will be retarded when angle is greater than 90 degrees. Mechanism analysis tip would not able to open until loading reached 55% maximum load, had closed completely before reduced minimum value, which led retardation. When aluminum alloy suffered from with constant amplitude, a behavior...

Brittle fracture of large forging equipment usually leads to catastrophic consequences. To avoid this kind accident, the brittle behaviors a die holder were studied by simulating practical application. The is used on press, and it made 55NiCrMoV7 hot-work tool steel. Detailed investigations including mechanical properties analysis, metallographic observation, fractography, transmission electron microscope (TEM) analysis selected area diffraction (SAED) conducted. results reveal that material...

Titanium-alloy weldments have been extensively used in engineering structures, and accurate estimation of the fatigue life is beneficial for avoiding catastrophic failures titanium-alloy structures. The weld pore a common defect these that significantly influences process. In this study, weld-pore size depth its effect on Ti-6Al-2Zr-1Mo-1V (TA15) alloy are investigated by adopting tests fracture observations. results show crack initiations occurred at pores all specimens. diameter surfaces...

ABSTRACT Polyethylene glycol grafted calcium alginate hydrogel microspheres are synthesized by ring‐opening and addition reaction of epoxy chloropropane. FTIR, 13 C NMR, optical microscope, SEM, TG, DSC used for characterization. Swelling behaviors studied it is found that polyethylene improved in anti‐swelling properties. Protein‐imprinted exhibit enhanced specific rebinding quantity (11.16 mg/g) selective recognition properties (4.71 against BHb), towards target molecule the presence...

In-situ scanning electron microscopy (SEM) testing based on a small time scale is proposed to integrally investigate the fatigue crack growth behavior and mechanisms, which different from widely-used, cycle-based approach due its comprehensive analysis of effects microstructure, closure applied loading growth. In methodology, at any within cycle observed by SEM influence microstructure Images with high resolution are taken measure tip opening displacement (CTOD), correlation between CTOD...

Panax japonicus C. A. Meyer is renowned for its significant therapeutic effects and commonly used worldwide. Its active ingredients, triterpenoid saponins, show variation in content among different tissues. The tissue-specific distribution of saponins potentially related to the expression vital genes biosynthesis pathway. In this study, contents five (ginsenoside Ro, chikusetsusaponin IV, IVa, ginsenoside Rg1, Rb1) three tissues were determined by HPLC. Transcriptome sequencing analysis...

Practical application of a Si anode in high-energy-density battery cannot be achieved due to the huge volume expansion these anodes. Researchers have focused on binders restrict order address this issue, as hydrogen bonds and mechanical properties can used enhance adhesion accommodate changes anode. Herein, we comprehensively consider binders' bonds, properties, stability, compatibility with electrolyte solution, design an ether-/ester-/fluorine-rich composite polymer, named...

Based on the small time scale method, unstable fatigue crack propagation of 7050-T7451 aluminum alloy could be observed directly from in-situ SEM by manner step loading. The results show that when was blocked grain boundary, opening and closure stresses are increased 0.88 times 0.58 respectively comparing with value in general case. retardation prematurity associated constraint tip slipping imposed boundary. stress decreased gradually increase loading cycles, which led to acceleration bridge...

The comprehensive multi-dimensional experimental method is proposed to concurrently investigate the crack growth rate, microstructure effect, closure and tip plastic zone in one fatigue experiment. In methodologies, experiment performed loading specimen under constant amplitude loading, opening displacement (COD) gauge used measure length. A self-developed micro-optical system verify length at same time study effect of on growth. Then correlation between rate stress intensity factor (SIF)...

The practical application of Si anode in the high energy density battery cannot be achieved due to its huge volume expansion. Many previous focused on binders address this issue. hydrogen bonds and mechanical properties used enhance adhesion accommodate changes anode. Herein, we comprehensively considerate bonds, properties, stability compatibility with electrolyte solution binder. An ether/ester/fluorine rich composite polymer, P(TFEMA-co-IBVE), is designed. binder formula possesses...