Zhengzhou University of Aeronautics

Comprehensive analysis and modeling of ploughing effect in low-frequency vibration-assisted drilling

Low-frequency vibration-assisted drilling (LFVAD), as an advanced drilling process, has shown excellent engineering application prospects in the field of hole-making for difficult-to-cut materials in aerospace. However, LFVAD technology still needs a more comprehensive understand...

Ectomycorrhizal tree relative abundance is associated with higher aboveground biomass but reduced species richness and tree-size variation in temperate–subtropical transition forests

Ectomycorrhizal (EcM) tree species often dominate temperate and warm-temperate forests, yet how variation in their relative abundance is associated with species diversity and aboveground biomass (AGB) remains unclear. We analyzed a total of 6 ha of permanent forest monitoring plo...

Nacre-Inspired Layered Cu2P2O7/Bacterial Cellulose Composites with Low Thermal Expansion and High Strength

Abstract Advanced electronic packaging requires lightweight substrate materials with thermal expansion coefficients compatible with semiconductor components, high mechanical reliability, and low relative permittivity and dielectric loss. However, conventional negative thermal exp...

Multi-objective optimization of TC4/UHMWPE fiber metal laminates for enhanced ballistic performance under fragment impact

This study developed a multi-objective optimization framework for TC4/UHMWPE fiber metal laminates to improve the ballistic limit (V50) and specific energy absorption (SEA) simultaneously. A validated finite element model was first established to predict V50 and SEA and to genera...

Not all charisma is created equal: socialized vs personalized charismatic leadership and subordinates' career growth

Purpose This study aims to examine how socialized and personalized charismatic leadership differentially shape subordinates' career growth opportunities (CGO), providing new insights into leadership's role in career development. Design/methodology/approach We collected three-wave...

The influence of MoS 2 lubricity on the secondary cutting performance of PCD micro-groove textured tools

Micro-textured cutting tools possess unique advantages in reducing cutting forces, lowering chip temperatures, minimizing tool wear, and improving machined surface quality. Nevertheless, the secondary cutting effect induced by micro-textures impairs texture integrity and aggravat...

Performance analysis of U-shaped viscoelastic seismic brace for pipelines

The conventional seismic brace (CSB) reduces pipeline horizontal deformation under seismic loads by providing lateral stiffness. However, CSBs fail to dissipate extra seismic energy and consume energy merely through large deformation, which easily causes local buckling and brace...