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Xu Long

Northwestern Polytechnic University (NPU)

127# YouYi Load

DEPARTMENT OF INDUSTRIAL ENGINEERING

Xi'an, 710072

China

SCHOLARLY PAPERS

17

DOWNLOADS

679

TOTAL CITATIONS

2

Scholarly Papers (17)

1.

Development of Robust Oxidation-Free Cu-Cu Direct Bonding with Micron-Sized Cu–Ag Salt Composite Paste and Deterioration Mechanism During Aging and Power Cycling

Number of pages: 26 Posted: 21 Sep 2022
The University of Osaka - Flexible 3D System Integration Laboratory, affiliation not provided to SSRN, The University of Osaka, The University of Osaka, The University of Osaka, Toppan Forms CO., LTD - Central Research Center, Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Loughborough University, Loughborough University and The University of Osaka - Flexible 3D System Integration Laboratory
Downloads 107 (659,652)

Abstract:

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Direct Cu bonding, sintering, Cu-Ag composite paste, anti-oxidation, SiC electronic packaging, high temperature reliability

2.

Predicting the Bond–Slip Behavior of Steel Reinforcement in Concrete Under Static and Dynamic Loadings by Finite Element, Deep Learning and Analytical Methods

Number of pages: 35 Posted: 19 Jan 2024
Northwestern Polytechnic University (NPU), Liaoning Petrochemical University, Northwestern Polytechnic University (NPU) and Chongqing University
Downloads 69 (883,195)
Citation 1

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Bond-slip behavior, Cohesive model, Loading rate, Finite element simulation, Deep learning method

3.

Development of Micron-Sized Cu–Ag Composite Paste for Oxidation-Free Bare Cu Bonding in Air Condition and its Deterioration Mechanism During Aging and Power Cycling Tests

Number of pages: 30 Posted: 01 Mar 2023
The University of Osaka - Flexible 3D System Integration Laboratory, affiliation not provided to SSRN, The University of Osaka, Toppan Forms CO., LTD - Central Research Center, Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Loughborough University, Loughborough University and The University of Osaka - Flexible 3D System Integration Laboratory
Downloads 60 (961,006)

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Direct Cu bonding, Cu-Ag composite paste, anti-oxidation, SiC electronic packaging, high temperature reliability, power cycling

4.

Phase-Field Modeling of Thermo-Mechanical Fracture in Heterogeneous Porous Materials with Random Microstructures: Insights from Concrete Under Elevated Temperatures

Number of pages: 88 Posted: 23 Jun 2025
Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 58 (980,173)

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Mesoscale modeling, Phase-field fracture model, Concrete degradation, Aggregate volume content, Porosity volume content

5.

Physics-Constrained Machine Learning for Constitutive Modelling of High-Strength Concrete across Strain Rates

Number of pages: 51 Posted: 11 Nov 2025
Northwestern Polytechnic University (NPU), - School of Mechanics and Transportation Engineering and Northwestern Polytechnical University
Downloads 57 (989,921)

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High-Strength Concrete, Physics XGB, SHAP analysis, Constitutive modelling, Strain-rate effects

6.

Unveiling Multi-Scale Damage of Polycrystalline Sintered Silver Nanoparticles by Crystal Plasticity Model

Number of pages: 46 Posted: 26 Apr 2025
Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, Taiyuan University of Science and Technology and Nanjing University of Aeronautics and Astronautics
Downloads 45 (1,121,190)

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Sintered silver nanoparticles, Crystal plasticity, damage of slip systems, multiscale approach

7.

Enhancing Mechanical Properties of High-Strength Recycled Concrete with Basalt Fiber and Nano-Calcium Carbonate: Experimental and Numerical Investigations

Number of pages: 25 Posted: 07 Mar 2025
Northwestern Polytechnic University (NPU), Taiyuan University of Science and Technology, Taiyuan University of Science and Technology, affiliation not provided to SSRN, Taiyuan University of Science and Technology, Taiyuan University of Science and Technology, affiliation not provided to SSRN and Northwestern Polytechnical University
Downloads 40 (1,196,171)
Citation 1

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High-strength recycled concrete, Nano-calcium carbonate, Basalt fiber, Mechanical properties, Constitutive model, Mesoscopic modeling

8.

Size Effect of Nickel-Based Single Crystal Superalloy Revealed by Dynamic Nanoindentation

Number of pages: 26 Posted: 12 Sep 2022
Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Fuzhou University, Northwestern Polytechnic University (NPU) and The University of Osaka - Flexible 3D System Integration Laboratory
Downloads 36 (1,236,159)

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nanoindentation, Dynamic behavior, Size effect, Single crystal superalloy, Hardness

9.

Multi-scale topology optimization of hybrid porous heat sinks using multiple lattice configurations

Number of pages: 50 Posted: 13 Mar 2026
Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnic University (NPU), Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnic University (NPU), affiliation not provided to SSRN and Northwestern Polytechnic University (NPU)
Downloads 31 (1,304,549)

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Topology optimization, Heat sinks, Multi-scale design, Multiple lattice configurations, Darcy-Forchheimer law, Brinkman-Forchheimer equation

10.

Modeling Anisotropic Elasto-Plasticity in Cu-Nb Nanolaminates: Effects of Size and Texture Via Physics-Based and Data-Driven Approaches

Number of pages: 35 Posted: 07 Apr 2025
Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 31 (1,304,549)

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Copper niobium nano-laminates, Elasto-plasticity, Polycrystalline material, Deep learning, Size Effect

11.

Fatigue Mechanism of an Additively Manufactured Aluminium Alloy Up to Very-High-Cycle Regime: Insights from Similarity with High-Strength Steels

Number of pages: 29 Posted: 16 May 2025
Northwestern Polytechnic University (NPU), Beijing Jiaotong University, Northwestern Polytechnic University (NPU) and Chinese Academy of Sciences (CAS) - State Key Laboratory of Nonlinear Mechanics
Downloads 28 (1,345,526)

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very-high-cycle fatigue, crack initiation area, high-strength steels, aluminium alloy, additive manufacturing

12.

Reverse Analysis of Film/Substrate Cohesion by Indentation: A Mesoscopic Perspective

Number of pages: 29 Posted: 01 Oct 2024
Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, Northwestern Polytechnic University (NPU), Taiyuan University of Science and Technology, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 28 (1,345,526)

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Indentation, thin film, cohesive zone model, dimensionless analysis.

13.

Investigation on the Mechanical Properties and Failure Mechanism of High-Strength Recycled Concrete Enhanced with Basalt Fiber and Nano-Calcium Carbonate Under Impact Loading

Number of pages: 29 Posted: 09 Aug 2025
Taiyuan University of Science and Technology, Taiyuan University of Science and Technology, Central South University and Northwestern Polytechnic University (NPU)
Downloads 24 (1,399,036)

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High-strength recycled concrete, Nano-calcium carbonate, Basalt fiber, dynamic mechanical properties, DIF model, Failure mechanism.

14.

Thermomechanical Constitutive Behaviour of 3d Printed Biomimetic Polymer Material Under High Strain Rates

Number of pages: 29 Posted: 27 Feb 2024
Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), Taiyuan University of Science and Technology and Taiyuan University of Technology
Downloads 24 (1,399,036)

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Biomimetic polymer material, thermomechanical loading, High strain rate, Constitutive model

15.

Study on Microstructures and Fatigue-Creep Properties of the Laser Solid Formed Epitaxial Ni-Based Super Alloy

Number of pages: 30 Posted: 05 Mar 2024
Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU), affiliation not provided to SSRN, affiliation not provided to SSRN, Northwestern Polytechnic University (NPU), Northwestern Polytechnic University (NPU) and Northwestern Polytechnic University (NPU)
Downloads 23 (1,424,331)

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Ni-based super alloys, laser solid forming, FE method, fatigue-creep life, failure mechanism.

16.

Machine-learning-driven composition optimization of Al–Co–Cr–Fe–Ni high-entropy alloys with first-principles validation

Number of pages: 42 Posted: 11 May 2026
Taiyuan University of Science and Technology, affiliation not provided to SSRN, affiliation not provided to SSRN, Taiyuan University of Science and Technology and Northwestern Polytechnic University (NPU)
Downloads 13 (1,526,714)

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High-entropy alloys, Machine Learning, First-principles calculations, Mechanical properties, Electronic structure

17.

A multi-stage interface model for hybrid fiber-reinforced cementitious composites: cohesive debonding, frictional wear, and macro-micro fiber hybridization

Number of pages: 53 Posted: 18 Apr 2026
Northwestern Polytechnic University (NPU), Northwestern Polytechnical University, Kabul Polytechnic University and - School of Mechanics and Transportation Engineering
Downloads 5 (1,571,455)

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Fiber reinforced cementitious composites, cohesive zone modeling, fiber pull-out, wear, friction degradation, fiber hybridization