Applications in engineering science最新文献

{"title":"Study on influence of initial deviation on motion attitude of spacecraft","authors":"Jian Wang ,&nbsp;Chunlei Jiang ,&nbsp;Guanglin Li ,&nbsp;Dongjian Su ,&nbsp;Hao Wang ,&nbsp;Ruyi Tao","doi":"10.1016/j.apples.2025.100281","DOIUrl":"10.1016/j.apples.2025.100281","url":null,"abstract":"<div><div>Deployable spacecraft have been widely used, while the motion state under the disturbance is still unknown. A test device is designed to simulate the motion of deployable spacecraft in this paper, and the ballistic characteristics of solid thruster are tested. The test results show that the total impulse deviation of the solid thruster can be effectively reduced by controlling the propellant mass, but the spacecraft would still produce a large precession angle and precession angular rate. The influence of launch disturbance and deployment disturbance on the spacecraft is larger than that of spinning thruster deviation. The ratio between the transverse moment of inertia and the axial moment of inertia should be increased as much as possible during the design of the spacecraft, otherwise a small disturbance would produce a large precession angle. The test results have certain reference significance for the study of the spacecraft micro-motion.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100281"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on thermo-mechanical coupled damage of high-temperature concrete based on close-packed model","authors":"Yi-Da Zhao,&nbsp;Xiao-Hui Liu,&nbsp;Zheng-Lin Lan,&nbsp;Zhong-Wei Yao","doi":"10.1016/j.apples.2026.100296","DOIUrl":"10.1016/j.apples.2026.100296","url":null,"abstract":"<div><div>This study employs ABAQUS numerical simulations to compare a model incorporating aggregates with a homogeneous model without aggregates. This comparison reveals the mechanical properties and micro-damage characteristics of concrete after exposure to high temperatures. The study systematically elucidates the intrinsic degradation mechanisms of concrete under thermo-mechanical coupling, spanning from macro to micro scales. It also highlights the advantages of the proposed close-packed model. The findings indicate that both peak stress and elastic modulus exhibit nonlinear reductions as temperature increases in high-temperature concrete. Stress-strain variation patterns demonstrate similarities across both models. The close-packed model effectively represents the mesoscale damage characteristics of high-temperature concrete. High temperatures significantly lower the stress threshold for damage initiation, and the damage evolution gradually slows down. The damage transitions from localized expansion at the aggregate-matrix interface to a globally diffuse expansion. Furthermore, the close-packed model effectively captures the settlement and packing characteristics of aggregates during the actual pouring process, addressing homogeneous models and random aggregate models that overlook physical processes.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100296"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linearized instability of Couette flow in stress-power law fluids","authors":"Krishna Kaushik Yanamundra ,&nbsp;Lorenzo Fusi","doi":"10.1016/j.apples.2026.100304","DOIUrl":"10.1016/j.apples.2026.100304","url":null,"abstract":"<div><div>This paper examines the linearized stability of plane Couette flow for stress-power law fluids, which exhibit non-monotonic stress–strain rate behavior. The constitutive model is derived from a thermodynamic framework using a non-convex rate of dissipation potential. Under velocity boundary conditions, the system may admit three steady-state solutions. Linearized stability analysis reveals that the two solutions on ascending constitutive branches are unconditionally stable, while the solution on the descending branch is unconditionally unstable. For mixed traction-velocity boundary conditions, the base state is unique. Stability depends solely on whether the prescribed traction lies on an ascending (stable) or descending (unstable) branch of the constitutive curve. The results demonstrate that flow stability in these complex fluids is fundamentally governed by both boundary conditions and constitutive non-monotonicity.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100304"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new implementation of the anisotropic plasticity–ductile damage model coupling Hill yield and GTN failure criteria in Abaqus UMAT: Identification of parameters for AA6022","authors":"Md. Zahidul Sarkar ,&nbsp;Somnath Ghosh ,&nbsp;Marko Knezevic","doi":"10.1016/j.apples.2026.100311","DOIUrl":"10.1016/j.apples.2026.100311","url":null,"abstract":"<div><div>This paper adopts a 2D implementation of an anisotropic plasticity–ductile damage model coupling Hill yield and GTN failure criteria and extends it to a 3D implementation in a user material subroutine (UMAT) of Abaqus software. The implementation is first verified via comparisons with an isotropic model coupling von Mises yield and GTN failure criteria available in Abaqus. Next, a deep drawing of a cylindrical cup simulation from an aluminum alloy (AA) 6022-T4 orthotropic sheet is carried out using the developed anisotropic plasticity–ductile damage model to predict geometrical shape changes including the earing profile and sheet thinning/thickening as well as the structural punch force-displacement response. Parameters pertaining to the anisotropy are identified using simulations involving a polycrystal plasticity model calibrated for the alloy in prior works, while the flow curve was appropriately extrapolated to large strains to facilitate the simulation. Finally, an expansion of a circular hole at the bottom of a cylindrical cup simulation is performed from the same sheet alloy to predict anisotropy as well as the evolution of damage and failure during the expansion. Despite the axisymmetry of the hole expansion simulation set-up, non-uniform thinning is successfully predicted around the hole throughout the expansion owing to the anisotropy of the material in addition to the structural punch force-displacement behavior. The damage and void volume fraction evolution parameters are optimized to successfully predict the rate and spatial location of the failure during the expansion. The developed anisotropic plasticity – ductile damage simulation framework can be used to predict with acceptable accuracy phenomena pertaining to the material behavior, resulting geometrical changes, and damage important for the optimization of industrial metal forming processes. The practical significance of the model for industrial simulations is emphasized given its computational efficiency. Numerical aspects of the model implementation along with the simulation results are presented and discussed.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100311"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147419629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A variant of Stokes’ second problem for a new shear thinning model for paint","authors":"Mohan Anand,&nbsp;Banothu Gnaneshwarii","doi":"10.1016/j.apples.2025.100288","DOIUrl":"10.1016/j.apples.2025.100288","url":null,"abstract":"<div><div>A variant of Stokes’ second problem, namely the flow of a pool of liquid between two plates with the bottom plate oscillating, is studied for a novel shear thinning fluid model for paint. The governing equation is obtained using the semi-inverse approach. The governing equation is solved numerically, subject to the appropriate initial and boundary conditions. The cases of bottom plate subject to oscillatory velocity and oscillatory shear stress are studied. The results are qualitatively similar: the fluid damps the oscillations and introduces a phase shift, the extent of each depending on the distance from the plate. A parameter study is conducted for the case of the bottom plate being subject to oscillatory velocity. Increasing the amplitude of oscillations increases the maximum velocity close to the plate, but the effect diminishes with increasing amplitude. On the other hand, increasing the frequency decreases the maximum velocity close to the plate. The effect of the material parameters of paint on the maximum velocity close to the plate, although counterintuitive, matches what is expected for shear thinning fluids.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100288"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of climate variability on optimal thickness of wall insulation: A numerical study across five cold cities using long-term numerical simulations","authors":"Husniddin Khayrullaev ,&nbsp;Andicha Zain ,&nbsp;Issa Omle ,&nbsp;Endre Kovács","doi":"10.1016/j.apples.2026.100294","DOIUrl":"10.1016/j.apples.2026.100294","url":null,"abstract":"<div><div>In cold climates, winter heat loss through building walls significantly impacts energy consumption. Several previous experiments showed that while simple steady-state methods such as the Degree-Days approach are often used for estimation, they lack accuracy in capturing transient effects. In this paper, we employ a numerical transient simulation method to evaluate heat transfer through the southern and northern wall in five cold cities over the six-month heating season. Temperature profiles and heat loss are analyzed for both uninsulated and insulated walls using glass wool with varying thicknesses. The optimal insulation thickness is determined by assessing thermal performance across different scenarios. The results will help determine how to increase energy and financial efficiency at the same time in cold climates. As a result, it was found that for the south wall, the optimum insulation thicknesses are (33, 25, 30, 32, and 26 cm), and the life cycle energy savings are (564.56, 300.12, 448.01, 516.41, and 302.38 Euros per square meter) for the cities of Ulaanbaatar, Copenhagen, Edmonton, Hokkaido, and Warsaw, respectively, while the payback time are (1.79, 2.71, 2.09, 1.92, and 2.75 years).</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"25 ","pages":"Article 100294"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of fibre-reinforced composites for lightweight ballistic body armour","authors":"Elias Wakshume ,&nbsp;Semayat Fanta ,&nbsp;Solomon Seid ,&nbsp;Kumlachew Yeneneh","doi":"10.1016/j.apples.2025.100262","DOIUrl":"10.1016/j.apples.2025.100262","url":null,"abstract":"<div><div>This study presents an innovative approach to optimizing fiber-reinforced composite materials for ballistic body armor, enhancing protection against 7.62 mm AK-47 rifle bullets. Through finite element analysis (FEA), the mechanical responses of Kevlar/alumina and Dyneema/epoxy composites were investigated under ballistic impact conditions. FEA results indicate that Dyneema/epoxy could provide a significant reduction in areal density (≈56.9 %) and an improved energy-absorption capacity (≈55.1 %) relative to the Kevlar/alumina system considered here; these values are derived from numerical simulations validated against literature data and should be confirmed with targeted ballistic experiments. The novelty of this research lies in the comparative investigation and optimization of next-generation lightweight composite systems, including Dyneema/epoxy, Kevlar/alumina vests used by Ethiopian military forces. This is one of the first studies to integrate finite element simulations, and damage mechanics (Hashin criteria) to quantify the ballistic performance of these advanced composites under real-world threat levels. Moreover, this research introduces a new paradigm in ballistic armor design by systematically correlating weight efficiency, damage resilience, and stress–strain behavior in multi-layered composite laminates. The study highlights the cost-effectiveness and potential of Dyneema/epoxy to redefine ballistic protection by balancing weight, efficiency, durability, and impact resistance. These findings establish Dyneema/epoxy as a next-generation material for advanced body armor applications.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"24 ","pages":"Article 100262"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a 3D-printed shell lattice midsole for diabetic foot shoe","authors":"Mireia Puig-Poch ,&nbsp;Anna Hössinger-Kalteis ,&nbsp;Michael Lackner ,&nbsp;Zoltan Major ,&nbsp;Sara Ruiz-Martorell","doi":"10.1016/j.apples.2025.100271","DOIUrl":"10.1016/j.apples.2025.100271","url":null,"abstract":"<div><div>This study aims to support diabetic foot treatment by introducing a customized offloading midsole specifically designed for neuropathic ulcers, one of the most common complications of diabetes. The goal is to explore a personalized, mechanically efficient, and low-cost solution that ensures optimal redistribution of plantar pressure.</div><div>A parametric design methodology based on sinusoidal shell lattice structures is developed. These geometries allow for structural adaptation by adjusting key design variables such as amplitude, cut out radius, and shell thickness. Finite element simulations are used to assess the mechanical behaviour of multiple cell configurations, followed by experimental validation using FDM 3D-printed samples. A prototype midsole is produced by mapping a distribution of variable-thickness cells onto an idealized plantar pressure pattern. Its mechanical performance is evaluated through compression testing using a foot-shaped stamp.</div><div>Results confirm the feasibility of achieving zoned stiffness distribution through additive manufacturing. The selected final configuration strikes a balance between structural integrity and deformability. Simulated results closely match experimental data, supporting the viability of the method for developing offload-sensitive midsoles. Unlike traditional foam-based designs, this approach enables a more continuous and precise modulation of mechanical response across the plantar surface.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"24 ","pages":"Article 100271"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of fly ash and ground bottom ash from thermal power plants on workability, compressive strength and durability of high performance fine-grained concrete","authors":"Thanh Ha Le ,&nbsp;Dinh Loc Mai ,&nbsp;Thi Hue Ta","doi":"10.1016/j.apples.2025.100261","DOIUrl":"10.1016/j.apples.2025.100261","url":null,"abstract":"<div><div>This paper presents the effects of fly ash (FA) and ground bottom ash (BA) on the workability, compressive strength, sulfate resistance and resistance to Chloride ion penetration of high performance fine-grained concrete. The bottom ash was ground in a ball mill for 90 min. Cement was partially replaced with FA/ BA at replacement levels of 10 %, 20 %, and 30 % by weight. The experimental results indicate that increasing the FA content improved the workability of the concrete while reducing the required amount of superplasticizer. In contrast, increasing the BA content decreased workability, necessitating a higher dosage of superplasticizer. Concrete incorporating BA exhibited higher compressive strength than the control mix (100 % cement), with BA being more effective than FA in enhancing strength. Additionally, concrete containing FA/ BA demonstrated greater sulfate resistance and resistance to Chloride ion penetration compared to the control mix. Higher replacement levels of FA/ BA led to further improvements in sulfate resistance and resistance to Chloride ion penetration, with BA showing more pronounced effects than FA.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"24 ","pages":"Article 100261"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal imagery temperature gradient analysis through deformable transformer residual regression network for crack severity estimation","authors":"Shyamala Devi M ,&nbsp;Yuvaraj Natarajan ,&nbsp;Sri Preethaa K․R ,&nbsp;Priya S","doi":"10.1016/j.apples.2025.100265","DOIUrl":"10.1016/j.apples.2025.100265","url":null,"abstract":"<div><div>Structural crack severity estimation is critical for preventive maintenance, yet conventional approaches often fall short in capturing subsurface defects from thermal imagery due to noise and irrelevant metadata. This paper proposes a novel Vision Deformable Transformer Normalized Residual Regression Network (ViTNResNet18) for temperature gradient analysis and crack severity estimation. The thermal crack images used in this work are sourced from Mendeley Crack900 dataset. The ViTNResNet18 begins by automatically cropping to eliminate FLIR logos and temperature scales, ensuring focus on relevant thermal data. The novelty of the model is Gradient Thermal Filtering (GTF) that combines gradient magnitude, direction, thermal flow, Gabor frequency, and thermal clusters into a unified fused image to enhance crack feature representation. Subsequently, a Heat Dispersion Profile (HDP) is generated to extract critical thermal texture and gradient descriptors. The core ViTNResNet18 replaces standard ResNet18 blocks with Normalized Residual Blocks (NRB) to stabilize local feature extraction, while a ViT Convolutional Neural Network (CNN) fusion module is introduced after average pooling to capture global thermal dependencies. Unlike conventional ViT models, the proposed ViTNResNet18 replaces fixed linear projections with an offset predictor Multi-Layer Perceptron (MLP) and Deformable Positional Embedding (DPE), allowing adaptive focus on temperature gradient variations. The extracted heat dispersion profile is embedded along with transformer features and passed through an MLP regression head to directly estimate crack width and depth. Experimental results demonstrate that the proposed method achieves crack severity prediction accuracy of 99.60 %, significantly outperforming traditional models. The ViTNResNet18 delivers an intelligent and scalable solution for structural crack severity estimation by improving the accuracy of defect detection and quantification contributing to resilient infrastructure.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"24 ","pages":"Article 100265"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}