Mechanics of Time-Dependent Materials最新文献_第2页

Stress relaxation behavior and mechanism of a gradient nanostructured copper processed by ultrasonic shot peening 超声喷丸处理梯度纳米结构铜的应力松弛行为及机理

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-24 DOI: 10.1007/s11043-026-09923-y

Linqing Hu, Jiabo Chen, Qianru Zhang, Qingqing Sun

{"title":"Stress relaxation behavior and mechanism of a gradient nanostructured copper processed by ultrasonic shot peening","authors":"Linqing Hu, Jiabo Chen, Qianru Zhang, Qingqing Sun","doi":"10.1007/s11043-026-09923-y","DOIUrl":"10.1007/s11043-026-09923-y","url":null,"abstract":"<div><p>In this study, the stress relaxation behavior of coarse-grained (CG) and gradient nanostructured (GNS) pure copper was systematically investigated. Stress relaxation tests revealed that the gradient nanostructure enhances resistance to time-dependent softening, as reflected by a lower normalized stress drop. Both the apparent activation volumes (<span>(V_{a})</span>) and effective activation volumes (<span>(V*)</span>) are significantly reduced, with <span>(V_{a})</span> decreasing from average 1099.1 <span>(b^{3})</span> to 315.5 <span>(b^{3})</span> and <span>(V*)</span> decreasing from average 726.2 <span>(b^{3})</span> to 199.4 <span>(b^{3})</span> for the CG and GNS samples, respectively. The reduced activation volumes suggest a transition from conventional dislocation-forest-controlled deformation toward predominantly short-range obstacle- or interface-controlled processes in the nanostructured surface layer. Further analysis reveals that the evolution of the mobile-dislocation fraction is consistent with more rapid immobilization of mobile dislocations in the GNS sample. These findings offer guidance for designing gradient architectures with improved long-term mechanical stability.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-dependent deterioration of shotcrete under accelerated calcium leaching at varying flow velocities 不同流速下钙加速浸出下喷射混凝土的时效劣化

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-24 DOI: 10.1007/s11043-026-09920-1

Jiahe Wang, Jiaxuan Wang, Yu Gao, Huajian Li

{"title":"Time-dependent deterioration of shotcrete under accelerated calcium leaching at varying flow velocities","authors":"Jiahe Wang, Jiaxuan Wang, Yu Gao, Huajian Li","doi":"10.1007/s11043-026-09920-1","DOIUrl":"10.1007/s11043-026-09920-1","url":null,"abstract":"<div><p>Understanding the deterioration of shotcrete exposed to flowing water is essential for improving the durability of tunnel support structures. This work investigated the effects of alkali-free accelerator dosage, flow velocity, and curing duration on shotcrete deterioration using accelerated leaching tests in 6 mol/L ammonium chloride solution. Accelerator dosages of 0–8%, flow velocities of 0–2 m/s, and curing durations of 7–28 days were examined. Compressive strength, mass loss, and apparent leaching depth were measured, while low-field nuclear magnetic resonance, X-ray diffraction, and backscattered electron imaging with energy-dispersive X-ray spectroscopy characterized changes in pore structure, phase composition, and calcium distribution. Exposure increased porosity, particularly within the 0.01–0.1 μm pore-size range, and depleted calcium-bearing phases in the affected regions. Flow velocity induced the largest deterioration changes within the investigated ranges. For specimens containing 8% accelerator and cured for 28 days, increasing flow velocity from 0 to 2 m/s increased compressive strength loss from 69.3% to 91.7%, mass loss from 1.5% to 8.2%, and apparent leaching depth from 6.8 mm to at least 15 mm after 28 days of exposure. Higher accelerator dosages and shorter curing durations also intensified deterioration, consistent with their greater initial porosity and less compact microstructures. The findings support a mechanism in which flowing solution promotes calcium removal, while dissolution of calcium-bearing phases increases porosity and weakens the cementitious skeleton. Under the accelerated conditions investigated, controlling accelerator dosage, reducing flow velocity, and extending curing before exposure mitigated deterioration.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development, characterization, and multi-response optimization of waste cooking oil and rice husk ash modified bio-bitumen under unaged and short-term aged conditions 废食用油和稻壳灰改性生物沥青的研制、表征及多响应优化

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-24 DOI: 10.1007/s11043-026-09922-z

Sanjeev Kumar, Sanjeev Kumar Suman, Homendra Singh

{"title":"Development, characterization, and multi-response optimization of waste cooking oil and rice husk ash modified bio-bitumen under unaged and short-term aged conditions","authors":"Sanjeev Kumar, Sanjeev Kumar Suman, Homendra Singh","doi":"10.1007/s11043-026-09922-z","DOIUrl":"10.1007/s11043-026-09922-z","url":null,"abstract":"<div><p>The increasing demand for sustainable pavement materials has promoted the use of waste-derived modifiers as partial alternatives to conventional petroleum bitumen. This study investigates the effects of waste cooking oil (WCO) and rice husk ash (RHA) on the physical, rheological, temperature-susceptibility, temperature-sensitivity, chemical, and workability characteristics of VG-30 bitumen. Waste cooking oil-modified bio-bitumen (WCOMBB) was prepared using 5–15% WCO, while rice husk ash-modified bio-bitumen (RHAMBB) was prepared using 3–9% RHA by weight of base binder. Conventional binder tests, viscosity analysis, mixing and compaction temperature evaluation, activation energy analysis, Dynamic Shear Rheometer (DSR)-based frequency sweep, master curve analysis, Fourier transform infrared spectroscopy (FTIR), and Grey Relational Analysis (GRA) were conducted under unaged and short-term-aged conditions. The results showed that WCO significantly softened the binder by increasing penetration up to 307.9% and reducing absolute viscosity up to 83.1%, thereby improving workability and reducing processing temperatures. In contrast, RHA improved binder stiffness by reducing penetration up to 57.1% and increasing viscosity up to 19.8%, indicating better thermal stability and high-temperature consistency. Rheological results showed that WCOMBB-10% exhibited improved flexibility, whereas RHAMBB-9% showed enhanced stiffness and rutting-related response. FTIR indices indicated physical blending for WCOMBBs and filler reinforcement for RHAMBBs without major new chemical bond formation. GRA identified 15% WCO and 9% RHA as the best-ranked dosages within the selected binder-level criteria. Overall, WCO is promising for warm-mix applications, while RHA is suitable for high-temperature binder improvement.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of bedding angle and specimen geometry on the failure of layered rocks 层理角度和试样几何形状对层状岩石破坏的影响

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-23 DOI: 10.1007/s11043-026-09913-0

Yujie Shen, Yingxian Lang, Zhuo Dong

{"title":"Effects of bedding angle and specimen geometry on the failure of layered rocks","authors":"Yujie Shen, Yingxian Lang, Zhuo Dong","doi":"10.1007/s11043-026-09913-0","DOIUrl":"10.1007/s11043-026-09913-0","url":null,"abstract":"<div><p>Layered rocks exhibit pronounced mechanical anisotropy, and their mechanical response depends on specimen geometry. This work investigates the effects of bedding angle and height-to-diameter ratio on the mechanical response, fracture morphology, and crack evolution of layered rocks. Experimental characterization combined uniaxial compression tests with three-dimensional fractography, while numerical simulations utilized two-dimensional discrete-element method. Specimens with bedding angles of 0°, 30°, 60°, and 90° were tested, and the resulting fracture surfaces were evaluated using fractal dimension, joint roughness coefficient, and statistical morphological descriptors. Numerical models incorporating random bedding distributions were developed for height-to-diameter ratios of 0.5, 1.0, 2.0, and 3.0. The results show that bedding orientation governs compressive strength, elastic modulus, failure mode, and fracture-surface morphology. Compressive strength exhibits a U-shaped dependence on bedding angle, while both compressive strength and elastic modulus generally decrease as the height-to-diameter ratio increases. Fracture surfaces formed at bedding angles of 0° and 30° are relatively rough and geometrically complex, whereas those formed at 60° and 90° are smoother because failure is increasingly controlled by bedding-parallel slip or separation. Increasing the height-to-diameter ratio reduces end-constraint effects, promotes shear-crack development and damage localization, and enhances the continuity of the principal failure zone. These findings clarify the coupled effects of bedding anisotropy and specimen geometry on the failure behavior of layered rocks and provide a basis for evaluating the stability of layered rock masses.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient hoop-stress relocation and inverse identification in radially graded viscoelastic cylinders with independent bulk and shear relaxation spectra 具有独立体松弛谱和剪切松弛谱的径向梯度粘弹性圆柱体瞬态环应力重定位与反识别

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-23 DOI: 10.1007/s11043-026-09919-8

Ahmet Çalık

{"title":"Transient hoop-stress relocation and inverse identification in radially graded viscoelastic cylinders with independent bulk and shear relaxation spectra","authors":"Ahmet Çalık","doi":"10.1007/s11043-026-09919-8","DOIUrl":"10.1007/s11043-026-09919-8","url":null,"abstract":"<div><p>Bulk and shear relaxation functions need not have proportional time dependence. This study develops a quasi-static framework for pressurized, radially graded viscoelastic cylinders in which the two spectra are specified separately. A generalized-plane-strain formulation uses radial displacement, radial stress, and an axial-force integral as state variables, avoiding radial derivatives of the material functions. The transformed problem is solved by the complementary functions method and verified against an independent time-domain finite-element model. The examples show that spatial variation in relaxation times can temporarily change which wall governs the maximum hoop stress. This behaviour reflects competition between stress maxima rather than continuous motion of a single peak. Cross-solver identification tests use outer-surface displacement and axial strain. Repeated-noise tests show that the reduced model can retain useful response predictions as measurement noise increases, although individual material parameters become substantially less precise. Adding radial-profile coefficients worsens conditioning and can prevent convergence under the same measurement and optimization protocol. A separate Gaver–Stehfest audit identifies sensitivity to transform-sample errors and reduced accuracy near a pressure-ramp corner. A material-informed epoxy example illustrates the errors caused by proportional bulk–shear approximations. These results support numerical analysis and experiment design, but not unrestricted parameter recovery or laboratory validation. Axial measurements must be interpreted as gauge averages, and the opposing radial gradients used in the examples remain hypothetical material profiles.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A three-parameter Weibull damage constitutive model for fiber concrete artificial dams in coal mine underground reservoirs 煤矿地下水库纤维混凝土人工坝三参数Weibull损伤本构模型

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-22 DOI: 10.1007/s11043-026-09912-1

Tenglong Rong, Yilu Yang, Wen Wang, Lujun Wang, Yihe Yu, Pengfei Nan, Ruixin Niu, Keke Cong

{"title":"A three-parameter Weibull damage constitutive model for fiber concrete artificial dams in coal mine underground reservoirs","authors":"Tenglong Rong, Yilu Yang, Wen Wang, Lujun Wang, Yihe Yu, Pengfei Nan, Ruixin Niu, Keke Cong","doi":"10.1007/s11043-026-09912-1","DOIUrl":"10.1007/s11043-026-09912-1","url":null,"abstract":"<div><p>Ordinary concrete is characterized by high brittleness and poor crack resistance. The structural reliability of concrete artificial dam in coal mine underground reservoirs (CMUR) under complex conditions cannot be ensured by traditional concrete. Fiber concrete is utilized in the construction of artificial dam in the CMUR is characterized by excellent toughness and crack resistance. In order to investigate the mechanical properties and the damage accrual process of fiber concrete artificial dam under imposed stressing, a damage model for fiber concrete artificial dam in underground coal mine reservoir is proposed. The damage model can present the characteristics of multi-phase component synergistic load-bearing in the fiber concrete matrix-fiber-interfacial transition zone (ITZ) and the random distribution direction of fibers. Meawhile, the damage model is proposed on the basis of statistical damage mechanics, characterized by a three-parameter Weibull distribution. Moreover, the damage model is validated by the experimental results of fiber concrete under uniaxial and triaxial compression. A sensitivity analysis of the Weibull distribution parameters is conducted to examine the influence on the mechanical response and damage evolution in the fiber concrete artificial dam. Additionally, parametric analyses are performed to explore the impacts of fiber orientation intensity, ITZ thickness, and ITZ stiffness on the elastic response of fiber concrete. The research results serve as a theoretical foundation for the design of the fiber concrete artificial dam in the CMUR.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear creep constitutive model of sandstone under stepped cyclic-constant loading 阶梯循环恒载作用下砂岩的非线性蠕变本构模型

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-18 DOI: 10.1007/s11043-026-09915-y

Quanle Zou, Ke Xu, Chunmei Chen, Jinyan Liang, Yanchi Liu, Feixiang Lv, Xiaoyan Sun, Yulin Hu

{"title":"Nonlinear creep constitutive model of sandstone under stepped cyclic-constant loading","authors":"Quanle Zou, Ke Xu, Chunmei Chen, Jinyan Liang, Yanchi Liu, Feixiang Lv, Xiaoyan Sun, Yulin Hu","doi":"10.1007/s11043-026-09915-y","DOIUrl":"10.1007/s11043-026-09915-y","url":null,"abstract":"<div><p>The overlying strata of coal seams are subjected to stepped cyclic-constant loads induced by mining and stopping operations. Nevertheless, the damage accumulation characteristics of rock under this type of stress path and how to consider the effect of prior cyclic loading in constitutive models remain unresolved issues requiring further deliberation. Accordingly, conventional triaxial loading tests and stepped loading tests were carried out in this study to clarify damage evolution characteristics of sandstone under stepped cyclic-constant loading. The results show that upon stress sudden change, the sudden variations of elastic modulus and residual strain gradually decrease, while that of energy dissipation ratio increases continuously. The damage effect is prominent in the cyclic loading stage at <span>(0.7sim 0.9sigma _{mathrm{max}})</span>, manifested as an overall increase in residual strain. The differences in damage accumulated from the cyclic disturbance stress history exert an influence on the mechanical response in the creep stage, and all sandstone specimens eventually exhibit accelerated creep characteristics as they approach failure. The Non-Viscous Plastic-Bending (NVPB) body and stress history influence factor <span>(H_{mathrm{t}})</span> are introduced on the basis of the classical Nishihara model to characterize the nonlinear deformation feature in the accelerated creep stage and the strain accumulation effect induced by prior loading history, respectively. The determination coefficients <span>(mathrm{R}^{2})</span> for the final creep stage and the whole creep stage exceed 91% and 96%, respectively, which verifies the applicability of the improved model. The research results can provide new insights for the stability analysis of overlying strata of coal seams.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148987021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-cycle fatigue behavior of an additively manufactured Inconel-type Ni-based superalloy at 900 °C 一种增材制造inconel型镍基高温合金在900℃下的高周疲劳行为

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-09-16 DOI: 10.1007/s11043-026-09917-w

Huan Wang, Daijian Wu, Guozheng Quan

{"title":"High-cycle fatigue behavior of an additively manufactured Inconel-type Ni-based superalloy at 900 °C","authors":"Huan Wang, Daijian Wu, Guozheng Quan","doi":"10.1007/s11043-026-09917-w","DOIUrl":"10.1007/s11043-026-09917-w","url":null,"abstract":"<div><p>This paper investigates the high-cycle fatigue behavior of an additively manufactured Inconel-type Ni-based superalloy, GH3625, at 900 °C. Stress-life responses were measured for specimens with different build orientations, and the fatigue mechanisms were examined using transmission electron microscopy, electron backscatter diffraction, and fracture-surface analysis. The results show that the fatigue performance is orientation dependent. At 900 °C and a stress ratio of 0.1, the transverse specimens exhibit a higher fatigue limit than the longitudinal specimens. Under high stress levels, fatigue failure is associated with low dislocation density, limited dislocation interaction, and rapid crack propagation. Under lower stress levels, a higher dislocation density and more developed dislocation structures help suppress crack initiation and extend fatigue life. EBSD results further indicate that fatigue life is influenced by grain orientation distribution, grain size, and the fraction of low-strain grains. A higher fraction of fine, low-strain grains improves resistance to fatigue crack initiation. Fracture observations support these mechanisms, showing rougher fracture surfaces for high-stress specimens and flatter surfaces with slower crack growth for low-stress specimens. These findings clarify the microstructural factors that control the high-temperature high-cycle fatigue behavior of additively manufactured GH3625 superalloy.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 4","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Modeling mineral-composition-dependent creep in composite salt rock 修正：模拟复合盐岩中依赖矿物成分的蠕变

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-08-27 DOI: 10.1007/s11043-026-09907-y

Zhe Zhang, Chuanliang Yan, Yuanfang Cheng, Mingyu Xue, Zhongying Han

引用次数: 0

Experimental investigation of the flexural performance of concrete slabs reinforced with recycled metallic fibers and polypropylene grids 再生金属纤维加聚丙烯格网混凝土板抗弯性能试验研究

IF 4.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2026-08-24 DOI: 10.1007/s11043-026-09899-9

Djamal Atlaoui, Samir Tiachacht, Samir Khatir, Youcef Bouafia, Abdelwahhab Khatir, Thanh Cuong-Le

{"title":"Experimental investigation of the flexural performance of concrete slabs reinforced with recycled metallic fibers and polypropylene grids","authors":"Djamal Atlaoui, Samir Tiachacht, Samir Khatir, Youcef Bouafia, Abdelwahhab Khatir, Thanh Cuong-Le","doi":"10.1007/s11043-026-09899-9","DOIUrl":"10.1007/s11043-026-09899-9","url":null,"abstract":"<div><p>This experimental study evaluates the influence of recycled metallic fibers (MF) from steel machining waste and polypropylene grids (PPG) on the flexural behavior of concrete slabs. The metallic fibers are randomly dispersed throughout the concrete, while the PPG grids (with fine and large meshes) are positioned through the slab thickness. Three-point bending tests were conducted on slabs measuring 250 × 500 × 70 mm. Results show that metallic fibers at a fiber content of 0.8% significantly improve both the ultimate strength and ductility. The average ultimate load of slabs with this fiber content of 0.8% (W<span>(_{mathrm{f}} = 0.8)</span>%) reaches 17.21 kN, representing an increase of 24% compared to the control slabs without fibers (Fr = 13.91 kN). These slabs exhibit ductile behavior, in contrast to slabs reinforced with PPG grids, which undergo brittle failure despite an increase in mid-span deflection of approximately 25.6%. A comparison with the literature indicates that using recycled metallic fibers at 0.8% yields higher load capacity and stiffness than a hybrid steel-rubber fiber mixture. This study highlights the potential of recycled metallic fibers to sustainably enhance the mechanical performance of concrete while promoting industrial waste recycling.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"30 3","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0