Article
Engineering, Mechanical
Pengfei Ying, Wentao Chen, Yulong Ge, Qing Zhou, Yong Xia
Summary: Loading measurement is crucial in mechanical tests, but existing approaches are limited to specific loading conditions. This study introduces the semi-period perturbation algorithm (SPPA) and single-mode method (SMM) for intermediate strain rate tests, showing their effectiveness in restoring loading signals.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Qiang Fu, Xu Zhao, Zhaorui Zhang, Gang Peng, Xiaohui Zeng, Ditao Niu
Summary: The dynamic splitting tensile behavior of hybrid basalt-polypropylene fiber-reinforced concrete (HBPRC) was studied, showing an increase in strength and energy dissipation capacity with higher strain rates. The effects of fiber type and content on strain rate sensitivity were consistent with dynamic dissipation energy. Additionally, the addition of basalt and polypropylene fibers improved concrete strength, with the hybrid combination showing the most significant enhancement.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Civil
Eunsoo Choi, Jongkwon Choi, Junwon Seo
Summary: This study investigated the effect of fiber content and recovery stress on the dynamic direct tensile resistances of reinforced mortar. Results showed that adding fiber content increased tensile resistances in static tests, while recovery stress enhanced post-cracking strength and reduced strain capacity. In dynamic tests, peak strength reduction was attributed to reinforced mortar sensitivity, with 1.5% fiber content specimens showing higher toughness and strain capacity compared to 1.0% fiber content specimens. Recovery stress had a greater effect on 1.0% fiber content specimens, and all resistance parameters were sensitive to strain rate, especially for the 1.5% fiber content specimens.
ENGINEERING STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
M. Ciemiorek, A. Ambroziak, K. Majchrowicz, M. Lewandowska, J. Golinski
Summary: The paper discusses the formability and ductility of ultrafine grained plates of commercial 5754 aluminium alloy under different strain rates and temperatures. A hybrid process combining multi-turn Equal Channel Angular Pressing and upset forging is proposed for the simple production of UFG sheets with high formability at elevated temperatures. Proper selection of temperature and strain rate can increase the elongations in tensile tests and the formability of UFG sheets.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Tangqing Cao, Qian Zhang, Liang Wang, Lu Wang, Yao Xiao, Jiahao Yao, Huaiyi Liu, Yang Ren, Jun Liang, Yunfei Xue, Xiaoyan Li
Summary: High-entropy alloys (HEAs) possess unique microstructures and chemical compositions, resulting in remarkable mechanical properties. In this study, the mechanical behaviors and deformation mechanisms of CoCrFeNi HEAs under dynamic loading were investigated through experiments and simulations. The results showed significant strain rate sensitivity and strain-hardening capability of CoCrFeNi HEAs at high strain rates. The findings shed light on the design and fabrication of HEAs with excellent dynamic mechanical properties.
Article
Polymer Science
Houqi Yao, Yuezhao Pang, Xin Liu, Jia Qu
Summary: The compressive responses of PVC foams with different densities were investigated under both quasi-static and high strain rate conditions. The results show that the mechanical properties of the foam materials are related to their density and are strain rate-sensitive.
Article
Construction & Building Technology
Xin Zhao, Baoping Zou, Minjia Wang, Hedong Li, Zhanyou Lou
Summary: The study showed that free water has an impact on the dynamic tensile behavior of saturated UHTCC, reducing the tensile strain rate and increasing the softening effect. Furthermore, water immersion increased the strain rate sensitivity of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Multidisciplinary
M. Abdulhakim, R. Hegazy, A. E. Abuelezz, Hany M. Abdelhakeem, A. M. Gaffer, H. M. Zakaria
Summary: This paper presents an innovative design for a multi-capacity force measurement instrument, providing an economical and simpler solution for force measurement in a large span. Through prototype fabrication and testing at the German national metrology institute, the validity of the design was confirmed, with the system capacity doubled to 20 kN and achieving class 0.5 according to ISO 376:2011 within the desired range.
Article
Mechanics
Guangping Zou, Yue Yang, Songyang Wu, Zhijun Zhang, Zhongliang Chang, Mengfu Guo
Summary: Using the experimental-simulation combination method based on the split Hopkinson tensile bar test, the fracture behavior of 2A12-T4 aluminum alloy compact tensile specimens was investigated in this study. By comparing with experimental results, the numerical approach was validated, and the influence of specimen thickness was analyzed. It was found that the J-integral curves increase exponentially with time, and specimens of different thickness exhibit similar variation patterns. With increasing thickness, the dominant factor changes from the plane stress area to the plane strain area, and the J-integral value first increases and then decreases to a constant value. The percentage of the plane strain area in the total thickness was derived.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Multidisciplinary Sciences
Lizhong Dong, Ming Ren, Yulian Wang, Guanghua Wang, Shiqin Zhang, Xulin Wei, Jianfeng He, Bo Cui, Yueran Zhao, Panpan Xu, Xiaona Wang, Jiangtao Di, Qingwen Li
Summary: This study reports an artificial neuromuscular fiber that integrates sensing and actuation capabilities, similar to a snail tentacle. By using a combination of carbon nanotube fiber core, elastomer layer, nanofiber network, and MXene/CNT thin sheath, this intelligent fiber achieves sensitive touch/stretch perception and hysteresis-free cyclic actuation tracing.
Article
Materials Science, Characterization & Testing
Junyi Zhou, Antonio Pellegrino, Vito L. Tagarielli
Summary: We propose and evaluate a new experimental technique to measure the fracture toughness of engineering materials and its sensitivity to strain rate. The method, based on a ring expansion technique, overcomes the limitations of current dynamic fracture tests and results in spatially uniform stress and strain fields prior to fracture. Experiments show an increase in material toughness with increasing strain rate.
Article
Construction & Building Technology
Vu Truong Vu, Tuan Kiet Tran, Dong Joo Kim, Duy-Liem Nguyen, Ngoc Thanh Tran
Summary: This study investigates the effects of matrix strength on the high-rate tensile resistance and strain rate sensitivity of strain-hardening fiber-reinforced concretes (SHFRCs) under direct tensile loading. The results show that high-performance concrete (HPC) has relatively lower post cracking strength but higher strain capacity at a high strain rate compared to ultra-high-performance concrete (UHPC). Furthermore, the proposed artificial neural network (ANN) model is an efficient tool for predicting the strain rate sensitivity of SHFRCs.
STRUCTURAL CONCRETE
(2023)
Article
Crystallography
Yujin Yang
Summary: The study investigated the dynamic tensile properties of CFRPs using two processes and four configurations, revealing that dynamic performance can enhance strength and modulus while reducing failure strain. Different processes exhibited similar tensile strength levels but via different fracture mechanisms, with fiber orientation also significantly affecting fracture mode. Resins and configurations were found to influence strain rate sensitivity, and an analytic model was proposed to examine this sensitivity and maximize the lightweight properties of CFRP.
Article
Materials Science, Multidisciplinary
ChoongDo Lee
Summary: This study proposes an empirical relationship between hardness and tensile strength of a busbar, and predicts the tensile strength of a bended section using different strains and strain rates. The study also confirms the impact of strain rate on the tensile properties of a pure copper plate. The empirical relationship and hardness measurement can indirectly evaluate the tensile strength and strain rate applied in the bending process of the busbar prototype.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Yifei Peng, Guohu Luo, Yongxiang Hu, Ding-Bang Xiong
Summary: The plastic deformation of metals is influenced by loading rates and nanoinclusions like graphene and carbon nanotubes have significant impact on the deformation mechanisms of metallic materials. This study provides a comprehensive understanding of the deformation behaviors of graphene/copper (Gr/Cu) submicro-laminated composites at different strain rates and temperatures. The presence of graphene inclusions enhances the deformation ability of the composites and leads to a limited decrease in strain rate sensitivity with temperature. Analysis reveals a transition from dislocation-dominated deformation to twinning-dominated deformation with increasing strain rates, facilitated by extreme loading conditions and graphene inclusions in Gr/Cu submicro-laminates.
Article
Materials Science, Multidisciplinary
Yang Li, Bin Hu, Bin Liu, Anmin Nie, Qinfen Gu, Jianfeng Wang, Qian Li
Article
Materials Science, Multidisciplinary
H. L. Cai, J. F. Wang, D. Wu, H. L. Yi
Summary: A new methodology has been developed to determine fracture strain of press-hardened steel (PHS) using interrupted bending tests and extrapolation, without direct strain measurements. The method was applied to PHS with different thicknesses and grain sizes, and compared to results from direct measurements, with an error analysis conducted to assess accuracy. This easy-to-implement method can be broadly applied to determine fracture strain for other sheet metals previously evaluated by VDA bending angle.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Engineering, Mechanical
Ao Tang, Haiting Liu, Ran Chen, Guisen Liu, Qingquan Lai, Yong Zhong, Li Wang, Jeff Wang, Qi Lu, Yao Shen
Summary: The study revealed that different volume fractions and distributions of martensite can lead to different damage modes in ferrite-martensite dual-phase steels. Through mesoscale stress and strain analysis, we identified the origins of these damage modes.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Nanoscience & Nanotechnology
Z. Wang, Z. H. Cao, J. F. Wang, M. X. Huang
Summary: During the hot stamping process of Al-Si coated press-hardened steel, the ferrite layer formed does not effectively prevent brittle cracks from propagating, leading to decreased bendability of the steel. Thinner Al-Si coating reduces coating cracks and SIF at the crack tip, improving bendability and lowering material cost.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Xiaolu Wei, Zhisong Chai, Qi Lu, Jun Hu, Zhongyi Liu, Qingquan Lai, Jianfeng Wang, Wei Xu
Summary: The newly developed PHS steel combines high strength and ductility, attributed to the nano-sized retained austenite formed through dynamic carbon partitioning. The presence of retained austenite improves the uniform and post-uniform elongation of the steel. Additionally, the addition of Si and Cr affects the formation of retained austenite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Guodong Niu, Jeff Wang, Jinping Li, Jinwen Ye, Jian Mao
Summary: In this study, a chill layer with high supersaturation was observed on the surface of Al-7Si-0.5Mg die casting tensile samples. The chill layer has fine alpha-Al grains and its formation mechanism is attributed to the pre-solidified dendrites formed in the shot sleeve and the nonuniform velocity distribution of the melt. The chill layer with solute enrichment promotes the precipitation of tiny Mg2Si phase from the supersaturated alpha-Al grains, which improves the strength and ductility simultaneously.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Multidisciplinary Sciences
Qi Lu, Qingquan Lai, Zhisong Chai, Xiaolu Wei, Xiaochuan Xiong, Hongliang Yi, Mingxin Huang, Wei Xu, Jianfeng Wang
Summary: The UniSteel concept proposes using a single chemistry to produce multiple steel grades for the automotive body-in-white, covering various applications and simplifying welding processes. It improves side-intrusion resistance and meets welding requirements, potentially revolutionizing the manufacturing of automotive BIW.
Article
Materials Science, Multidisciplinary
Zhisong Chai, Qi Lu, Jun Hu, Lingyu Wang, Zhou Wang, Jianfeng Wang, Wei Xu
Summary: This study systematically investigates the effect of retained austenite (RA) on the tensile and bending properties of a newly developed Cr and Si alloyed press hardened steel (PHS). Mechanically stable RA provides the optimal combination of tensile and bending performance, while RA with poor mechanical stability leads to a reduction in bending toughness. These findings provide useful insights for optimizing the hot stamping process of the Cr and Si-containing PHS.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zeran Hou, Wei Song, Hongliang Yi, Jianfeng Wang, Junying Min
Summary: This study investigated the performance differences of 22MnB5 steels with different coatings and initial thicknesses under plane-strain bending, with results showing that PHS with lower coating weight has a larger bending angle and fracture limit strain.
Article
Nanoscience & Nanotechnology
Zhisong Chai, Lingyu Wang, Zhou Wang, Qi Lu, Jun Hu, Wenwen Sun, Jianfeng Wang, Wei Xu
Summary: In this study, retained austenite (RA) was stabilized in press-hardened steels (PHSs) with a martensitic matrix by introducing chromium-rich carbide, which resulted in improved ductility/toughness without compromising strength.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Zhisong Chai, Qi Lu, Sarah Tedesco, Mingfeng Shi, Jason Coryell, Luke Reini, Qingquan Lai, Jianfeng Wang, Lingyu Wang, Wei Xu
Summary: CF-PHS is a novel un-coated oxidation resistant steel with superior oxidation resistance and a sub-micron oxide layer after hot stamping process. It eliminates the need for shot blasting and subsequent processes. CF-PHS has two grades with ultimate tensile strengths of approximately 1.2 and 1.7 GPa, both exceeding the corresponding Al-Si-coated PHS grades.
Editorial Material
Materials Science, Multidisciplinary
Hongyi Zhan, Guang Zeng, Qigui Wang, Congjie Wang, Pan Wang, Zhou Wang, Yiwu Xu, Devin Hess, Paul Crepeau, Jianfeng Wang
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Guodong Niu, Jianfeng Wang, Jinwen Ye, Jian Mao
Summary: Low carbon footprint aluminum structure castings are the mainstream development direction of aluminum alloys in the future. By adding Ce and TiCN nanoparticles to A356 alloys simultaneously, the mechanical properties of the alloy can be improved and the harmful effects of Fe impurity can be eliminated, which contributes to the industrialization of low carbon footprint aluminum structure castings.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qingquan Lai, Zixuan Chen, Yuntao Wei, Qi Lu, Yi Ma, Jianfeng Wang, Guohua Fan
Summary: Identifying the fracture resistance capabilities and gaining a deeper understanding of the controlling damage mechanisms are important to the development of press-hardened steels (PHS) for automotive applications. In this study, the fracture properties of a novel PHS alloyed with Cr and Si (CrSi-PHS) were assessed by using uniaxial tensile and double-edge notched tensile (DENT) tests. The results showed that CrSi-PHS presents a desirable compromise with strength and has a high fracture strain attributed to its high resistance to damage nucleation. Additionally, the fracture toughness parameters of CrSi-PHS are comparable to the multiphase AHSSs with lower strength levels.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Green & Sustainable Science & Technology
H. Zhan, L. Zhang, P. Wang, A. Hodges, Y. Zhang, J. Wang
Summary: By using post-consumer scrap, the carbon footprint of automotive grade aluminum extrusions can be significantly reduced. Guided by thermodynamics-based simulations, the iron tolerance limit for AA6082 alloy extrusion was set at 0.25%. A production trial has demonstrated a scrap utilization ratio exceeding 70% in casting. Extrusions made from the low-carbon AA6082 alloy have comparable mechanical properties to those made from 100% primary aluminum.
MATERIALS TODAY SUSTAINABILITY
(2023)