Article
Engineering, Biomedical
Jeff M. Barrett, Kayla M. Fewster, Alan C. Cudlip, Clark R. Dickerson, Jack P. Callaghan
Summary: Accurate characterization of the mechanical response of collagenous tissues is crucial for investigating soft tissue injury mechanisms. This study aimed to determine if parameters characterizing damage accumulation in a collagen-distribution model are proportional to strain rate. Results showed that the breaking function was proportional to strain rate, while Young's Modulus and failure stresses and strains remained relatively constant across different strain rates tested.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Fengchang Bu, Lei Xue, Mengyang Zhai, Xiaolin Huang, Jinyu Dong, Ning Liang, Chao Xu
Summary: This study developed a particle-velocity-based model (PVBM) to address the limitations of the moment tensor model (MTM) in acoustic emission (AE) characterization. By using PVBM as a proxy to analyze the discrepancies between MTM and experimental results, and considering the influence of various factors, the AE characteristics of rocks were reasonably and accurately obtained.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Zhoujie Gu, Rongxi Shen, Zhentang Liu, Xin Zhou, Xiaoliang Li, Zesheng Zang, Li Zhang, Wei Liu, Xi Wang
Summary: By using the split Hopkinson bar system, the mechanical behavior and energy change of coal were analyzed, and it was found that cracks were produced along the axial direction of coal samples under dynamic loading. The damage degree of coal samples intensified gradually within a certain range of strain rate. A dynamic mechanical constitutive model considering the influence of strain rate was established, and the damage changes of coal samples were analyzed.
NATURAL RESOURCES RESEARCH
(2023)
Article
Mechanics
Hongbo Zhang, Dayong Hu, Xubin Ye, Xin Chen, Yuhuai He
Summary: In this study, the dynamic mechanical properties of a new titanium alloy TC4T were investigated and a constitutive model was established. The model was validated through numerical simulations and experimental results. Additionally, FOD tests were conducted using an air gun and compared with numerical predictions, showing good agreement. Finally, the proposed constitutive model was used to predict and evaluate FOD in an aeroengine fan blade, with results indicating that initial stress had minimal influence on FOD profiles while impact position had a significant effect.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mathematics, Applied
Qinghe Shi, Kejun Hu, Lei Wang, Xiaojun Wang
Summary: This study proposes a method based on strain modal information for the identification of structural damage, and verifies its effectiveness through numerical examples and experiments. Different types of damage indexes are introduced to quantify the extent of damage and the possibility of damage.
APPLIED MATHEMATICS AND COMPUTATION
(2021)
Article
Mechanics
Xiaonan Wang, Fuji Wang, Xinghai Jin, Rao Fu, Yu Shi
Summary: A novel material failure model is developed in this study to predict the orthogonal cutting of CFRP. By considering the strain rate effect, the prediction accuracy of the model is improved. The effects of processing conditions on subsurface damage are also evaluated.
COMPOSITE STRUCTURES
(2022)
Article
Physics, Applied
Xin Yang, Han Zhao, Xuejun Gao, Zhenlin Chen, Xiangguo Zeng, Fang Wang
Summary: Spallation fracture in ductile metals with low melting points is an important topic in dynamic fracture research. In this study, classical spallation and micro-spallation simulations were conducted on single crystal and nanocrystalline tin. The results showed that grain boundary sliding predominantly affected the front width of stress wave in nanocrystalline tin. The differences in void evolution behavior between single crystal and nanocrystalline tin were mainly observed in nucleation position, spatial distribution, and growth zone.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Metallurgy & Metallurgical Engineering
Dai Bing, Shan Qi-wei, Chen Ying, Luo Xin-yao
Summary: This study investigates the effect of repeated blasting on the stability of surrounding rock during the construction of tunnels or underground engineering projects. The experiments conducted cyclic impact tests on granite samples under different axial pressures using the split Hopkinson pressure bar (SHPB). The results show that the damage characteristics of the rock change with the increase in damage value, and the dynamic peak stress of the samples exhibits a trend of increasing and then decreasing. The damage value criterion based on energy dissipation effectively characterizes the relationship between damage and the number of impacts.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Nanoscience & Nanotechnology
Peng Yin, Wei Zhang, Shen Guo, Jianbin Wen, Guodong Zhang, Fei Xue, Yanfen Zhao, Changyu Zhou
Summary: In this study, TMF tests were conducted to investigate the cyclic deformation and damage mechanisms of P92 steel under different strain rates. The results showed that increasing strain rate significantly improved fatigue life, with OP-TMF leading to more severe damage compared to IP-TMF. The presence of dynamic strain ageing (DSA) was found to be dependent on strain rate, fatigue cycle, and phase angle, affecting fatigue life in combination with fatigue cracks, creep voids, and oxidation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Mathematics, Applied
Jian-Ping Zhang, Dong Zhou
Summary: The particle-subdomain method (PSM) is introduced to study the brittle failure process of ice under uniaxial tension and compression, combining the advantages of particle-in-cell, finite element, and discrete element methods. By using this method, the strain rate effect and size effect with transition property of ice material can be naturally obtained and explained through internal fracture evolution process within the material. The method is able to simulate the complex failure behaviors of brittle ice and describe the progressive failure process with fracture evolution.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Review
Computer Science, Interdisciplinary Applications
M. Smolnicki, G. Lesiuk, Sz Duda, A. M. P. de Jesus
Summary: This article reviews different approaches to finite element analysis of fibre metal laminates based on published articles and the authors' own experiences. The interface between the metal and the composite layer is highlighted as a crucial factor in modelling fibre metal laminates. The quality of the different approaches is evaluated based on literature review and own research.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Ziyu Wang, Kaoshi Zhang, Yanqiao Song, Raneen Abd Ali, Wenliang Chen, Xingxing Wang
Summary: This study investigated the mechanical behavior and microstructure evolution of 2060 Al-Li alloy under high strain rates. The results showed that high strain rates led to increased dislocation density and grain refinement in the alloy, as well as affected the structure of grain boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Bahar Ayhan, Erol Lale
Summary: Experimental research has shown that the strength of materials increases with strain rate. However, the dynamic response of quasi-brittle materials differs significantly under tensile and compressive loading. To simulate this phenomenon, a damage plasticity model with strain rate effect is adopted. Two different equivalent strain rates are defined, one for compression and one for tension. Corrected strain rates are used to consider the retardation of damage evolution. Simulations of Split Hopkinson pressure bar (SHPB) are conducted to investigate the dynamic tensile strength of concrete specimens. The proposed model is evaluated by comparing it with experimental results. Additionally, a parametric study is conducted to examine the effects of various parameters on the dynamic increase factor, including dilatation angle, friction, specimen thickness, impulse shape, and impedance mismatch.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Construction & Building Technology
Yugui Cao, Guoxu Zhao, Muyu Liu, Qingping Jin, Zhong Tao, Cheng Jiang
Summary: Rubber concrete is gaining attention due to its environmental advantages and lightweight performance. This study investigates the effect of strain rate on the stress-strain relationship of fiber-reinforced polymer (FRP) confined rubber concrete. Experimental results show that the compressive strength of FRP confined rubber concrete increases with the strain rate and decreases with an increasing rubber replacement ratio. Analytical models are proposed to predict the lateral strain-axial strain relationship, peak strength, and peak strain of FRP confined rubber concrete considering the strain rate influence.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Kyeong-Hwan Kim, Young-Cheol Yoon, Sang-Ho Lee
Summary: This study introduces the dynamic particle difference method for analyzing tensile failure in concrete under high loading rates, overcoming limitations in material modeling. The method effectively simulates nonlinear effects in concrete and reduces computational effort.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)