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Article: Investigation of Crack Propagation Behaviour in Thin-Rim Gears: Experimental Tests and Numerical Simulations.

He, Haifeng / Mura, Andrea / Zhang, Taihua / Liu, Heli / Xu, Weiping

2023 Volume 16, Issue 11

Abstract: Thin-rim gears are widely used in industrial fields such as aerospace and electric vehicles due to the advantage of light weight. Yet, the root crack fracture failure of thin-rim gears significantly limits their application and further affects the ... ...

Abstract	Thin-rim gears are widely used in industrial fields such as aerospace and electric vehicles due to the advantage of light weight. Yet, the root crack fracture failure of thin-rim gears significantly limits their application and further affects the reliability and safety of high-end equipment. In this work, the root crack propagation behavior of thin-rim gears is experimentally and numerically investigated. The crack initiation position and crack propagation path for different backup ratio gears are simulated using gear finite element (FE) models. The crack initiation position is determined using the maximum gear root stress position. An extended FE method coupled with commercial software ABAQUS is used to simulate the gear root crack propagation. The simulation results are then verified by conducting experimental tests for different backup ratio gears based on a dedicated designed single-tooth bending test device.
Language	English
Publishing date	2023-05-31
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma16114095
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Reptile Search Algorithm Considering Different Flight Heights to Solve Engineering Optimization Design Problems.

Yao, Liguo / Li, Guanghui / Yuan, Panliang / Yang, Jun / Tian, Dongbin / Zhang, Taihua

Biomimetics (Basel, Switzerland)

2023 Volume 8, Issue 3

Abstract: The reptile search algorithm is an effective optimization method based on the natural laws of the biological world. By restoring and simulating the hunting process of reptiles, good optimization results can be achieved. However, due to the limitations of ...

Abstract	The reptile search algorithm is an effective optimization method based on the natural laws of the biological world. By restoring and simulating the hunting process of reptiles, good optimization results can be achieved. However, due to the limitations of natural laws, it is easy to fall into local optima during the exploration phase. Inspired by the different search fields of biological organisms with varying flight heights, this paper proposes a reptile search algorithm considering different flight heights. In the exploration phase, introducing the different flight altitude abilities of two animals, the northern goshawk and the African vulture, enables reptiles to have better search horizons, improve their global search ability, and reduce the probability of falling into local optima during the exploration phase. A novel dynamic factor (
Language	English
Publishing date	2023-07-11
Publishing country	Switzerland
Document type	Journal Article
ISSN	2313-7673
ISSN (online)	2313-7673
DOI	10.3390/biomimetics8030305
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Multi-Strategy Improved Sand Cat Swarm Optimization: Global Optimization and Feature Selection.

Yao, Liguo / Yang, Jun / Yuan, Panliang / Li, Guanghui / Lu, Yao / Zhang, Taihua

Biomimetics (Basel, Switzerland)

2023 Volume 8, Issue 6

Abstract: The sand cat is a creature suitable for living in the desert. Sand cat swarm optimization (SCSO) is a biomimetic swarm intelligence algorithm, which inspired by the lifestyle of the sand cat. Although the SCSO has achieved good optimization results, it ... ...

Abstract	The sand cat is a creature suitable for living in the desert. Sand cat swarm optimization (SCSO) is a biomimetic swarm intelligence algorithm, which inspired by the lifestyle of the sand cat. Although the SCSO has achieved good optimization results, it still has drawbacks, such as being prone to falling into local optima, low search efficiency, and limited optimization accuracy due to limitations in some innate biological conditions. To address the corresponding shortcomings, this paper proposes three improved strategies: a novel opposition-based learning strategy, a novel exploration mechanism, and a biological elimination update mechanism. Based on the original SCSO, a multi-strategy improved sand cat swarm optimization (MSCSO) is proposed. To verify the effectiveness of the proposed algorithm, the MSCSO algorithm is applied to two types of problems: global optimization and feature selection. The global optimization includes twenty non-fixed dimensional functions (Dim = 30, 100, and 500) and ten fixed dimensional functions, while feature selection comprises 24 datasets. By analyzing and comparing the mathematical and statistical results from multiple perspectives with several state-of-the-art (SOTA) algorithms, the results show that the proposed MSCSO algorithm has good optimization ability and can adapt to a wide range of optimization problems.
Language	English
Publishing date	2023-10-18
Publishing country	Switzerland
Document type	Journal Article
ISSN	2313-7673
ISSN (online)	2313-7673
DOI	10.3390/biomimetics8060492
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A Wearable Flexible Acceleration Sensor for Monitoring Human Motion.

He, Zeqing / Wang, Kuan / Zhao, Zhao / Zhang, Taihua / Li, Yuhang / Wang, Liu

Biosensors

2022 Volume 12, Issue 8

Abstract: Skin-inspired flexible wearable acceleration sensors attract much attention due to their advantages of portability, personalized and comfortable experience, and potential application in healthcare monitoring, human-machine interfaces, artificial ... ...

Abstract	Skin-inspired flexible wearable acceleration sensors attract much attention due to their advantages of portability, personalized and comfortable experience, and potential application in healthcare monitoring, human-machine interfaces, artificial intelligence, and physical sports performance evaluation. This paper presents a flexible wearable acceleration sensor for monitoring human motion by introducing the island-bridge configuration and serpentine interconnects. Compared with traditional wearable accelerometers, the flexible accelerometer proposed in this paper improves the wearing comfort while reducing the cost of the device. Simulation and experiments under bending, stretching, and torsion conditions demonstrate that the flexible performance of the flexible acceleration sensor can meet the needs of monitoring the daily movement of the human body, and it can work normally under various conditions. The measurement accuracy of the flexible acceleration sensor is verified by comparing it with the data of the commercial acceleration sensor. The flexible acceleration sensor can measure the acceleration and the angular velocity of the human body with six degrees of freedom and recognize the gesture and motion features according to the acceleration characteristics. The presented flexible accelerometers provide great potential in recognizing the motion features that are critical for healthcare monitoring and physical sports performance evaluation.
MeSH term(s)	Acceleration ; Artificial Intelligence ; Humans ; Monitoring, Physiologic ; Motion ; Movement ; Wearable Electronic Devices
Language	English
Publishing date	2022-08-10
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662125-3
ISSN	2079-6374 ; 2079-6374
ISSN (online)	2079-6374
ISSN	2079-6374
DOI	10.3390/bios12080620
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Transient Heat Conduction in the Orthotropic Model with Rectangular Heat Source.

He, Zeqing / Shi, Yingli / Shen, Yuqing / Shen, Zhigang / Zhang, Taihua / Zhao, Zhao

Micromachines

2022 Volume 13, Issue 8

Abstract: Epidermal electronic systems (EESs) are a representative achievement for utilizing the full advantages of ultra-thin, stretchable and conformal attachment of flexible electronics, and are extremely suitable for integration with human physiological ... ...

Abstract	Epidermal electronic systems (EESs) are a representative achievement for utilizing the full advantages of ultra-thin, stretchable and conformal attachment of flexible electronics, and are extremely suitable for integration with human physiological systems, especially in medical hyperthermia. The stretchable heater with stable electrical characteristics and a uniform temperature field is an irreplaceable core component. The inorganic stretchable heater has the advantage of maintaining stable electrical characteristics under tensile deformation. However, the space between the patterned electrodes that provides tensile properties causes uneven distribution of the temperature field. Aiming at improving the temperature distribution uniformity of stretchable thermotherapy electrodes, an orthotropic heat transfer substrate for stretchable heaters is proposed in this paper. An analytical model for transient heat conduction of stretchable rectangular heaters based on orthotropic transfer characteristics is established, which is validated by finite element analysis (FEA). The homogenization effect of orthotropic heat transfer characteristics on temperature distribution and its evolutionary relationship with time are investigated based on this model. This study will provide beneficial help for the temperature distribution homogenization design of stretchable heaters and the exploration of its transient heat transfer mechanism.
Language	English
Publishing date	2022-08-16
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2620864-7
ISSN	2072-666X
ISSN	2072-666X
DOI	10.3390/mi13081324
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: An Analytic Orthotropic Heat Conduction Model for the Stretchable Network Heaters.

He, Zeqing / Shi, Yingli / Nan, Jin / Shen, Zhigang / Zhang, Taihua / Zhao, Zhao

Micromachines

2022 Volume 13, Issue 7

Abstract: Compared with other physiotherapy devices, epidermal electronic systems (EES) used in medical applications such as hyperthermia have obvious advantages of conformal attachment, lightness and high efficiency. The stretchable flexible electrode is an ... ...

Abstract	Compared with other physiotherapy devices, epidermal electronic systems (EES) used in medical applications such as hyperthermia have obvious advantages of conformal attachment, lightness and high efficiency. The stretchable flexible electrode is an indispensable component. The structurally designed flexible inorganic stretchable electrode has the advantage of stable electrical properties under tensile deformation and has received enough attention. However, the space between the patterned electrodes introduced to ensure the tensile properties will inevitably lead to the uneven temperature distribution of the thermotherapy electrodes and degrade the effect of thermotherapy. It is of great practical value to study the temperature uniformity of the stretchable patterned electrode. In order to improve the uniformity of temperature distribution in the heat transfer system with stretchable electrodes, a temperature distribution manipulation strategy for orthotropic substrates is proposed in this paper. A theoretical model of the orthotropic heat transfer system based on the horseshoe-shaped mesh electrode is established. Combined with finite element analysis, the effect of the orthotropic substrate on the uniformity of temperature distribution in three types of heat source heat transfer systems is studied based on this model. The influence of the thermal conductivity ratio in different directions on the temperature distribution is studied parametrically, which will help to guide the design and fabrication of the stretchable electrode that can produce a uniform temperature distribution.
Language	English
Publishing date	2022-07-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2620864-7
ISSN	2072-666X
ISSN	2072-666X
DOI	10.3390/mi13071133
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Revealing Nanoindentation Size-Dependent Creep Behavior in a La-Based Metallic Glassy Film.

Ma, Yi / Song, Yuxuan / Zhang, Taihua

Nanomaterials (Basel, Switzerland)

2019 Volume 9, Issue 12

Abstract: We systematically studied nanoindentation size effect on creep deformation in a La-based metallic glassy film, including holding depth effect and indenter size effect. Creep displacement was mainly dependent on both holding strain and deformation volume ... ...

Abstract	We systematically studied nanoindentation size effect on creep deformation in a La-based metallic glassy film, including holding depth effect and indenter size effect. Creep displacement was mainly dependent on both holding strain and deformation volume beneath indenter. Under elastic holding, creep strain was merely holding strain-dependent. While for plastic holding, creep strain was greatly enhanced by adopting smaller indenter and/or decreasing holding depth at the same holding strain. A strong nanoindentation size effect on creep resistance was validated. Strain rate sensitivities (SRS) were calculated, which were obviously higher at elastic regions than at plastic holdings. The relationship between SRS value and creep mechanism in metallic glass was discussed.
Language	English
Publishing date	2019-12-01
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662255-5
ISSN	2079-4991
ISSN	2079-4991
DOI	10.3390/nano9121712
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: The effects of prior creep–fatigue on the strain rate sensitivity of a P92 welded joint

Song, Yuxuan / Pan, Zhouxin / Chen, Jianan / Qin, Furao / Gao, Zengliang / Zhang, Taihua / Ma, Yi

Journal of materials science. 2021 Apr., v. 56, no. 11

2021

Abstract: The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local strain rate sensitivity of strength by nanoindentation. The individual creep, fatigue and creep–fatigue loadings ... ...

Abstract	The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local strain rate sensitivity of strength by nanoindentation. The individual creep, fatigue and creep–fatigue loadings were performed to reveal the CF interaction on both the structure and mechanical properties of the welded joint. And CF loadings interrupted at lifetime fractions of 10%, 20%, 30%, 60%, 100% were adopted to acquire the high-temperature service damage evolution. The structure changes of the heterogeneous welded joint during service damage were characterized by using electron backscatter diffraction method. According to structure evolution including the changes of grain size and dislocation density during high-temperature deformation, we systematically discussed the local variation mechanism of hardness and SRS at different microstructural zones.
Keywords	X-ray diffraction ; deformation ; evolution ; hardness
Language	English
Dates of publication	2021-04
Size	p. 7111-7128.
Publishing place	Springer US
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2015305-3
ISSN	1573-4803 ; 0022-2461
ISSN (online)	1573-4803
ISSN	0022-2461
DOI	10.1007/s10853-020-05665-5
Database	NAL-Catalogue (AGRICOLA)

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Article: Room-Temperature Creep Behavior and Activation Volume of Dislocation Nucleation in a LiTaO

Ma, Yi / Huang, Xianwei / Song, Yuxuan / Hang, Wei / Zhang, Taihua

Materials (Basel, Switzerland)

2019 Volume 12, Issue 10

Abstract: The crystal orientation effect on mechanical heterogeneity of ... ...

Abstract	The crystal orientation effect on mechanical heterogeneity of LiTaO
Language	English
Publishing date	2019-05-23
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma12101683
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Revealing the Plastic Mode of Time-Dependent Deformation of a LiTaO

Zhou, Shengyun / Huang, Xianwei / Lu, Congda / Liu, Yunfeng / Zhang, Taihua / Ma, Yi

Micromachines

2020 Volume 11, Issue 9

Abstract: Recently, instrumental nanoindentation has been widely applied to detect time-dependent plastic deformation or creep behavior in numerous materials, particularly thin films and heterogeneous materials. However, deformation mechanism at nanoindentation ... ...

Abstract	Recently, instrumental nanoindentation has been widely applied to detect time-dependent plastic deformation or creep behavior in numerous materials, particularly thin films and heterogeneous materials. However, deformation mechanism at nanoindentation holding stage has not been well revealed hitherto. In the current work, nanoindentation holding tests with high loads were performed on a brittle LiTaO
Language	English
Publishing date	2020-09-21
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2620864-7
ISSN	2072-666X
ISSN	2072-666X
DOI	10.3390/mi11090878
Database	MEDical Literature Analysis and Retrieval System OnLINE

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