Lixiang Dang¹, Yanwen Zeng¹, Wei Duan^1,*, Yan Zhang¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.012173

Abstract In order to regulate the multi-scale structure of Ti-6Al-4V formed by the SLM (selective laser melting) process, this study uses the method of combining numerical simulations with experiments to investigate the effects of SLM process parameters on the phase composition, micro- and meso-structures, and their distribution of Ti-6Al-4V. The study shows that the SLM-formed Ti-6Al-4V is mainly composed of α/α' phases. Horizontally, the specimens at a 0° phase angle mainly show a striped pattern, while the specimens at 67° and 90° phase angles will show a tessellated pattern. Vertically, the specimens at 0°, 67°, and More >

Fangye Liu^1,#, Jiaping Qu^1,#, Yajun Li¹, Jiawei Fan¹, Yumeng Cui¹, Jingwen Wu¹, Xueqi Gu¹, Xia Li^2,*, He Huang^1,*

Phyton-International Journal of Experimental Botany, Vol.93, No.7, pp. 1599-1621, 2024, DOI:10.32604/phyton.2024.051386 - 30 July 2024

Abstract Chrysanthemum × morifolium is a horticultural crop which plays a vital role in the flower industry with significant economic value and has a cultivation history of over three thousand years in China. The accumulation of anthocyanins is always affected by light. Here, we revealed that anthocyanin accumulation is highly dependent on light in ‘2021135’ genotype chrysanthemum, while it is light-independent in ‘2001402’ genotype chrysanthemum. However, no literature has been reported regarding the non-photosensitive chrysanthemum in anthocyanins light-independent synthesis pathways. Through the phenotype analysis of 44 F generations, we found that light-independence is a dominant trait which… More >

Yun Lei^1,2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.12, pp. 3021-3032, 2023, DOI:10.32604/fdmp.2023.029570 - 27 October 2023

Abstract The highly inefficient simultaneous extraction of coal and gas from low-permeability and high-gas coal seams in deep mines is a major problem often restricting the sustainable development of coal industry. A possible way to solve this problem under deep and complex geological conditions is represented by the technology based on the phase-change induced explosion of liquid carbon dioxide. In this work, the mechanism of formation of the coal mass fracture circle resulting from the gas cracking process is theoretically analyzed. Numerical simulations show that a blasting crushing zone with a radius of 1.0 m is More >

Heping Hou¹, Yang Yue^1,*, Jian Liu¹, Darun Xi², Shanhui Liu¹

Journal of Renewable Materials, Vol.11, No.1, pp. 273-289, 2023, DOI:10.32604/jrm.2023.021167 - 10 August 2022

Abstract Environmental contamination has been caused by petroleum-based polymeric materials in the melt deposition process. Nowadays biodegradable materials have been widely used in the fused deposition modeling (FDM) industry, such as polylactic acid (PLA). However, internal complex thermal stress and deformations in part caused by an uneven distribution of PLA filament deposition temperatures during FDM, which will seriously affect the geometric accuracy of the printed part. In order to reduce material waste and environmental pollution during the printing process, the accuracy of PLA part can be improved. Herein, numerical simulation was carried out to investigate the… More >

Bo Chen¹, Bo Liu^2,*, Yong Chao³, Chao Zhong¹

Journal of Renewable Materials, Vol.10, No.12, pp. 3491-3504, 2022, DOI:10.32604/jrm.2022.021302 - 14 July 2022

Abstract The formation process of aromatic hydrocarbon tar during the pyrolysis process of biomass components of cellulose and lignin was carried out by quantum chemical calculation based on density functional theory method B3LYP/6-31G++(d, p). 5-Hydroxymethylfurfural was chosen as the model compound of cellulose and hemicellulose, and syringaldehyde was chosen as the model compound of lignin. The calculation results show that the formation process of cellulose monocyclic aromatic hydrocarbon tar is the conversion process of benzene ring from furan ring, and the highest reaction energy barrier appears in the process of decarbonylation, which is 370.8 kJ/mol. The… More >

Wei Zhang^*

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.4, pp. 1153-1167, 2022, DOI:10.32604/fdmp.2022.019719 - 06 April 2022

Abstract Magnetic induction-free abrasive wire sawing (MIFAWS) is a method that combines magnetic fields with traditional free abrasive wire sawing technologies. Magnetic abrasive particles (MAPs) are attracted on a magnetized wire, thus leading to an increase in their number into the cutting zone. The number of instantaneous-effective abrasive particles (IEAPs) adsorbed on the wire surface has a great influence on the cutting efficiency of the saw wire. In this study, a mathematic model of the movement of the MAP is presented, and the factors influencing the IEAPs number, including slurry-supply speed and slurry dynamic viscosity, are… More >

Jinfeng Liu¹, Yuzhe Zhang¹, Yushi Jiang¹, Hongji Sun¹, Ruijie Duan¹, Jing Qu², Dan Yao¹, Siyan Liu^2,*, Shuyan Guan^2,*

Phyton-International Journal of Experimental Botany, Vol.91, No.7, pp. 1327-1340, 2022, DOI:10.32604/phyton.2022.019870 - 14 March 2022

Abstract Seed shattering refers to the phenomenon in which the pods split along the abdominal and back sutures before the crop is received, so that the seeds are spread. Seed shattering is vital to the reproduction of their offspring in wild plants, but it is also the main cause of crop yield loss reason. Pod-explosion resistance is a complex process of physical and physiological and biochemical reactions. Soybean seed shattering phenomenon is widespread, which severely restricts the development of soybean industry. Seed shattering (pod cracking or fruit dropping) is essential for the reproduction of its offspring… More >

Jianhui Yang¹, Kai Shen¹, Shoudong Pan², Shuren Wang^3,*, Zhengsheng Zou³

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.2, pp. 243-255, 2022, DOI:10.32604/fdmp.2022.016677 - 16 December 2021

Abstract The large deformation of soft rock tunnel is one of the key problems to be overcome in the tunnel construction stage. In the present study, the deformation mechanism of a representative tunnel and some related countermeasures are investigated using field tests and engineering geological analysis. Owing to the scarce performances of methods based on other criteria such as small pipe spacing, anchor bolt length and steel frame spacing, a new support scheme is implemented and optimized. Results show that shear failure and bedding sliding are produced under high horizontal stress conditions. The low strength of More >

Wen-Jay Lee^1,*, Yu-Chien Lo², Anchen Yang³, Kuanpeng Chen³, Nan-Yow Chen³

CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.2, pp. 293-304, 2019, DOI:10.32604/cmes.2019.06620

Abstract Different thickness of amorphous/nanocrystalline multi-layered structure can be used to modulate the strength and ductility of the composite materials. In this work, molecular dynamics simulations were conducted to study the thickness effect of nanocrystalline layer on mechanical properties and deformation behavior of the Cu₆₄Zr₃₆/Cu multi-layer structure. The stress-strain relationship, local stress, local strain, and deformation mechanism are investigated. The results reveal that the change of thickness of the crystalline layer significantly affects the mechanical properties and deformation behavior. As the strain at the elastic region, the amorphous Cu₆₄Zr₃₆ layer dominates the mechanical behavior, leading the fact More >

Yong Liu¹, Jianping Wei^2,3

FDMP-Fluid Dynamics & Materials Processing, Vol.11, No.3, pp. 221-240, 2015, DOI:10.3970/fdmp.2015.011.221

Abstract Although the socalled percussion-pulsed-water jet technique is currently recognized as an effective means for breaking hard rocks, it can’t be extensively employed due to insufficient systematic research on the related flow-field structure. Considered as one of the rock breaking technologies with the highest potential of development and application, this method is characterized by water hammer effects, a high-frequency impact pressure and high-speed side flows. The typical (impact and extrusion) pistons used for this technique collide several times to form the multi-pulsed jet. Here we analyze these features through a combined experimental-numerical investigation. The number of… More >