Longgang Tian^1,2,*, Xiao Wang^1,2, Qi Zhang^1,2

The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.2, pp. 30-30, 2019, DOI:10.32604/icces.2019.04809

Abstract Various defects such as cracks and holes exist in coal-rock body and they have a large influence on the mechanical properties of coal-rock. Therefore, it is of great significance to study the fracture characteristics in order to understand the instability mechanism of coal body. In this study, a variety of defective coal-rock specimens with different cracks and holes were established by PFC software, and then the characteristics of stress-strain and crack evolution law of coal-rock were studied. Results show that the mechanical properties, crack propagating characteristics, propagation forms of initial crack and final crack distributions More >

LINGFENG CHEN^1,2,3, ZHIPENG GAO^1,2,3, BAIMEI LIU^1,2,3, YING LV^1,2,3, MEIWEN AN^1,2,3,*, JILING FENG^4,*

BIOCELL, Vol.42, No.1, pp. 25-34, 2018, DOI:10.32604/biocell.2018.06114

Abstract Arterial characterization of healthy descending thoracic aorta (DTA) is indispensable in determining stress distributions across wall thickness and different regions that may be responsible for aorta inhomogeneous dilation, rupture, and dissection when aneurysm occurs. Few studies have shown the inhomogeneity of DTA along the aorta tree considering changes in circumferential direction. The present study aims to clarify the circumferential regional characterization of DTA. Porcine DTA tissues were tested according to region and orientation using uniaxial tension. For axial test, results show that the difference in circumferential direction was mainly in collagen fiber modulus, where the… More >

Nikolay Dishovsky^1*, Petrunka Malinova¹, Ivan Uzunov²

Journal of Renewable Materials, Vol.6, No.4, pp. 402-412, 2018, DOI:10.7569/JRM.2017.634171

Abstract Natural products from agricultural wastes are finding importance in the polymer industry due to their many advantages such as being lightweight, low cost and environmentally friendly. In the present study the potential of the two types of rice husk ash (RHA) prepared under different conditions as fillers in natural rubber-based elastomer composites was investigated. The fillers were prepared by rice husks incineration and characterized by means of X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET) specific surface area, Hg-porosimetry and N2-adsorption. The evaluation involved determining the vulcanization characteristics… More >

Dalin Tang^1,*,2, Heng Zuo^2,*, Chun Yang², Zheyang Wu², Xueying Huang³, Rahul H. Rathod⁴, Alexander Tang⁴, Kristen L. Billiar⁵, Tal Geva⁴

Molecular & Cellular Biomechanics, Vol.14, No.3, pp. 137-151, 2017, DOI:10.3970/mcb.2017.014.137

Abstract Patients with repaired tetralogy of Fallot (TOF) account for the majority of cases with late onset right ventricle failure. Comparing TOF patients with healthy people may provide information to address this challenge. Cardiac magnetic resonance (CMR) data were obtained from 16 TOF patients (patient group, PG) and 6 healthy volunteers (healthy group, HG). At begin-of-ejection, better patient group (n=5, BPG) stress was very close to HG stress (54.7±38.4 kPa vs. 51.2±55.7 kPa, p=0.6889) while worse patient group (n=11, WPG) stress was 84% higher than HG stress (p=0.0418). Stress may be used as an indicator to differentiate More >