Biao Wang¹, Yuxiang Peng^1,*, Wenhua Xu²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.3, pp. 1-2, 2024, DOI:10.32604/icces.2024.012061

Abstract The damage process of ship structures under near-field underwater explosions involves strong nonlinear coupling effects of multiple media, and its numerical simulation poses a serious challenge to traditional numerical algorithms. Based on previous research, this article first establishes a highly compressible multiphase flow numerical calculation model based on the high-precision Discontinuous Galerkin Method (DGM) and a ship elastic-plastic damage dynamic model based on the meshless Reproducing Kernel Particle Method (RKPM). Furthermore, we develop an algorithm for grid-independent dynamic expansion of cracks. Based on this, the Boundary Data Immersion Method (BDIM) is used to couple the More >

Jianghong Yang¹, Yingjun Wang^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.011249

Abstract Multiscale structures can be more robust to partial damage than solid structures. Inspired by this, a novel fail-safe topology optimization method is proposed for multiscale structures. Computational cost is reduced by simplifying the partial damage of the truss-like microstructure and polynomial function is used to fit the effective elasticity tensor obtained via the homogenization method. Moreover, Heaviside projection is applied to speed up the convergence and yield a relatively clear configuration. Numerical examples are tested to demonstrate the advantages of the optimized multiscale structures. Numerical examples are tested to demonstrate that the optimized multiscale structures More >

Jinyu Gu¹, Yingjun Wang^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.010958

Abstract In engineering practice, most components are subjected to variable-amplitude cyclic loading, resulting in fatigue damage, which is one of the main forms of damage in engineering structures. Nonlinear damage rule is developed based on linear damage rule, which can predict the fatigue life of structures more accurately. Therefore, we present a topology optimization method considering nonlinear fatigue damage accumulation in the time domain. For the time domain, we adopted the rainflow counting method to evaluate the stress level generated by cyclic loading and the Basquin equation to describe the S-N curve. We applied Morrow's plastic… More >

Qianyu Xia¹, Zhixin Zhan^1,*, Weiping Hu¹, Qingchun Meng¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.1, pp. 1-1, 2024, DOI:10.32604/icces.2024.011238

Abstract The occurrence of crystal cleavage and slip at the microscopic level in single crystal materials serves as the fundamental underlying factors leading to their macroscopic failures. Therefore, investigating the failure mechanisms and damage processes at the scale of slip systems significantly enhances our comprehension of the degradation and failure patterns exhibited by crystal materials.
In this study, based on the theory of crystal plasticity, we examine the effects of microscopic damage on the slip systems concerning the failure of face-centered cubic (FCC) crystal materials. Additionally, we develop a novel damage model for FCC crystal materials, incorporating… More >

KAITIAN ZHANG^1,#, MINGZHU LI^2,#,*, JIANPING ZHANG³, JINFENG LI², KUNLANG LI², HUANQIAN LU², JINYAN LV²

BIOCELL, Vol.48, No.10, pp. 1489-1501, 2024, DOI:10.32604/biocell.2024.053930 - 02 October 2024

Abstract Objective: Studies have demonstrated that administering statins promptly following myocardial ischemia/reperfusion (MI/R) can confer cardioprotective benefits. This study investigates whether Lovastatin can modulate the Yes-associated protein/Transcriptional co-activator with PDZ-binding motif (YAP/TAZ) signaling pathway to mitigate cardiomyocyte injury caused by hypoxia/reoxygenation (H/R). Methods: The in vitro MI/R model was established by H/R in rat myocardial H9c2 cells, and the cells were pretreated with varying doses of Lovastatin before reoxygenation. The extent of cellular injury was evaluated by measuring the myocardial enzyme content and cell viability. The levels of oxidative stress and inflammatory factors were quantified by enzyme-linked… More > Graphic Abstract

Giada Faraco, Andrea Vincenzo De Nunzio, Nicola Ivan Giannoccaro^*, Arcangelo Messina

Structural Durability & Health Monitoring, Vol.18, No.6, pp. 739-762, 2024, DOI:10.32604/sdhm.2024.052663 - 20 September 2024

Abstract The possibility of determining the integrity of a real structure subjected to non-invasive and non-destructive monitoring, such as that carried out by a series of accelerometers placed on the structure, is certainly a goal of extreme and current interest. In the present work, the results obtained from the processing of experimental data of a real structure are shown. The analyzed structure is a lattice structure approximately 9 m high, monitored with 18 uniaxial accelerometers positioned in pairs on 9 different levels. The data used refer to continuous monitoring that lasted for a total of 1… More >

Hao Xu¹, Jing Wang², Rubin Zhu², Alfred Strauss³, Maosen Cao⁴, Zhanjun Wu^1,*

Structural Durability & Health Monitoring, Vol.18, No.6, pp. 785-803, 2024, DOI:10.32604/sdhm.2024.051393 - 20 September 2024

Abstract Delamination is a prevalent type of damage in composite laminate structures. Its accumulation degrades structural performance and threatens the safety and integrity of aircraft. This study presents a method for the quantitative identification of delamination identification in composite materials, leveraging distributed optical fiber sensors and a model updating approach. Initially, a numerical analysis is performed to establish a parameterized finite element model of the composite plate. Then, this model subsequently generates a database of strain responses corresponding to damage of varying sizes and locations. The radial basis function neural network surrogate model is then constructed More >

Qian Sun¹, Chao Yuan², Shisen Zhao³

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.40, No.2, pp. 1-8, 2024, DOI:10.23967/j.rimni.2024.06.001 - 19 June 2024

Abstract Exploring the rock failure mechanism from an energy perspective is crucial for ensuring the safe construction of tunnels under complex geological conditions. In this study, a progressive damage and failure model of rock elements is established using the strain-energy-density theory based on the thermodynamic theory. Specifically, the rock elements are considered to have failed when the strain energy density absorbed by the element is greater than the critical strain energy density. Besides, the damage evolution of rock elements is reflected through the reduction of elastic modulus, until the element only has a certain residual strength.… More >

Bushra Rehman¹, Asma Zulfiqar¹, Houneida Attia², Rehana Sardar³, Muneera A. Saleh², Khalid H. Alamer⁴, Ibtisam M. Alsudays⁵, Faisal Mehmood⁶, Qamar uz Zaman^7,*

Phyton-International Journal of Experimental Botany, Vol.93, No.8, pp. 1819-1838, 2024, DOI:10.32604/phyton.2024.048780 - 30 August 2024

Abstract Salinity is a major abiotic stress that hinders plant development and productivity and influences agricultural yield. Seed priming is a technique used to boost germination and seedling growth under abiotic stress. A pot experiment was conducted to evaluate the impact of seed priming with potassium nitrate (KNO₃) at various levels (0%, 0.50%, 1.00% and 1.50%) under salt stress (0, 75, 100 mM NaCl) on two maize verities (MNH360 and 30T60) for the growth, development and metabolic attributes results revealed that in maize variety MNH360, KNO₃ priming’s significantly enhanced growth parameters than in maize variety 30T60 under… More >

Suogui Shang¹, Kechao Gao¹, Qingbin Wang¹, Xinghua Zhang¹, Pengli Zhou^2,3,*, Jianhua Li^2,3, Peng Chu^2,3

Energy Engineering, Vol.121, No.9, pp. 2505-2524, 2024, DOI:10.32604/ee.2024.050094 - 19 August 2024

Abstract Hydraulic fracturing is a mature and effective method for deep oil and gas production, which provides a foundation for deep oil and gas production. One of the key aspects of implementing hydraulic fracturing technology lies in understanding mechanics response characteristics of rocks in deep reservoirs under complex stress conditions. In this work, based on outcrop core samples, high-stress triaxial compression tests were designed to simulate the rock mechanics behavior of deep reservoirs in Bozhong Sag. Additionally, this study analyzes the deformation and damage law for rock under different stress conditions. Wherein, with a particular focus… More >