In this paper,we propose a novel porous metamaterial structure with an improved acoustic energy absorption performance at high-temperature and in the low-frequency range.In the proposed novel porous metamaterial structure,a porous material matrix containi
The dynamic compressive deformation of frozen soil was investigated by conduct-ing the split-Hopkinson pressure bar (SHPB) experiments at three temperatures and different high strain rates,and the dynamic stress-strain responses and failure modes of the f
In this work,the head-on collision and transmission with nonreciprocal properties of opposite propagating solitary waves are studied,in which the interface between different granular chains is considered.Due to the discontinuity of two periodic granular s
Fracture toughness is an important index in safety evaluation for materials and structures.Its convenient and accurate characterization has attracted extensive attention.For small specimens,traditional testing methods of fracture toughness are not suitabl
Energy absorption performance has been a long-pursued research topic in design-ing desired materials and structures subject to external dynamic loading.Inspired by natural bio-structures,herein,we develop both numerical and theoretical models to analyze t
Solid-liquid composites (SLCs) with novel thermal/electronic/mechanical prop-erties imparted by programmable and functional liquid inclusions have attracted considerable research interest in recent years,and are widely used in smart electronics and soft r
The rigid-plastic assumption has greatly simplified the theoretical analysis of dynamic plastic response of structures.Within this framework,a common tool is the modal technique using approximate independent yield criteria,which leads to upper-and lower-b
For the development of the fast charging technology of lithium-ion batteries,describing the rapid transient mass diffusion process accurately is the premise to avert the mechanical degradation caused by the diffusion-induced stress.In this paper,we presen
复杂的表面微结构在自然界中普遍存在,它们赋予生物组织优异的物化功能.受此启发,各类仿生结构在工程领域(如微机电系统、能源材料、生物传感等)得到了广泛应用.论文利用磁控溅射技术在粘性的胶体基底上沉积金属铁薄膜,研究了薄膜中自发形成的褶皱结构,重点分析了约束边界和膜厚梯度边界对褶皱形貌的调控效应.实验发现,随着膜厚的增加,薄膜表面由网状折叠逐渐演变为迷宫褶皱,褶皱波长先是略微下降,随后保持不变.约束边界附近,褶皱波长连续变化,表现为多级褶皱的特征.膜厚梯度区域,褶皱具有明显取向,而波长基本不变.基于应力理论,
The dynamic response and energy absorption performance of foam-filled tubes under lateral external blast loading were investigated experimentally and numerically.A series of blast tests for the foam-filled tubes with different geometric parameters were ca