Three-dimensional (3D) porous scaffolds made of biopolymers have attracted significant attention in tissue engineering applications. In this study, cellulose-nanofibers/polyethylene glycol diacrylate (CNFs/PEGDA) mixture, a novelty 3D material, was prepared by physical mixing the CNFs with waterborne photopolymerizable acrylic resin (PEGDA). Then CNFs/PEGDA mixture used to fabricate cytocompatibility hydrogel scaffold stereolithograph（SLA）process. The hydrogels were shaped SLA, and then...

There exist several honeycomb networks exhibiting zero Poisson's ratio (ZPR). Applications of these can be found in different fields. The ZPR properties structures have been mechanically modeled and tested. However, the underlying mechanism driving behavior has not paid much attention. present work focuses on deformation networks. Through discussion comparison process ZPR, auxetic common networks, strain‐isolation is proposed to explain behavior. Then, according this mechanism, reversed...

Thin-walled structures play an important role as energy absorber in all kinds of crash accidents due to their excellent absorption characteristics and lightweight. This paper aims investigate the crashworthiness thin-walled tapered tubes with star-shaped cross section under oblique impact. Firstly, finite element model is validated through compressive tests. Then, tube impacted five different loading angles impact responses are studied parameters such peak force (Fmax) specific (SEA)....

In this article, a novel multi-cell conical tube is designed. First, detail analysis about the crashworthiness of three structures, that is, tube, square tapered and fourfold-cell made compared at condition keeping same mass with different oblique load angles. Then, influences internal cell walls, angle, cone wall thickness on performances are investigated. The has better energy absorption capacity than small normalization average gradients angle specific reached 48.25% thickness. full...

The separator is an important component of the lithium‐ion batteries (LIBs). Considering influence temperature and hygroexpansion effect cellulose materials, mechanical properties separators in air (dry), electrolyte immersion (wet), elevated (heated) environments are studied. Firstly, orthogonal experiments were designed conducted to investigate effects various factors on tensile separators. Based results test, polypropylene (PP) then subjected puncture test under dry wet condition,...

It is of great essence to unveil relationship between structure, mechanical properties, and application bionic design. Targeting at alleviating the debonding failure issue in internal structures wind turbine blade, reversed-semi-reentrant (RSRE) honeycomb angular gradient (AG) with zero Poisson's ratio are considered design spar/shear web structure. Through finite element methods, behaviors these two types honeycombs were compared that hexagonal honeycomb. The ability RSRE reduce shear...

Abstract As a satisfactory green material for lithium ion battery separator, cellulose possesses better wettability and superior thermal chemical stability compared to commercial polyolefin separators. The macroscopic mechanical properties of the separator are determined by structural parameters on different dimensional scales. In this paper, two‐scale modelling method is proposed separator. At micro‐scale, single fiber model was established with cross‐sectional profile extracted through...

Based on the mid axis pattern configuration, topology adaption of plant leaf vein is discussed in first place., Secondly, combined with blade principal stress field distribution cases, adaptive design applied structure by modifying ldquomid patternrdquo innovative method, created and its performances were analyzed when working random wind field. The results show that output response more stable than traditional one. Further more, considering material application, performance carbon...

Vulcanization is a pivotal process of tire manufacturing, endowing the uncured with exquisite surface pattern and superior performance by converting rubber property from plasticity to elasticity. However, defects incomplete expansion, asymmetric structure, vapor condensation deposition in existing vulcanization technology inferiorly affect uniformity dynamic balance tires. In our paper, novel curing equipment, i.e., vulcanized inner mold drum (VIMD) designed improve traditional for...

Purpose The purpose of this paper is to present the novel parameterized digital-mask generation method which aimed at enhancing bio-scaffold’s fabricating efficiency with digital micro-mirror device (DMD)-based systems. Design/methodology/approach A directly generate masks bio-scaffolds without modeling entire 3D scaffold models presented. In most conventional methods, it inefficient dynamically modify size structural unit cells during design, because relies more or less on commercial...

Modeling of paper fibrous network is necessary and meaningful. This presents a method for modeling Young’s modulus calculation wood paper, based on the morphology network. Sixteen groups eucalyptus pulp sheets were prepared with different processing parameters. Samples cut Scanning Electron Microscope (SEM) images capture, which structural models networks constructed through digital image technology. A reconstructing algorithm proposed in this mainly includes “skeleton” extraction...

Traditional wind turbine blade design theory carried on the of airplane wing, but classical air dynamics can not make an agreement between capture efficiency, cost and mechanical performances turbines. Based natural optimum growth roles, a new bionic topology method for has been investigated in this paper, performance using compared to that designed by one traditional method. The numerical result shows model performs better some aspects blade's behavior, such as static strength,...