Development of melt-stretching technique for manufacturing fully-recyclable thermoplastic honeycombs with tunable cell geometries

Cheng

Third International Conference on Mechanical Design and Simulation (MDS 2023)

2023

The continuous innovation of machinery manufacturing technology is machinery: the technical basis and power of industrial development. With the rapid development of China's economy and technology, it has also promoted the development of China's informatization to a certain extent. In the process of development, all fields need to improve work efficiency through advanced computer technology. In order to better meet the needs of China's social development, we must constantly change the original form of economic development, update the original development concept, increase the innovation of mechanical design and manufacturing industry, so that it can better meet the needs of social development and improve its progressiveness level.

Section: Introductionmentioning

confidence: 99%

Development of mechanical design and manufacturing based on KNN algorithm

Cheng

Third International Conference on Mechanical Design and Simulation (MDS 2023)

2023

“…The low density, high mechanical strength, and excellent formability of the 3D-molded wood offers broad versatility in designing and manufacturing large, lightweight, load-bearing designs. One example is a honeycomb structure, which is usually made of polymers or metals such as the Al-5052 alloy (40,41). We fabricated 3D-molded wood honeycomb structures by molding the material along the wood fiber direction (fig.…”

mentioning

confidence: 99%

Lightweight, strong, moldable wood via cell wall engineering as a sustainable structural material

Xiao

Chen

Xia

et al. 2021

Science

207

100

Turning wood into honeycombs Wood is an attractive material for structural applications, but it usually works best as boards or sheets. Xiao et al . have developed a process for engineering hardwood that allows these sheets to be manipulated into complex structures (see the Perspective by Tajvidi and Gardner). The key is to manipulate the cell wall structure by shrinking and blasting open the fibers and vessels by drying and “water-shocking” them. This process creates a window wherein the wood can be manipulated without ripping or tearing. Honeycomb, corrugated, or other complex structures are locked in once the wood dries. —BG

“…A notable design strategy for strengthening nanocrystalline metal is to emulate the columnar structures found in nature, such as bamboo 15,16 and honeycomb 17,18 , where the highly anisotropic structural arrangements can sustain large mechanical loadings, producing improved strength and hardness. Bamboo has a columnar structure with longitudinally aligned fibers comprising hollow tubular structures 15 , generating high strength-to-weight and stiffness-toweight ratios, as well as high bending strength 16 .…”

mentioning

confidence: 99%

“…Bamboo has a columnar structure with longitudinally aligned fibers comprising hollow tubular structures 15 , generating high strength-to-weight and stiffness-toweight ratios, as well as high bending strength 16 . Honeycomb structures exhibit similar characteristics with a large number of hollow columnar areas that can host a secondary phase 18 , and the cooperation of such a phase and the support of the skeleton structure can sustain high compressive stress applied parallel to the column direction 19 . This strategy holds promise for improving strength and hardness of metals by constructing nanocolumnar films via magnetron sputtering codeposition 20 .…”

mentioning

confidence: 99%

Bamboo-like dual-phase nanostructured copper composite strengthened by amorphous boron framework

Gao

Zhang

et al. 2023

Nat Commun

Grain boundary engineering is a versatile tool for strengthening materials by tuning the composition and bonding structure at the interface of neighboring crystallites, and this method holds special significance for materials composed of small nanograins where the ultimate strength is dominated by grain boundary instead of dislocation motion. Here, we report a large strengthening of a nanocolumnar copper film that comprises columnar nanograins embedded in a bamboo-like boron framework synthesized by magnetron sputtering co-deposition, reaching the high nanoindentation hardness of 10.8 GPa among copper alloys. The boron framework surrounding copper nanograins stabilizes and strengthens the nanocolumnar copper film under indentation, benefiting from the high strength of the amorphous boron framework and the constrained deformation of copper nanocolumns confined by the boron grain boundary. These findings open a new avenue for strengthening metals via construction of dual-phase nanocomposites comprising metal nanograins embedded in a strong and confining light-element grain boundary framework.