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Members Made of Elastoplastic Material

Members Made of Elastoplastic Material

The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...

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Updated: Jun 22, 2025

Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures

Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures

Published on: April 11, 2017

3D printable elastomers with exceptional strength and toughness.

Zizheng Fang^1,2, Hongfeng Mu¹, Zhuo Sun¹

¹State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.

|July 3, 2024

Summary

This study introduces a novel 3D photo-printable resin for advanced elastomers. The new material achieves superior tensile strength and toughness, overcoming limitations in 3D printed polymer performance.

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Published on: February 12, 2016

Area of Science:

Materials Science
Polymer Chemistry
Manufacturing Engineering

Background:

Three-dimensional (3D) printing offers design freedom but suffers from low efficiency and poor mechanical properties in polymers.
Existing ultra-fast 3D printing methods improve speed but not material performance.
Current printing constraints limit molecular design for high-performance polymers.

Purpose of the Study:

To develop a 3D photo-printable resin chemistry for high-performance elastomers.
To address the limitations of mechanical properties in 3D printed polymers.
To enable mass manufacturing applications for 3D printed materials.

Main Methods:

Development of a novel photo-printable resin formulation.
Utilizing dynamic covalent bonds for polymer network reconfiguration.
Characterization of mechanical properties (tensile strength, toughness) and micro-architectural features.

Main Results:

Achieved an elastomer with 94.6 MPa tensile strength and 310.4 MJ/m³ toughness.
Demonstrated mechanical performance exceeding all previously 3D printed elastomers.
Identified dynamic covalent bonds enabling hierarchical hydrogen bonding, micro-phase separation, and interpenetration.

Conclusions:

The novel resin chemistry overcomes key limitations in 3D printed polymer performance.
Dynamic covalent bonds are crucial for achieving superior mechanical properties.
This advancement paves the way for mass manufacturing using 3D printing technology.