微结构布局对3D打印聚合物的故障特征的影响:3D打印聚合物:探索烯基丁 styrene中的损伤行为
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Updated: Jun 23, 2025
08:28
Stereolithographic 3D Printing with Renewable Acrylates
Published on: September 12, 2018
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Sofiane Guessasma1, Sofiane Belhabib2
1INRAE, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France.
Materials (Basel, Switzerland)
|June 19, 2024
概括
打印角度显著影响3D打印的烯丁 styrene (ABS) 的断裂行为. 量身定制的微结构布局可以控制机械不稳定性,并减轻3D打印聚合物的故障.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 聚合物科学 聚合物科学
背景情况:
- 3D打印,特别是聚变丝制造,越来越多地用于聚合物组件.
- 了解3D打印材料在拉伸负荷下的断裂行为对于其可靠的应用至关重要.
- 打印条件,如打印角度,可以显著影响烯丁烯 (ABS) 的机械性能.
研究的目的:
- 为了研究打印条件,特别是打印角度对3D打印的ABS在拉力负荷下断裂行为的影响.
- 为3D打印的ABS开发一个损坏模型,该模型可以解释微结构效应并预测故障特性.
- 建立隙特征和3D打印ABS的破裂特性之间的关系.
主要方法:
- 制造狗骨形状的ABS标本,使用各种打印角度的聚变丝制造.
- 对预先划分的样本进行拉伸测试,并对划分的长度和方向进行控制.
- 显微镜分析 (光学和扫描电子显微镜) 检查裂传播.
- 有限元计算以模拟微观结构重组引起的损伤.
主要成果:
- 在不同前长度的故障特性 (断裂时延长,最大应力) 和打印角度之间发现了线性相关性.
- 观察到逐渐损坏,有助于材料的最终性能.
- 开发了一个损坏模型,准确地捕捉了故障属性作为打印角度的函数,使用类似于西格形的损坏函数.
- 数字结果表明,损伤模式是由丝的排列和丝之间的粘附引起的.
结论:
- 该研究建立了一个拓定律,将隙大小和方向与3D打印ABS的破裂特性联系起来.
- 定制3D打印聚合物的微结构布局是控制机械不稳定性和防止故障的可行策略.
- 开发的损坏模型提供了对3D打印ABS故障机制的见解,考虑了微观结构方面.
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