積層製造彈性微結構體機械性質測試與分析

Elastomers Lattice Structures for Additive Manufacturing of Mechanical Properties and Analysis

莊必任(Bi-Ren Zhuang)

指導教授 ： 王文騰

國立虎尾科技大學/工程學院/機械與電腦輔助工程系碩士班/碩士(2017年)

摘要

積層製造於現今的應用領域越來越廣泛，包含工業機械、醫療與太空等領域，其優勢在於能夠製造出複雜結構之形狀、客製化進而提高其附加價值。本研究透過微結構設計，配合彈性材料，採用積層製造成型技術，進行各項國際標準規範之機械性質測試，藉由各項測試所得到的實驗結果，探討不同微結構之間的特性，並與乙烯/醋酸乙烯酯共聚物(Ethylene Vinyl Acetate，簡稱EVA)發泡材料的性質進行比較，找尋出彈性微結構體模型能夠滿足EVA發泡材的特性。
本研究之實驗結果發現，在不同微結構設計與鞋中底之EVA發泡材對比下，經由微結構造型的變化，能夠有滿足鞋中底EVA發泡材的可能性，表明出微結構領域能應用於鞋中底的可行性。此外，本研究在壓縮測試建立有限元素分析方法，進行模擬與實驗間的比對，大部分模擬能與實驗有近似的趨勢與結果，建立出能夠評估不同微結構與發泡試片的壓縮特性。
最終本研究建立出一套流程，評估不同微結構與EVA發泡材的特性，而且透過模擬分析建立預測壓縮特性方法，提供將來於工程應用時，能夠縮短開發時間，提高生產效益。

關鍵字

積層製造 ； 發泡材料 ； 微結構設計 ； 有限元素法 ； 機械性質測試

並列摘要

Nowadays, the application of additive manufacturing has been wider and wider, such as mechanical engineering, medical field, aerospace and so on. The advantage of additive manufacturing is the capability to manufacturing customized and complicated parts for high value added products. Specimen with different types of lattice structures was designed and generated with elastic material by additive manufacturing. Then mechanical properties of specimen were gotten by international standard test methods. Test results showed specific behaviors of different lattice structures. And the comparison of properties between Ethylene Vinyl Acetate(EVA) foam and lattice structures was made to find a suitable one to replace conventional EVA material.
The study found that the specimen properties of the specific topology and lattice structure design will meet the need of a midsole that is made of EVA foam conventionally. It indicates that an additive-manufacturing midsole with a specific lattice structure can substitute EVA-foam one. In addition, a process of finite element analysis was established for a compression test in this study, and there is a similar trend between FEA simulations and real tests through a comparison of results. This process of simulation will get an evaluation of compression characteristics quickly for different lattice structures design before a real test.
Summarily, the study establishes a procedure to evaluate behaviors of different lattice structures and EVA foam. Moreover, the different designs can be evaluated in advance by FEA simulation of a compression test. It can save much time to improve efficiency while this procedure is applied to the development of new additive-manufacturing elastic parts.

並列關鍵字

Additive Manufacturing ； Foam Material ； Lattice Structures Design ； Finite Element Method ； Mechanical Property Test

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