Pengaruh Variasi Layer Thickness Pada Struktur Diamond Berbasis Shape Memory Polymer tBA/HDDA Dengan Metode Digital Light Processing

Satrianugraha, Rifqi Fernady (2026) Pengaruh Variasi Layer Thickness Pada Struktur Diamond Berbasis Shape Memory Polymer tBA/HDDA Dengan Metode Digital Light Processing. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5011221111_Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Perkembangan teknologi additive manufacturing mendorong pemanfaatan 3D printing sebagai metode fabrikasi dengan fleksibilitas desain tinggi dan kemampuan menghasilkan geometri kompleks. Digital Light Processing (DLP) merupakan kategori vat photopolymerization yang menawarkan resolusi tinggi, akurasi geometrik yang baik, serta kompatibel dengan material fungsional seperti Shape Memory Polymer (SMP). SMP memiliki kemampuan shape memory effect yang berpotensi diaplikasikan pada struktur adaptif seperti geometri triply periodic minimal surface (TPMS) tipe diamond. Akan tetapi, kualitas struktur kompleks berbasis SMP masih sangat dipengaruhi oleh parameter proses pencetakan, khususnya layer thickness, sehingga studi mengenai pengaruh kedua parameter tersebut terhadap kualitas geometris, sifat mekanik, dan performa Shape Memory Effect masih terbatas. Penelitian ini bertujuan untuk menganalisis pengaruh variasi layer thickness terhadap kualitas geometris struktur diamond, mengevaluasi sifat mekanik SMP dan performa Shape Memory Effect. Penelitian diawali dengan perancangan menggunakan Autodesk Fusion 360, proses slicing dengan variasi parameter pencetakan, serta fabrikasi spesimen menggunakan mesin VPP DLP yang dilanjutkan dengan post-curing. Karakterisasi dilakukan melalui pengujian FTIR-ATR dan SEM, sedangkan evaluasi performa mekanik menggunakan bending test serta pengujian shape fixity dan shape recovery untuk menilai kemampuan SME. Hasil penelitian menunjukkan bahwa variasi layer thickness berpengaruh akan kualitas geometri, sifat mekanik, dan performa SME struktur diamond. Variasi 0,05 mm menghasilkan kualitas terbaik dengan efek stair-stepping lebih sedikit dan permukaan yang paling homogen, sedangkan variasi 0,06 mm memberikan kombinasi keseimbangan antara geometri, sifat mekanik, dan performa SME. Hasil FTIR menunjukkan seluruh spesimen mempunyai gugus fungsi yang sama, sedangkan SEM menampilkan ikatan antarlapisan yang lebih baik pada layer thickness lebih kecil. Seluruh spesimen memiliki nilai shape recovery diatas 70%, sementara shape fixity tertinggi diperoleh pada variasi 0,06 mm sebesar 93,95%, diikuti oleh 0,05 mm sebesar 92,7% dan 0,07 mm dengan 82,9%. Selengkapnya, layer thickness 0,06 mm dipilih karena memberikan kondisi optimal antara keseimbangan kualitas geomteri, sifat mekanik dan performa SME-nya, sehingga berpeluang untuk diterapkan sebagai parameter proses untuk aplikasi struktur adaptif berbasis SMP.
========================================================================================================================================
The development of additive manufacturing technology encourages the use of 3D printing as a fabrication method with high design flexibility and the ability to produce complex geometries. Digital Light Processing (DLP) is a category of vat photopolymerization that offers high resolution, good geometric accuracy, and is compatible with functional materials such as Shape Memory Polymer (SMP). SMP has a shape memory effect capability that has the potential to be applied to adaptive structures such as diamond-type triply periodic minimal surface (TPMS) geometries. However, the quality of complex SMP-based structures is still strongly influenced by printing process parameters, especially layer thickness, so studies on the influence of these two parameters on geometric quality, mechanical properties, and Shape Memory Effect performance are still limited. This study aims to analyze the effect of layer thickness variations on the geometric quality of diamond structures, evaluate the mechanical properties of SMP and Shape Memory Effect performance. The study began with design using Autodesk Fusion 360, the slicing process with various printing parameters, and specimen fabrication using a VPP DLP machine followed by post-curing. Characterization was carried out through FTIR-ATR and SEM tests, while mechanical performance evaluation used bending tests as well as shape fixity and shape recovery tests to assess the SME capability. The results showed that variations in layer thickness affected the geometry quality, mechanical properties, and performance of diamond structure SMEs. A variation of 0.05 mm produced the best quality with less stair-stepping effect and the most homogeneous surface, while a variation of 0.06 mm provided a balanced combination of geometry, mechanical properties, and SME performance. FTIR results showed that all specimens had the same functional groups, while SEM showed better interlayer bonding at smaller layer thicknesses. All specimens had shape recovery values above 70%, while the highest shape fixity was obtained at a variation of 0.06 mm at 93.95%, followed by 0.05 mm at 92.7% and 0.07 mm at 82.9%. In more detail, the layer thickness of 0.06 mm was chosen because it provides optimal conditions between the balance of geometric quality, mechanical properties and SME performance, so it has the potential to be applied as a process parameter for SMP-based adaptive structure applications.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Digital Light Processing, Ketebalan Lapisan, Shape Memory Effect, Shape Memory Polymer, Struktur Diamond, Diamond Structure, Digital Light Processing, Layer Thickness, Shape Memory Effect, Shape Memory Polymer
Subjects:	Q Science > QD Chemistry > Polymerization T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ223.A25 Actuators.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Rifqi Fernady Satrianugraha
Date Deposited:	26 Jul 2026 05:32
Last Modified:	26 Jul 2026 05:32
URI:	http://repository.its.ac.id/id/eprint/137407

Actions (login required)

View Item