Một nghiên cứu về phá hủy của cấu trúc rỗng IN 3D-FDM

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Tác giả: Sherif El-Gizawy Ahmed, Quang Thế Phan, Thị Phương Thảo Phan

Ngôn ngữ: vie

Ký hiệu phân loại: 513.3 Arithmetic

Thông tin xuất bản: Khoa học và Công nghệ (Đại học Thái Nguyên), 2018

Mô tả vật lý: 115-120

Bộ sưu tập: Metadata

ID: 491494

Thêm vào giỏ

Fused deposition modeling (FDM) is an additive process for thermal plastics that can create not only nearly solid structure but also porous structure with a various percentage of voids depending on selected air gaps. Similar to the composite materials, the strength of the structure is determined by both autoadhesion between roads, layers and strength of the roads themselves. The nature of material's failure under the actions of loads however is not really understood. This paper presents an experimental study of the nature of failure for materials with a porous structure generated by FDM with the use of Acrylonitrile butadience styrene (ABS) as model material and raster's orientations of (45°)x(-45°). Moreover, the difference in the material behavior under autoadhesion and axial tests were experimentally evident involving with heat transfer and diffusion at contacts.Fused deposition modeling (FDM) là một quá trình gia công vật liệu polymer theo nguyên tắc bồi đắp nhằm tạo nên các cấu trúc gần đặc hoặc rỗng phụ thuộc vào việc lựa chọn khoảng trống giữa các sợi khi bồi đắp. Tương tự như vật liệu composite, độ bền của cấu trúc được xác định bởi độ bền tại chỗ tiếp xúc giữa các sợi và các lớp bồi đắp cũng như bản thân các sợi. Tuy nhiên, bản chất phá hủy của cấu trúc vẫn chưa được làm rõ trong các nghiên cứu hiện tại. Nghiên cứu thực nghiệm về bản chất phá hủy của vật liệu có cấu trúc rỗng được tạo ra bằng phương pháp FDM sử dụng Acrylonitrile butadience styrene (ABS) làm vật liệu bồi đắp với hướng bồi đắp là (45°)x(-45°). Từ kết quả có thể thấy được sự khác nhau về behavior của vật liệu giữa các thí nghiệm autoadhesion và kéo có liên quan tới truyền nhiệt và khuếch tán trong quá trình FDM.

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