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Mô Hình Tải – Giải Nén Trong Liên Kết Giữa Các Bề Mặt Thô Fractal
Tóm tắt
Bài báo này trình bày một mô hình đàn hồi – nhựa trong quá trình tải và giải nén giữa các bề mặt thô fractal ba chiều. Trong quá trình tải, các tính chất cơ học của một asperity đơn lẻ tuân theo lý thuyết Hertz. Trong quá trình giải nén, các mối quan hệ tải – vùng tiếp xúc của một asperity đơn lẻ được xác định bằng mô hình EK. Các hàm phân phối kích thước cắt cho các cấp độ khác nhau của asperities được suy diễn. Và diện tích tiếp xúc thực tổng thể cũng như tổng tải trọng tiếp xúc được thu được trong suốt quá trình tải – giải nén. Kết quả cho thấy khi bề mặt thô đang trong trạng thái biến dạng đàn hồi, các mối quan hệ tải – vùng trong quá trình tải và giải nén là giống nhau. Khi bề mặt thô đang trong trạng thái biến dạng không đàn hồi, diện tích tiếp xúc thực tổng thể trong quá trình giải nén lớn hơn trong quá trình tải. Một thí nghiệm được thiết kế để xác minh tính hợp lệ của mô hình hiện tại.
Từ khóa
#mô hình tải – giải nén #bề mặt thô fractal #biến dạng đàn hồi #biến dạng không đàn hồi #diện tích tiếp xúc thựcTài liệu tham khảo
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