TAILIEUCHUNG - Engineering Tribology Episode 2 Part 5

Tham khảo tài liệu 'engineering tribology episode 2 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Elastohydrodynamic Lubrication 325 scar does not occur . wear scar remains parallel to the worn surface. The tilt is also not observed for very smooth surfaces. The amount of wear that produces this tilt is limited to a depth which is approximately equal to the original surface roughness. At high levels of surface roughness the EHL film sustains a reduction in minimum film thickness and tilt formation is obscured or prevented by rapid wear of the contact 70 . Cavities filled with lubricant Undeformed remaining after solid-to-solid contact surface Cavity collapse and expulsion of lubricant Lubricant film maintained by Solid-to-solid contact Lubricant film maintained by flow from adjacent cavities Sharp asperities Blunt asperities Figure Effect of roughness and asperity shape on survival of EHL films. Micro-Elastohydrodynamic Lubrication Micro-EHL is a poorly understood lubrication concept that has only recently been invoked to explain the survival of heavily loaded concentrated contacts. A lubrication mechanism acting when two surfaces have a relative separation of À 1 was proposed by Sayles 33 . It was suggested that on the contacting surfaces there are features of the surface waviness which exhibit wavelengths of the same order but shorter than the contact width. on these features a much finer random surface texture of very much shorter wavelength is superimposed as shown in Figure . These surface features may deform elastically under EHL pressures to conform with similar features on the other contacting surface. Surfaces with wavy features are found in most practical applications. b -------------b------------ Figure Surface texture of the contacting surfaces b is the semiaxis of the contact ellipse in the direction of motion. The size of an asperity or a protuberance from the surface has a strong influence on the load required for plastic deformation. in simple terms when an asperity becomes smaller its corresponding radius of curvature must also

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.