TAILIEUCHUNG - Tribology Handbook 2E Episode 15

Tham khảo tài liệu 'tribology handbook 2e episode 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | E8 Mechanisms of wear Wear can be defined as the progressive loss of substance resulting from mechanical interaction between two contacting surfaces. In general these surfaces will be in relative motion either sliding or rolling and under load. Wear occurs because of the local mechanical failure of highly stressed interfacial zones and the failure mode will often be influenced by environmental factors. Surface deterioration can lead to the production of wear particles by a series of events characterised by adhesion and particle transfer mechanisms or by a process of direct particle production akin to machining or in certain cases a surface fatigue form of failure. These three mechanisms are referred to as adhesive abrasive and fatigue wear and are the three most important. In all three cases stress transfer is principally via a solidsolid interface but fluids can also impose or transfer high stresses when their impact velocity is high. Fluid erosion and cavitation are typical examples of fluid wear mechanisms. Chemical wear has been omitted from the list because environmental factors such as chemical reaction influence almost every aspect of tribology and it is difficult to place this subject in a special isolated category. Chemical reaction does not itself constitute a wear mechanism it must always be accompanied by some mechanical action to remove the chemical products that have been formed. However chemical effects rarely act in such a simple manner usually they interact with an influence a wear process sometimes beneficially and sometimes adversely. SURFACE FILMS RUPTURED WITH DIRECT INTERACTION BETWEEN THE MATERIALS A simplified picture of adhesive wear ADHESIVE WEAR The terms cohesion and adhesion refer to the ability of atomic structures to hold themselves together and form surface bonds with other atoms or surfaces with which they in intimate contact. Two clean surfaces of similar crystal structure will adhere strongly to one another simply by placing them

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.