Download or read book Experimental Investigation of the Interaction of Moisture Low Temperature and Low Level Impact on Graphite Epoxy Composites written by K. N. Lauraitis and published by . This book was released on 1980 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of low speed impact damage on composite materials is a new and potentially significant design condition for high performance systems. In metallic structure, damage due to tool drop, small rock impact and hail (while on the ground) did not constitute a damage of major concern. However, composites generally exhibit little inelastic ductility, are sensitive to secondary stresses, and are susceptible to splitting and delamination with cracks often propagating in the fiber direction through debonding. Upon failure, energy absorption is low. Due to these fracture characteristics and the low strain to failure, composite materials generally exhibit lower impact resistance than the metals typically used for aircraft construction. Environmental exposure may aggravate the deleterious effects of impact damage. It is well known that the mechanical properties of a polymeric matrix are susceptible to environmental degradation. Matrix cracking resulting from impact, loading or thermal cycling may provide pathways for moisture which can enter by laminar flow much more rapidly than by diffusion upon subsequent exposure to high humidity environment. Detrimental effects may also be expected because the internal tensile stress in the matrix increases with decreasing temperature, promoting crazing and the formation of microvoids.
Download or read book Experimental Investigation of the Interaction of Moisture Low Temperature and Low Level Impact on Graphite Epoxy Composites II written by K. N. Lauraitis and published by . This book was released on 1982 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The type of damage investigated in this program included; (a) that which is produced by low speed impact of a blunt object, such as an accidentally dropped hand tool; (b) severe delamination produced by residual strength testing of an impact damaged specimen; and (c) delamination produced by placing release film between two plies during fabrication. Specimens containing (a) and (b) type of damage were used in the first phase to experimentally determine: Amount of damage produced by the freeze-thaw cycle in representative impact damaged specimens; Amount of water picked up in the liquid state by the ruptured and delaminated regions of typical impact-damaged specimens; and Whether water migrates into and out of damaged regions during freeze-thaw cycling.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1981 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Advanced Composite Materials and Structures written by George C. Sih and published by VSP. This book was released on 1987-12 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through interviews with people in the jobs we learn what their job involves. What types of food outlets, what qualities are needed in different jobs. Jobs looked at include: cook, chef, waitress, waiter, counter attendant, short order cook, hostess, etc.
Download or read book Experimental Investigation of Moisture and Temperature Conditioning of C600 5280 Graphite epoxy Composite Material written by Kenneth Allen Grieger and published by . This book was released on 1979 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1982 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1982 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composite Material Response written by George C. Sih and published by Springer. This book was released on 1988-11-30 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop on Composite Material Response: Constitutive Relations and Damage Mechanisms, held at the Stakis Grosvenor Hotel, Glasgow, UK, 30-31 July 1987
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1984-10 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Quality Control Variables on Failure of Graphite epoxy Under Extreme Moisture Conditions written by and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1984 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Note written by and published by . This book was released on 1983 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Role of Fracture Mechanics in Modern Technology written by George C. Sih and published by North Holland. This book was released on 1987 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composite Structures written by Peter Grant and published by ASTM International. This book was released on 2000 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the May 1999 symposium from which these 29 papers were drawn was to bring together practitioners and theoreticians in the composite structural mechanics field to better understand the needs and limitations each group works with. Papers are organized under seven general headings: str
