ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hits 1 - 3 | 3 hits

Sorting

Electronic Resource

A simplified determination of theJ-integral for paper (1993)

Yuhara, T. ; Kortschot, M. T.

Springer

Journal of materials science 28 (1993), S. 3571-3580

add to mindlist on the mindlist

Details

ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract A novel, simplified, method for evaluating theJ-integral for paper sheets has been developed. The inaccuracy of the single-specimen method (proposed by Riceet al. [8]), when applied to the fracture toughness testing of paper, was found to result from an erroneous assumption about the relationship between the load and the displacement due to plasticity. A new method was developed theoretically; it is based on a modified assumption about this relationship. Using this method, theJ-integral can be evaluated with a single load-displacement curve together with a new parameter that must be separately evaluated using at least one additional specimen. Although the new method requires a minimum of two notched specimens, it provides more flexibility than previous modifications of the single-specimen method. The experimental study indicated that the present method yields values ofJ c (the critical value of theJ-integral) which agree very closely with those obtained using the cumbersome multiple-specimen method, and is therefore more suitable for paper testing than other methods presently available.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01159839

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

The production and properties of oriented polypropylene laminates (1994)

Chen, H. J. ; Kortschot, M. T. ; Leewis, K. G.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 34 (1994), S. 1016-1024

add to mindlist on the mindlist

Details

ISSN: 0032-3888

Keywords: Chemistry ; Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: The mechanical properties of isotactic polypropylene can be enhanced in one direction by a combination of rolling and drawing in a rolling mill. The longitudinal strength and modulus of the oriented polypropylene (OPP) increases with an increase in draw ratio; however, the transverse properties remain relatively unchanged. In this study, multidirectional OPP laminates [with (0)2, (0/90)s and (0/±45)s lay-ups] were made to obtain sheet materials with improved properties in more than one direction in the plane. A hot-plate welding technique was used to produce these translucent and recyclable laminates. The in-plane properties of the laminates were successfully predicted with classical laminate theory (CLT), which is commonly used to predict the properties of fiber reinforced materials. These laminates can be quasi-isotropic and were found to have improved modulus [up to 6 GPa for (0/90)s laminates] and strength [up to 150 MPa for (0/90)s laminates] as well as exceptionally good impact toughness.

Additional Material: 14 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/pen.760341211

Permalink