Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Patrick S. Leevers"'
Autor:
Patrick S. Leevers, Daniel Plant
Publikováno v:
Polymer Engineering & Science. 60:1546-1555
The rigid cellular materials widely used for personal impact protection can be effective but tend to be inconveniently thick, and to be less effective after a first impact. A macroscopically structured panel material, molded as a two‐dimensional ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f34e28d17bfb5241afa0c89272be016
https://doi.org/10.1002/pen.25400
https://doi.org/10.1002/pen.25400
Publikováno v:
Polymer Engineering & Science. 57:458-463
Rapid crack propagation (RCP) resistance of bilayered pipes consisting of a polyethylene core and a polypropylene skin was investigated using the ISO 13477 Small Scale Steady State “S4” test. It was found that bilayered pipes met all the RCP requ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f20f98d41c82c550339a80965e779ee5
https://doi.org/10.1002/pen.24442
https://doi.org/10.1002/pen.24442
Autor:
James G. Williams, D.R. Moore, Z. Major, Patrick S. Leevers, Andrea Pavan, A. Rager, I. Horsfall
Publikováno v:
Polymer Testing. 33:79-87
To support the selection of polymers for applications subject to impact, industry needs an international standard method for evaluating high-rate fracture resistance. As another step towards establishing one, three generic thermoplastics were tested
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d903a115946fc248833439e343184082
https://doi.org/10.1016/j.polymertesting.2013.11.005
https://doi.org/10.1016/j.polymertesting.2013.11.005
Autor:
Patrick S. Leevers
Publikováno v:
Engineering Fracture Mechanics. 96:539-557
The appearance of new pipe materials has revived interest in the modelling of rapid crack propagation (RCP) along fluid-pressurized plastic pipelines. The correlation of results from two International Standard RCP test methods—one full-scale and pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d4c82c3c3139a6435cae0e89f4abfef
https://doi.org/10.1016/j.engfracmech.2012.09.001
https://doi.org/10.1016/j.engfracmech.2012.09.001
Publikováno v:
Polymer Engineering & Science. 53:1217-1222
Pipe extruded from polyethylene of strength class PE100 was tested using the ISO 13477 Small Scale Steady State ‘‘S4’’ method, to investigate the effect of frozen-in stress on rapid crack propagation (RCP). It was found that the lower the res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e52dd8ee3eb5b4df71dae70627f6355e
https://doi.org/10.1002/pen.23381
https://doi.org/10.1002/pen.23381
Publikováno v:
NDT & E International. 51:101-110
A general model for NDE inspection techniques that predicts the probability of missing critical defects and misclassifying harmless defects has been developed. The model is exercised for the quantification of risks involved in v-butt weld measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1df541644c86d480bd23eaf92f2f50f
https://doi.org/10.1016/j.ndteint.2012.04.003
https://doi.org/10.1016/j.ndteint.2012.04.003
Autor:
Patrick S. Leevers, Pemra Ozbek
Publikováno v:
Polymer Engineering & Science. 48:1855-1861
Developers of polyethylene grades for pressure pipe seek a deeper understanding of the resistance of these materials to high rate, plane-stress fracture. The Reversed Charpy and ASTM F 2231 “Thin Charpy” test methods are designed to index this pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f4871d3a8f73a20ba144badcfa94097
https://doi.org/10.1002/pen.21159
https://doi.org/10.1002/pen.21159
Autor:
Pamela L. Maeger, Patrick S. Leevers, Mark J. Lamborn, Rajendra K. Krishnaswamy, Ashish M. Sukhadia, D.F. Register
Publikováno v:
Polymer Engineering & Science. 46:1358-1362
The influence of molecular architecture on the rapid crack propagation (RCP) resistance of a wide variety of high-density polyethylene pipes was investigated. It was concluded that high molecular weight, high crystallinity and a relatively narrow mol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::deb70177103a4fcc20d6a1408cf2c44e
https://doi.org/10.1002/pen.20582
https://doi.org/10.1002/pen.20582
Autor:
L. Moreno, Patrick S. Leevers
Publikováno v:
Engineering Fracture Mechanics. 72:947-959
A tough thermoplastic polymer may show a transition to brittle behaviour when a skin of different properties forms on, or is painted or bonded onto, its free surfaces. A small-scale yielding, linear elastic analysis of the core material, in combinati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86c971af7fac66a24feec4879aa41f4a
https://doi.org/10.1016/j.engfracmech.2004.01.014
https://doi.org/10.1016/j.engfracmech.2004.01.014
Autor:
Patrick S. Leevers, Alexis Paizis
Publikováno v:
Polymer Engineering & Science. 45:596-605
The effects of orientation by plastic strain on the impact fracture resistance of a pipe-grade polyethylene have been investigated. Isotropic samples of bulk polymer were subjected, by plane-strain compression, to uniform Hencky strains of up to ±40
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5947101a7cc66c2eb5e293416aab5d1
https://doi.org/10.1002/pen.20294
https://doi.org/10.1002/pen.20294