This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on May 1, 2003. The length of the article is 2725 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: The most commonly accepted method of determining impact fracture toughness of polymeric materials that exhibit small scale yielding and negligible influence of dynamic effects is given by the ISO/DIS 17281 Standard, which states that for brittle behavior, basically a linear relationship exists between the fracture energy, U, and the energy calibration factor, [empty set]. This relationship allows calculation of the critical strain energy release rate, [G.sub.IC], from the slope of the U vs. BW[empty set] plot. This paper describes a simpler alternative methodology capable of evaluating impact fracture toughness using the [J.sub.c] parameter. The J-integral is evaluated at the instability load point, by calculating the fracture energy required to produce cleavage behavior of a pre-cracked specimen. The methodology is limited to single edge notched three-point-bending specimens with a crack to depth ratio equal to 0.5. Tests were carried out on an instrumented falling weight impact testing machine on the follow ing materials: PP (polypropylene), HDPE (high-density polyethylene), MDPE (mid-density polyethylene) and RT-PMMA (rubber toughened polymethylmetaciylate). Results are in excellent agreement with the critical values determined by the ISO/DIS 17281 Standard.
Citation Details
Title: Evaluation of impact fracture toughness of polymeric materials by means of the J-integral approach.
Author: Laura A. Fasce
Publication:Polymer Engineering and Science (Refereed)
Date: May 1, 2003
Publisher: Society of Plastics Engineers, Inc.
Volume: 43 Issue: 5 Page: 1081(15)
Distributed by Thomson Gale
