Korea University · Engineering
Professor Byoung-Ho Choi's research lab specializes in the mechanical behavior and durability of engineering polymers and metallic materials, with a focus on fatigue crack growth, environmental stress cracking, and fracture mechanics. The lab investigates the effects of processing parameters, material cleanliness, and microstructural features on the fatigue life and failure resistance of high-density polyethylene, aluminum alloys, and polymer composites. Using advanced characterization techniques and fracture mechanism maps, the lab aims to develop predictive models for material performance under service conditions.
Figures are computed from collected data and may differ slightly.
Abstract In the case of high density polyethylene (HDPE), the fatigue crack propagates in a discontinuous manner, which can be observed by distinct striations. In this article, fatigue crack growth (FCG) experiments were conducted on two grades of HDPE pipe with compact‐tension (CT) and cracked round bar (CRB) specimens. The effects of the stress ratio (R‐ratio) which is defined as the ratio of minimum stress and maximum stress of fatigue loadings and the frequency on FCG behavior were experimen
Abstract Environmental stress crack resistance (ESCR) is a commonly used test to characterize cracking failure of high‐density polyethylene in applications such as wires, cables, blow molded containers, and other rigid packaging applications. From a resin design standpoint, it is important to understand the mechanism of environmental stress cracking especially in the case of materials with significantly different ESCR values. Currently, two standard ESCR tests, ASTM D1693 and ASTM F2136, are com
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