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Article
Publication date: 16 August 2019

Peng Zhang, Zhichao Hu, Huanxiong Xie, Gwang-Hee Lee and Chul-Hee Lee

This paper aims to study the different infill, printing direction against sliding direction and various load condition for the friction and wear characteristics of polylactic acid…

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Abstract

Purpose

This paper aims to study the different infill, printing direction against sliding direction and various load condition for the friction and wear characteristics of polylactic acid (PLA) under reciprocating sliding condition.

Design/methodology/approach

The tests were performed by applying the load of 1, 5, 15 and 10 N with sliding oscillation frequency of 10 Hz for the duration of 10 min at room temperature.

Findings

The results show that the friction and wear properties of PLA specimen change with a different infill density of printed parts. The oscillation frequency is 10 Hz and the infill density of plate is 50 per cent that shows the best friction and wear properties.

Originality/value

The potential of this research work is to investigate the tribological characteristics of three-dimensional printing parts with different infill percentage to provide a reference for any parts in contact with each other to improve friction and wear performance. There will be many opportunities exist for further research and the advancement of three-dimensional printing in the field of tribology.

Details

Industrial Lubrication and Tribology, vol. 72 no. 4
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 1 February 2003

Sang T. Choe

After a half century in seclusion from the Western world, North Korea is in slow transition to an open market economy. This change presents oppor‐tunities to multinationals in…

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Abstract

After a half century in seclusion from the Western world, North Korea is in slow transition to an open market economy. This change presents oppor‐tunities to multinationals in the. Korean peninsula, the U.S. and elsewhere, but creates a dilemma for their government policymakers. North Korea is improving regional stability and has an affordable labor force that is attractive to contract manufacturers, retail goods importers, and large turnkey project contractors. The country holds a promising market, possesses abundant undeveloped natural resources, and offers a strategic location for transportation savings. The study stresses the significance of North Korea in the global marketplace.

Details

Competitiveness Review: An International Business Journal, vol. 13 no. 2
Type: Research Article
ISSN: 1059-5422

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Article
Publication date: 1 February 2002

Sang T. Choe and Kelly D. Huff

North Korea is moving in the direction of an open market as China did a generation ago. With a substantial population of 22 million, the country has abundant natural resources and…

309

Abstract

North Korea is moving in the direction of an open market as China did a generation ago. With a substantial population of 22 million, the country has abundant natural resources and an affordable labor force that are attractive to contract manufacturers, importers of retail goods, and contractors of large turnkey projects. North Korea's strategic location in the Far East offers enormous savings in transportation cost for multinational firms wishing to ship goods to Southeast Asia and Europe. Five reasons to do business with North Korea are analyzed in the report.

Details

International Journal of Commerce and Management, vol. 12 no. 2
Type: Research Article
ISSN: 1056-9219

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