Article
  • Relationship between Residual Stress in the Surface of an Injection Molded Specimen and Chemical Crack
  • Woo JW, Lyu MY
  • 사출성형 시편 표면의 잔류응력과 케미컬 크랙과의 관계
  • 우정우, 류민영
Abstract
Residual stress in an injection molded product is originated from thermal induced residual stress and flow induced residual stress. It was verified that the residual stress near surface region is compressive stress through chemical cracking test with annealed injection molded specimen. The compressive residual stress acted as an affirmative part that giving resistance to chemical crack formation at the surface of the specimen. The compressive residual stress formed in the surface region of an injection molded product can also increase the resistance of crack that formed by an impact.

사출성형품의 잔류응력은 열에 의한 잔류응력과 흐름에 의한 잔류응력에 기인한다. 풀림 처리된 사출시편을 이용한 케미컬 크랙킹 실험을 통하여 시편표면의 잔류응력이 압축응력임을 확인할 수 있었다. 그리고 압축 잔류응력은 케미컬에 의한 표면의 크랙 형성에 저항하는 응력으로 작용하여 긍정적인 역할을 함을 알 수 있었다. 또한 사출성형품 표면에 형성된 압축 잔류응력은 충격에 의해 생성되는 크랙의 저항도 높일 수 있다고 판단된다.

Keywords: injection molding; residual stress; compressive residual stress; annealing; chemical cracking

References
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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2015; 39(5): 827-829

    Published online Sep 25, 2015

  • 10.7317/pk.2015.39.5.827
  • Received on Feb 23, 2015
  • Accepted on Mar 9, 2015