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Acta Mechanica Solida Sinica

, Volume 30, Issue 4, pp 425–434 | Cite as

The microbuckling failure of Dyneema® composites under compression

  • Guangyan Liu
  • Wei Zhu
  • Guangyan Huang
Article

Abstract

Two grades of Dyneema® composite laminates with the commercial designations of HB26 and HB50 were cut into blocks with or without an edge crack and compressed in the lon-gitudinal fiber direction. The cracked and uncracked specimens show similar compressive responses including failure pattern and failure load. The two grades of Dyneema® composites exhibits different failure modes: a diffuse, sinusoidal buckling pattern for Dyneema® HB50 due to its weak matrix constituent and a kink band for Dyneema® HB26 due to its relatively stronger matrix constituent. An effective finite element model is used to simulate the collapse of Dyneema® composites, and the sensitivity of laminate compressive responses to the overall effective shear modulus, interlaminar shear strength, thickness and imperfection angle are investigated. The change of failure mode from kink band to sinusoidal buckling pattern by decreasing the interlaminar shear strength is validated by the finite element analyses.

Keywords

Ultra-high molecular-weight polyethylene Microbuckling Cohesive Finite element analysis Compression 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2017

Authors and Affiliations

  1. 1.School of Aerospace EngineeringBeijing Institute of TechnologyBeijingChina
  2. 2.School of Mechatronical EngineeringBeijing Institute of TechnologyBeijingChina

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