マルコフ過程によるCFRP積層板トランスバースクラック飽和挙動の確率論的逆解析

  • 松田 伸也
    香川大学 創造工学部 創造工学科 材料物質科学領域
  • 上原 諒也
    香川大学大学院 工学研究科 博士前期課程 材料創造工学専攻
  • 合田 公一
    山口大学 工学部 機械工学科

書誌事項

タイトル別名
  • Stochastic Inverse Analysis of Transverse Crack Saturation Behavior in CFRP Laminate by Markov process

抄録

<p>It is well known that the transverse cracks (TCs) generated in CFRP laminates are saturated, and the number of saturated TCs varies widely. This paper presents a stochastic approach for the TC saturation characteristics cumulated in a CFRP cross-ply laminate under tensile loading. An inverse analysis mechanics model was proposed on the basis of Markov process combined with a matrix cracking model which was derived on the basis of slow crack growth (SCG) concept in conjunction with the Weibull distribution. The analysis model is assumed that each discrete stage is assigned in the order of the TCs generation, and that it transits to two states i.e., continuously generated and saturated states from one state. The saturated TCs data was stochastically analyzed using the analysis model. The estimated TC saturation probability curves approached the experimentally obtained saturation TCs data with an increase in the number of TCs and ultimately agreed with them. The measured and estimated mean number of saturated TCs was in good agreement.</p>

収録刊行物

  • 材料

    材料 73 (3), 263-268, 2024-03-15

    公益社団法人 日本材料学会

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