先進複合材料の損傷許容性評価に関する研究 : 第1報, 層間破壊靱性試験方法に関する検討

概要

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Characterization of interlaminar fracture toughness will play an important role in the establishment of a damage-threshold/fail-safe approach to composite materials and structures. Double cantilever beam (DCB) and end notched flexure (ENF) tests are reviewed and revised methods are proposed for accurate and easy estimation of mode I and 11 interlaminar fracture toughness. Thickness normalized crack length versus cube root of compliance plots are used for data reduction of DCB test. CSD measurement technique is introduced to ENF test and stabilized ENF test is proposed. Mode II interlaminar fracture toughness can be estimated directly from load versus CSD diagram without measuring crack length. Applicability of proposed protocols are well confirmed by experiments of four kinds of carbon fiber composite systems, T300/2500, T800H/3631, APC-2 and Celion6000/PMR-15.
社団法人日本船舶海洋工学会の論文