Tensile and compressive strain evolutions of bovine compact bone under four-point bending fatigue loading

Xianjia Meng, Qinghua Qin, Chuanyong Qu*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Bones are biological composite materials with multiscale structures. Bone fatigue damage is commonly characterized by an increase in strain that is accompanied by microdamage at different scales. This study investigated the damage evolutions of bone specimens under four-point bending fatigue loading using neutral axis migration. Tensile and compressive strains during the fatigue process were simultaneously measured using a digital image correlation technique. The compressive strain of the bone specimen increased rapidly at first and then proceeded slowly while the tensile strain decreased during fatigue loading. Consequently, the neutral axis shifted downward as the damage accumulated. A positive correlation exists between the downward offset of the neutral axis and the number of cycles. The variation in compressive strain is larger than that in tensile strain in this situation.

    Original languageEnglish
    Article number104774
    JournalJournal of the Mechanical Behavior of Biomedical Materials
    Volume123
    DOIs
    Publication statusPublished - Nov 2021

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