Scholarlink

<p>In this study, the stress transfer behaviors of poly(<i>L</i>-lactic acid) (PLLA)/hydroxyapatite (HAp) composites during tensile tests were investigated by in situ synchrotron X-ray diffraction. When tensile stress was applied to the composite, a diffraction peak assigned to the (211) plane of HAp shifted to a lower angle, and the stress was transferred through the interface between the PLLA matrix and HAp fillers. The stress distributed to the HAp fillers was several times greater than the applied stress. The dependence of the stress transfer on the fraction ratio of the HAp filler to the filler size was attained. Furthermore, the correlation between the macroscopic mechanical properties and stress transfer behaviors of the composites during tensile deformation and fracture was revealed using in situ X-ray diffraction measurements with synchrotron radiation. At the yielding points, interfacial failure between PLLA and HAp was determined. In situ X-ray diffraction measurements were shown to be reliable and provided a practical analysis method to obtain an understanding of the dynamic process of the mechanical deformation of composites.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Stress transfer analyses of poly(L-lactic acid)/hydroxyapatite composites by synchrotron radiation

  • 期刊论文

  • 发表日期：

    2025年2月26日

查看全文
  • Chenyue He,
  • Takuya Matsumoto,
  • Takashi Nishino

摘要

In this study, the stress transfer behaviors of poly(L-lactic acid) (PLLA)/hydroxyapatite (HAp) composites during tensile tests were investigated by in situ synchrotron X-ray diffraction. When tensile stress was applied to the composite, a diffraction peak assigned to the (211) plane of HAp shifted to a lower angle, and the stress was transferred through the interface between the PLLA matrix and HAp fillers. The stress distributed to the HAp fillers was several times greater than the applied stress. The dependence of the stress transfer on the fraction ratio of the HAp filler to the filler size was attained. Furthermore, the correlation between the macroscopic mechanical properties and stress transfer behaviors of the composites during tensile deformation and fracture was revealed using in situ X-ray diffraction measurements with synchrotron radiation. At the yielding points, interfacial failure between PLLA and HAp was determined. In situ X-ray diffraction measurements were shown to be reliable and provided a practical analysis method to obtain an understanding of the dynamic process of the mechanical deformation of composites.