Scholarlink

<p>The nanoindentation creep behavior of biaxially oriented polyamide 6 (BOPA6) films was investigated using the nanoindentation testing technique under different loading rates and peak loads (holding loads) at room temperature. The results show that with an increase in loading rate, the creep platform of BOPA6 films significantly expands, and the indentation depth also increases significantly under the same load, indicating that the softening phenomenon of the film is more pronounced at high loading rates. To further investigate the micro-mechanical mechanism during the creep process, the stress variations were calculated using the indentation-work method, and fitting analyses of the stress-time curves were performed based on the extended exponential equation (Kohlrausch–Williams–Watts, KWW), the activation volume formula, and the fractional Kelvin model, which revealed the evolution patterns of microscopic heterogeneity, rheological units, relaxation time spectrum, and activation energy spectrum during the creep process.</p> Graphical abstract <p></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

Investigation on the nano-indentation creep behavior of BOPA6 film based on fractional rheological model

  • 期刊论文

  • 发表日期：

    2025年8月26日

查看全文
  • Bowen Li,
  • Guangkai Liao,
  • Kaikai Cao,
  • Zhenyan Xie,
  • Bin Li,
  • Zili Wang,
  • Yuejun Liu

摘要

The nanoindentation creep behavior of biaxially oriented polyamide 6 (BOPA6) films was investigated using the nanoindentation testing technique under different loading rates and peak loads (holding loads) at room temperature. The results show that with an increase in loading rate, the creep platform of BOPA6 films significantly expands, and the indentation depth also increases significantly under the same load, indicating that the softening phenomenon of the film is more pronounced at high loading rates. To further investigate the micro-mechanical mechanism during the creep process, the stress variations were calculated using the indentation-work method, and fitting analyses of the stress-time curves were performed based on the extended exponential equation (Kohlrausch–Williams–Watts, KWW), the activation volume formula, and the fractional Kelvin model, which revealed the evolution patterns of microscopic heterogeneity, rheological units, relaxation time spectrum, and activation energy spectrum during the creep process.

Graphical abstract