Scholarlink

<p>The objective of this study is to investigate the shear strength performance of additively manufactured bio-composite PLA sustainable adhesive bond joints. Adhesively bonded joints are more susceptible to damage in the overlap area because of the high bonding stress. To overcome the challenges, various types of joint configurations, including scarf, modified scarf, and tapered single lap joints, was utilized to produce strengthened single lap joints. Moreover, to produce sustainable PLA composite single-adhesive joints, various concentrations (0.5, 1, and 1.5 wt%) of ramie fiber cellulose particles were blended with PLA materials for sustainable engineering applications. The two-step surface treatments were performed on ramie fiber to increase its interfacial strength with PLA materials. Tensile tests with acoustic emission (AE) and Weibull analysis were employed to evaluate the shear strength, damage, and reliability of adhesively bonded joints. The surface morphology and molecular interaction properties of blended PLA composites were assessed using field emission scanning electron microscopy (FESEM) with energy dispersive X-ray analysis (EDAX) and Fourier transform infrared spectroscopy (FTIR). Experimental results indicated that the shear strength of the modified scarf single lap joint was increased by 45% and 56% compared with scarf and tapered joints, respectively. The Weibull modulus of PLA/1 wt% ramie in modified scarf joints increased by 13.6% and 40.9% as compared to scarf and tapered joints, respectively. Additionally, AE studies have demonstrated that fiber-tear and light-tear failures are the major damaging failures in PLA composite adhesive-bonded joints. Moreover, failure analysis has been evaluated for all the joints by using optical microscopy (OM) analysis.</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

Acoustic emission monitoring of 3D printed bio-composite adhesive joints using treated ramie–PLA blends for sustainable engineering applications

  • 期刊论文

  • 发表日期：

    2026年2月13日

查看全文
  • N. Ramasamy,
  • M. Prakash,
  • S. Rajkumar,
  • T. Arunkumar,
  • A. Thejesh,
  • R. Abinash

摘要

The objective of this study is to investigate the shear strength performance of additively manufactured bio-composite PLA sustainable adhesive bond joints. Adhesively bonded joints are more susceptible to damage in the overlap area because of the high bonding stress. To overcome the challenges, various types of joint configurations, including scarf, modified scarf, and tapered single lap joints, was utilized to produce strengthened single lap joints. Moreover, to produce sustainable PLA composite single-adhesive joints, various concentrations (0.5, 1, and 1.5 wt%) of ramie fiber cellulose particles were blended with PLA materials for sustainable engineering applications. The two-step surface treatments were performed on ramie fiber to increase its interfacial strength with PLA materials. Tensile tests with acoustic emission (AE) and Weibull analysis were employed to evaluate the shear strength, damage, and reliability of adhesively bonded joints. The surface morphology and molecular interaction properties of blended PLA composites were assessed using field emission scanning electron microscopy (FESEM) with energy dispersive X-ray analysis (EDAX) and Fourier transform infrared spectroscopy (FTIR). Experimental results indicated that the shear strength of the modified scarf single lap joint was increased by 45% and 56% compared with scarf and tapered joints, respectively. The Weibull modulus of PLA/1 wt% ramie in modified scarf joints increased by 13.6% and 40.9% as compared to scarf and tapered joints, respectively. Additionally, AE studies have demonstrated that fiber-tear and light-tear failures are the major damaging failures in PLA composite adhesive-bonded joints. Moreover, failure analysis has been evaluated for all the joints by using optical microscopy (OM) analysis.