<p>Hybrid glass fiber-reinforced polymer (GFRP) materials find a wide range of applications in the automobile, aerospace, construction, structure, shipbuilding, and spacecraft industries. These materials are extremely difficult to machine with conventional methods. Laser engraving is one of the latest non-conventional methods to machine hybrid GFRP. Here in hybrids, GFRP was fabricated by the addition of epoxy/10%Al<sub>2</sub>O<sub>3</sub> GFRP, epoxy/10%TiO<sub>2</sub> GFRP, and epoxy/10%SiO<sub>2</sub> GFRP as reinforcements. After the successful fabrication, GFRPs were machined using an in-house developed 15-W diode laser engraving machine (LEM). For experimentation, laser power and scanning speed were selected as input parameters, whereas material removal rate (MRR) and average surface roughness (<i>R</i><sub><i>a</i></sub>) were taken as output responses. One-factor-at-a-time approach was selected to study the effect of input parameters on output responses. It has been observed the continuous improvement in MRR with the increase in laser power and scanning speed. Moreover, average surface roughness increases with increased laser power but decreases with increased scanning speed. Scanning electron microscopic (SEM) was carried out to analyze the kerf width. SEM analysis reveals that microcracks, globules of debris, and striations are present in machined samples. In addition, laser engraving mechanical testing (tensile, flexural, microhardness) of the prepared materials was also studied. To co-relate the structural property relationship fractography was also studied.</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

Investigations on Machining of Hybrid Glass Fiber-Reinforced Polymer Using Laser Engraving Machine

  • Rahul Mehra,
  • Sachin Mohal,
  • Harvinder Singh,
  • Sujeet Kumar Chaubey

摘要

Hybrid glass fiber-reinforced polymer (GFRP) materials find a wide range of applications in the automobile, aerospace, construction, structure, shipbuilding, and spacecraft industries. These materials are extremely difficult to machine with conventional methods. Laser engraving is one of the latest non-conventional methods to machine hybrid GFRP. Here in hybrids, GFRP was fabricated by the addition of epoxy/10%Al2O3 GFRP, epoxy/10%TiO2 GFRP, and epoxy/10%SiO2 GFRP as reinforcements. After the successful fabrication, GFRPs were machined using an in-house developed 15-W diode laser engraving machine (LEM). For experimentation, laser power and scanning speed were selected as input parameters, whereas material removal rate (MRR) and average surface roughness (Ra) were taken as output responses. One-factor-at-a-time approach was selected to study the effect of input parameters on output responses. It has been observed the continuous improvement in MRR with the increase in laser power and scanning speed. Moreover, average surface roughness increases with increased laser power but decreases with increased scanning speed. Scanning electron microscopic (SEM) was carried out to analyze the kerf width. SEM analysis reveals that microcracks, globules of debris, and striations are present in machined samples. In addition, laser engraving mechanical testing (tensile, flexural, microhardness) of the prepared materials was also studied. To co-relate the structural property relationship fractography was also studied.