Affiliation:
1. Shenyang Aerospace University, School of Mechanical Engineer
2. Shenyang Aerospace University, School of Aerospace Engineeri
Abstract
<div class="section abstract"><div class="htmlview paragraph">The aim of this research is to investigate the effect of cutting temperature on
the post-machining performance of “carbon fiber-reinforced polymer” (CFRP),
providing insights into how temperature variations during machining influence
the material’s mechanical properties and structural integrity. First, cutting
temperatures generated during machining were monitored and used to categorize
specimens. These specimens were then subjected to control heating at various
temperatures, simulating the range of cutting conditions. Subsequently, the
heated specimens were left to cool naturally in ambient air. A comprehensive
tensile experiment was conducted on these specimens to assess the impact on
mechanical behavior. The tensile properties, including elastic modulus and
maximum tensile stress, were analyzed and compared across the different
temperature. This approach allowed for a systematic evaluation of cutting
temperature’s influence on CFRP’s post-machining performance, shedding light on
the material’s response to varying thermal conditions and its potential
implications for structural integrity. The results showed that temperature had a
significant influence on both the elastic modulus and maximum tensile stress of
the CFRP. The elastic modulus and ultimate tensile stress decreased with
increasing temperature. The elastic modulus and maximum tensile stress were the
lowest when the temperature was close to the glass transition temperature (Tg).
Therefore, the tensile properties of CFRP can be seriously damaged if the
material temperature is close to Tg and maintained there for a long time. The
cutting temperature should be kept away from Tg during machining. The research
outcomes promise to improve the machining practices and overall performance of
aerospace composite materials such as CFRP, contributing to more efficient,
cost-effective aerospace systems.</div></div>