Abstract
The aim of this study was to show how temperature modifies the mechanical characteristics of the Cocos nucifera (CN) shells and the Canarium schweinfurthii (CS) cores. The test consisted in performing an instrumented macroindentation on prismatic specimens in an adiabatic chamber; the indentation carried out according to four temperature ranges (30 °C, 50 °C, 70 °C, 90 °C). The Oliver and Pharr method is used for the analysis of mechanical parameters in indentation: reduced Young’s modulus, hardness, creep coefficient. These parameters have enabled to estimate indirect characteristics such as toughness and ultimate mechanical stress to be obtained. The creep data are simulated to have the rheological model to these materials by considering the statistical criteria. As a global observation, when the temperature increases, the mechanical parameters decrease; although CN is more sensitive to the temperature gradient than CS, these 2 materials show performances that allow them to be classified as engineering polymer materials according to the Ashby diagram.
Highlights
Biomaterials are a class of materials comprising biofibres, biopolymers and bio-composites, the main components of which come from agriculture or the plant world, as products or wastes [1,2,3,4,5]
Natural biomaterials are among these new materials [23, 24], and due to their availability they are increasingly used in industry as secondary resources that can replace or supplement primary resources [25,26,27]: Cocos nucifera (CN) shells and Canarium schweinfurthii (CS) cores are among these bioresources which are available as waste in Cameroon, with an estimated volume around 2,000 tons [28]
Young’s modulus, creep coefficient and toughness Figure 6 shows the results of macroindentation with a maximum applied normal load of 500 N for temperature isotherms of 30, 50, 70 and 90 °C on CN and CS samples
Summary
Biomaterials are a class of materials comprising biofibres, biopolymers and bio-composites, the main components of which come from agriculture or the plant world, as products or wastes [1,2,3,4,5]. These materials have experienced a boom in recent years, regarding many issues such as reduction of plastic pollution, recycling, stiffness, lightweight, low cost, etc. Natural biomaterials are among these new materials [23, 24], and due to their availability they are increasingly used in industry as secondary resources that can replace or supplement primary resources [25,26,27]: Cocos nucifera (CN) shells and Canarium schweinfurthii (CS) cores are among these bioresources which are available as waste in Cameroon, with an estimated volume around 2,000 tons [28]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
