scholarly journals Measurements of Mode I Interlaminar Properties of Carbon Fiber Reinforced Polymers Using Digital Image Correlation

2017 ◽  
Vol 742 ◽  
pp. 652-659
Author(s):  
Matthias Merzkirch ◽  
Louise Ahure Powell ◽  
Tim Foecke
Keyword(s):  
Carbon Fiber ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Measured Data ◽  
Image Correlation ◽  
Fiber Reinforced Polymers ◽  
Mode I ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers

Numerical models based on cohesive zones are usually used to model and simulate the mechanical behavior of laminated carbon fiber reinforced polymers (CFRP) in automotive and aerospace applications and require different interlaminar properties. The current work focuses on determining the interlaminar fracture toughness (GIC) under Mode I loading of a double cantilever beam (DCB) specimen of unidirectional CFRP, serving as prototypical material. The novelty of this investigation is the improvement of the testing methodology by introducing digital image correlation (DIC) as an extensometer and this tool allows for crack growth measurement, phenomenological visualization and quantification of various material responses to Mode I loading. Multiple methodologies from different international standards and other common techniques are compared for the determination of the evolution of GIC as crack resistance curves (R-curves). The primarily metrological sources of uncertainty, in contrast to material specific related uncertainties, are discussed through a simple sensitivity analysis. Additionally, the current work offers a detailed insight into the constraints and assumptions to allow exploration of different methods for the determination of material properties using the DIC measured data. The main aim is an improvement of the measurement technique and an increase in the reliability of measured data during static testing, in advance of future rate dependent testing for crashworthiness simulations.

Research in Recycling Technology of Fiber Reinforced Polymers for Reduction of Environmental Load: Optimum Decomposition Conditions of Carbon Fiber Reinforced Polymers in the Purpose of Fiber Reuse

2011 ◽  
Vol 343-344 ◽  
pp. 142-149 ◽  
Author(s):  
Jian Shi ◽  
Kiyoshi Kemmochi ◽  
Li Min Bao
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Superheated Steam ◽  
Fiber Reinforced Polymers ◽  
Environmental Load ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced ◽  
Recycled Fibers

The objective of the present study is to investigate the effect of pyrolysis time and temperature on the mechanical properties of recycled carbon fiber, based on tensile strength measurements, determining the optimum decomposition conditions for carbon fiber-reinforced polymers (CFRPs) by superheated steam. In this research, CFRPs were efficiently depolymerized and reinforced fibers were separated from resin by superheated steam. Tensile strength of fibrous recyclates was measured and compared to that of virgin fiber. Although tensile strength of recycled fibers were litter lower than that of virgin fiber, under some conditions tensile strength of recycled fibers were close to that of virgin fiber. With pyrolysis, some char residue from the polymer remains on the fibers and degrees of char on the recycled fibers were closely examined by scanning electron microscopy.

Carbon fiber reinforced polymers for implantable medical devices

Biomaterials ◽  
2021 ◽  
pp. 120719
Author(s):  
Corrine Ying Xuan Chua ◽  
Hsuan-Chen Liu ◽  
Nicola Di Trani ◽  
Antonia Susnjar ◽  
Jeremy Ho ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Medical Devices ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Implantable Medical Devices ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced
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