Abstract. This work makes an attempt to study of fracture behaviour of hybrid Composite reinforced with hard ceramic Boron carbide as primary phase and secondary phase as soft solid lubricant Molybdenum Disulphide with base matrix Al2219 by two stage stir casting method is incorporated. Compact tension type specimen was utilized for test and dimensions are conformity to ASTM E-647.Fatigue crack growth and fracture toughness test conducted as per ASTM Standard E-399 and E-1820. This study discloses that reinforcing the hard ceramic Boron Carbide of constant 3wt% and soft solid lubricant Molybdenum Disulphide with increasing wt% of 3%, 4%, 5% to Al2219, results increase in energy required to open the crack front to create two new crack surfaces during mode-I type failure and also significantly variation of fracture toughness. Surface of fractured specimens were study under scanning electron microscope and observes that pulled regions tiny dimples results in balance between ductility and strength of prepared hybrid composite.
Abstract. This work makes an attempt to study of fracture behaviour of hybrid Composite reinforced with hard ceramic Boron carbide as primary phase and secondary phase as soft solid lubricant Molybdenum Disulphide with base matrix Al2219 by two stage stir casting method is incorporated. Compact tension type specimen was utilized for test and dimensions are conformity to ASTM E-647.Fatigue crack growth and fracture toughness test conducted as per ASTM Standard E-399 and E-1820. This study discloses that reinforcing the hard ceramic Boron Carbide of constant 3wt% and soft solid lubricant Molybdenum Disulphide with increasing wt% of 3%, 4%, 5% to Al2219, results increase in energy required to open the crack front to create two new crack surfaces during mode-I type failure and also significantly variation of fracture toughness. Surface of fractured specimens were study under scanning electron microscope and observes that pulled regions tiny dimples results in balance between ductility and strength of prepared hybrid composite.
The development of various flexible and stretchable materials has drawn in interest for promising applications in the biomedical field, such as health care monitoring, artificial intelligence, and wearable electronic skins. However, it’s still challenging to achieve tunable sensitivity and stretchable property based on particular application from large strain to small strain. Herein, we present interconnected nanocomposite PANI-CNT impregnated in polyurethane polymer. Filler materials PANI prepared by chemical oxidation method and CNTs are surface modified by acid oxidation method. Nanocomposite prepared by solvent-casting method using polyurethane polymer. Subsequent change of electrical behavior observed when concentration of PANI increased in nanocomposite. These prepared nanocomposites exhibit electrical conductivity and stretchability. Furthermore, nanocomposites are attached to the elbow and observe the change in bending movements of the elbow. Altogether, prepared PANI-CNT/PU nanocomposite can be assembled as e-skins for various purposes such as healthcare, human motion monitoring, and human-machine interface.
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