In the present work, improved version of LEFM formulas for stress intensity factor, crack mouth opening displacement and crack opening displacement profile presented in the recent research work are incorporated.
By means of three-point bending method, the fracture toughness, fracture energy, the ultimate deflection in span center, critical crack mouth opening displacement, critical crack tip opening displacement, maximum crack mouth opening displacement and maximum crack tip opening displacement of the specimen of CTCR reinforced with polypropylene fibers were measured respectively.
For a given value of critical crack mouth opening displacement CMODc, the crack opening displacement within the crack length COD x) is computed using the revised expression (Ince 2012) as given below.
The complete load-crack mouth opening displacement and load-crack tip opening displacement curves of the specimens were acquired.
The crack mouth opening displacement was monitored using a special displacement transducer.
The crack tip opening displacement (wI) is determined by post-processing displacements measured by DIC.
Uniaxial fatigue tension tests were conducted on pre-cracked specimens under deformation control with constant crack opening displacement amplitude.
Load vs. mid-span deflection (P-δ) curves, load vs. crack mouth opening displacement (P-CMOD) curves and load vs. crack tip opening displacement (P-CTOD) curves of the tested beams were obtained.
Crack mouth opening displacement at critical load.
Jaw protrusion is higher in limnetics, as are opercular four-bar transmission coefficent and lower jaw opening displacement advantage (Table 1).
Three types of displacements, including the Load-Line Displacement (LLD), Crack Mouth Opening Displacement (CMOD), and Crack Tip Opening Displacement (CTOD) were utilized to plot load-displacement curves and the corresponding fracture energies were calculated.
