Q1/ Air craft component is fabricated from epoxy composites that have plane strain fracture toughness of (20 MPa m2). It has been determined that fracture results at a stress of (250 MPa) when the maximum (or critical) internal crack length is (3 mm). For the same component and part, will fracture occur at a stress level of (350 MPa) when the maximum internal crack length is (2 mm)? yes or not depending on your solution?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q1/ Air craft component is fabricated from epoxy composites that have plane
strain fracture toughness of (20 MPa m2). It has been determined that fracture
results at a stress of (250 MPa) when the maximum (or critical) internal crack
length is (3 mm). For the same component and part, will fracture occur at a
stress level of (350 MPa) when the maximum internal crack length is (2 mm)?
yes or not depending on your solution?
Q2/ Polymer (y) has possion ratio (0.33) it faced shearing forces leading to
change the shape of the polymer (y) sample. Where the dimensions of sample
are (h = 0.8 cm, x = 1 cm) and (Ax = 0.4 cm) and the shear force is 0.25 KN.
Calculate the elastic modulus and the bulk modulus?
Transcribed Image Text:Q1/ Air craft component is fabricated from epoxy composites that have plane strain fracture toughness of (20 MPa m2). It has been determined that fracture results at a stress of (250 MPa) when the maximum (or critical) internal crack length is (3 mm). For the same component and part, will fracture occur at a stress level of (350 MPa) when the maximum internal crack length is (2 mm)? yes or not depending on your solution? Q2/ Polymer (y) has possion ratio (0.33) it faced shearing forces leading to change the shape of the polymer (y) sample. Where the dimensions of sample are (h = 0.8 cm, x = 1 cm) and (Ax = 0.4 cm) and the shear force is 0.25 KN. Calculate the elastic modulus and the bulk modulus?
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