Explain the concept of fracture toughness and its importance in material design?
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Explain the concept of fracture toughness and its importance in material design?
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- Explain the process of 'cracking' and discuss why it is done.How does the Elastic rebound results?please answer these two question 1.Explain the reason that flexural modulus of elasticity and compression test modulus of elasticity must be considered separately when both the flexural test and the parallel to grain compressive test caused normal stresses parallel to the grain of the wood. 2. Discuss the difference between isotropic and orthotropic materials for wood.
- How do all stabilizing techniques increase the strength of aggregate??A tensile test specimen having a diameter of 10 mm and a gage length of 50 mm was tested to fracture. Thestress-strain curve from the tension test is shown below. The lower plot is the expanded region OAB andassociated with the strain values given in the lower scale.Showing your points and construction on graphs and the associated calculations, determine the followingquantities(a)Proportional limit: ___________________________(b)Rupture stress: ___________________________(c)Secant modulus at stress level of 420 MPa: _____________ (d)Tangent modulus at stress level of 420 MPa: _____________(e)Determine the plastic strain at stress level of 420 MPa: _____________________________(f)If the shear modulus of the material is 55GPa, determine thePoisson’s ratio assuming the material is isotropic._____________________________(g)Determine the axial force acting on the specimen when it isextended by 0.2 mmDiscuss the factors affecting the creep resistance of materials?
- Explain the difference between impact toughness and tensile toughness. Explain why the toughness measured via a tensile test may not correlate with the toughness measured via an impact test.Explain how a data model may improve upon the industry-standard method for predicting strength.In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?