Rishi Raj

rishi.raj@colorado.edu

(updated Spring 2021)

** Jan 20: DNA Molecule**

Full Publication from which above is extracted

** Jan 24: Youngs Modulus and Density Map**

The Elastic Modulus and Density Map

** Jan 27: Problems Related to the Periodic Table, the orbitals and electronegativity**

** Feb 06: Problems Related to Elastic Modulus and Bond Energy**

** Feb 15: Problems Related to the Elastic Constants**

** Feb 22: Problems Related to Principal Stresses and Strains**

HW 06 Principal Stresses and Strains

** Problems Related to Elastic Properties of Composites**

** Take Home Exam 1: Elastic Deformation**

Take Home Exam HW-09: Assigned Mar 01 due by email on or before Mar 15

Solutions to the first Take Home Exam

** Problem Related to Slip Plane and Slip Direction**

HW 08 Critial Resolved Shear Stress in the Slip Plane and the Slip Direction

** Problem Related to the shape of the shear displacement curve**

HW 09: Sinusoidal Shape for Ideal Yield Stress Analysis

** Problems Related to the Crystallography of Slip Systems**

HW 10: Multiplicity of the Most Favored Slip Systems

** Problems Related to the Force on a Dislocation**

HW 11/12: Force on a meandering dislocation lying in the slip plane

** Problem Related to the Curvature on a Dislocation Segment**

HW 13: The Radius of Curvature in a Dislocation Segment under Applied Shear Stress

** Take Home Exam II: Plastic Deformation**

Take Home Exam II: Assigned Mar 23 due April 05

Solutions to Take Home Exam on Plasticity

** Problem Related to the Measurement of the Fracture Energy from the Change in Compliance with the flaw size in a specimen: the case of a double cantilever beam specimen**

HW 15: Double Cantilever Beam Specimen for Fracture Measurement

** Problem Related to Fracture Toughness as a Material Parameter**

HW 16: Fracture Toughess, Work of Fracture and Stress Intensity Factor

** Problem Related to Fracture Toughness of Glass seen from the events at the crack tip**

HW 17: Fracture Toughess calculated from a displacement criterion near the crack tip

** Problem Related to CTOD and the Plastic Zone Size**

HW 18: Fracture Toughess calculated from CTOD and its Relationship to the Plastic Zone Size

** Take Home Exam III: Fracture**

HW 19 - Take Home Exam III: Assigned Wed Apr 14 due Fri April 23

HW 19 - Take Home Exam III: Solutions

** Take Home Exam IV: High Temperatures**

HW 21 - Take Home Exam IV High Temperature: Apr 28 due Fri May 07

Take Home Exam IV High Temperature: Solutions