Calculator Introduction 
For isotropic materials, only two independent elastic constants are needed for describing the stressstrain relationship, i.e., Hooke's Law.
This calculator computes the interrelations among the 5 commonly used elastic constants: 
Symbol  Name  Other Names 
E  Youngs modulus  Elastic modulus, tension modulus 
n  Poisson ratio  
G or m  Shear modulus  Rigidity modulus, 2nd Lamé constant 
K  Bulk modulus  Compression modulus 
l  1st Lamé constant 
Select 2 constants for input, and calculate the rest.  
Table of Relations among Elastic Constants  
The relationships amongst the 5 elastic constants are shown in the table below.
 
 
For the case of {E, l} input, the factor R is defined as,
The 2^{nd} Law of Thermodynamics requires that the following limits hold on the elastic constants,
E, G, and K > 0
