Which of the following statements about warp angle is not true?
(a) It is a not applicable for tria elements
(b) It is an angle formed between two normal of planes formed by splitting quad element along diagonal
(c) Its value should be less than 10°
(d) It is the minimum angle between the planes of diagonally split quad element
This question was posed to me during an online interview.
My doubt stems from Conjugate Gradient Implementation of Quadrilateral Element topic in chapter Two Dimensional Isoparametric Elements and Numerical Integration of Finite Element Method