Problems 191 Tresca criterion ---von Mises criterion Fig.10.10.Two failure criteria for ductile homogeneous materials Problem 10.2 Repeat Problem 10.1 using the maximum strain failure theory instead of the maximum stress failure theory. Problem 10.3 Repeat Problem 10.1 using the Tsai-Hill failure theory instead of the maxi- mum stress failure theory. Problem 10.4 Repeat Problem 10.1 using the Tsai-Wu failure theory instead of the maxi- mum stress failure theory. MATLAB Problem 10.5 Use MATLAB to plot the four failure envelopes using the strengths given in Problem 10.1. Problem 10.6 Determine the maximum value of a>0 if stresses of o=30,oy=-20,and Ty=5a are applied to a 30-lamina of glass/epoxy.Use the maximum stress failure theory.The material properties of this lamina are given as follows:Problems 191 Fig. 10.10. Two failure criteria for ductile homogeneous materials Problem 10.2 Repeat Problem 10.1 using the maximum strain failure theory instead of the maximum stress failure theory. Problem 10.3 Repeat Problem 10.1 using the Tsai-Hill failure theory instead of the maxi￾mum stress failure theory. Problem 10.4 Repeat Problem 10.1 using the Tsai-Wu failure theory instead of the maxi￾mum stress failure theory. MATLAB Problem 10.5 Use MATLAB to plot the four failure envelopes using the strengths given in Problem 10.1. Problem 10.6 Determine the maximum value of α > 0 if stresses of σx = 3α, σy = −2α, and τxy = 5α are applied to a 30◦-lamina of glass/epoxy. Use the maximum stress failure theory. The material properties of this lamina are given as follows: