Phase Field Modeling of Fracture in Rubbery and Glassy Polymers at Finite Thermo-Viscoelastic Deformations Lisa-Marie Sch¨ anzel X x ϕ t B S Γ Γ l η ˙ d = (1 − d)H− [d − l 2 Δd] with H = max s∈[0,t] ∑ a 〈σ a /σ c 〉 2 − 1 Bericht Nr.: I-31 (2015) Institut f¨ ur Mechanik (Bauwesen), Lehrstuhl I Professor Dr.-Ing. C. Miehe Stuttgart 2015