Design for Creep

Abstract

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A study on the evolution of the contact angle of small punch creep test of ductile materials

“…In a uniaxial creep test, damage occurs only in the tertiary creep region [35][36][37], while during a small punch creep test the material is subjected to damage in both the primary and secondary regions of the creep curve as well as in the tertiary region [20,24]. Damage can be described as the ratio between the damaged area and the initial area.…”

“…Table 1 and Table 2 show, respectively, the chemical composition, in wt%, of the P91 steel used for the investigation in ref. [36] and the material constants of the P91 steel at 650 °C for the damage law [25].…”

Study of Time-Dependent Properties of Thermoplastics

“…This model contains the total strain (α = 1) as well as the time hardening (α = 0) theories [5]. The simplest expression for the function λ(t) is λ(t) = e t g , and the common BaileyNorton function is obtained.…”

Creep‐fatigue analysis of the steel AISI type 316 component failure

“…• C. Referring to [11] the damage evolution equation caused by low-cycle fatigue is introduced similarly to (2): …”

“…• C. Referring to [11] the damage evolution equation caused by low-cycle fatigue is introduced similarly to (2): where the dependence for number of cycles to failure N * (∆ε, T ) describes the S-N diagrams; and ∆ε eff is an effective strain range, where the effective strain ε eff is defined as the maximum absolute value of principal strains multiplied by the algebraic sign of the dominant component within the one loading cycle in the following form:…”