International Journal Of Plasticity

International Journal of Plasticity (international-journal-of-plasticity)

Journal positioning

The International Journal of Plasticity (IJP) is a leading archival journal focused specifically on the theory and modeling of plastic deformation of solids: rate-dependent and rate-independent constitutive models, crystal plasticity, finite-deformation plasticity, and the coupling of plasticity with damage, fracture, and phase transformation. Unlike a broad solid-mechanics journal, IJP is plasticity-centric — its center of gravity is a new or improved constitutive description of inelastic behavior, formulated rigorously and validated against experiment. Papers that report a deformation observation with no constitutive contribution, or that apply an off-the-shelf plasticity model to one part with no modeling advance, are a weak fit. This skill is a fit / venue-selection / re-framing tool. It does not replace the journal's current official author guidelines. Before submitting, re-check the live IJP Guide for Authors.

When to trigger

• The author names IJP for a plasticity, crystal-plasticity, or inelastic-behavior manuscript and wants a fit/framing check.
• A paper must be re-framed from "we observed plastic deformation" into a constitutive-model contribution validated against data.
• The author is choosing between IJP (plasticity-centric, constitutive focus) and a broader fundamental-mechanics venue (journal-of-the-mechanics-and-physics-of-solids).
• The author needs IJP's constitutive-model rigor bar and desk-reject heuristics.

Scope & topic fit

• Phenomenological constitutive models of plasticity/viscoplasticity: rate-dependent and rate-independent flow rules, hardening laws, yield-surface evolution, anisotropy.
• Crystal plasticity: single-crystal and polycrystal models, slip/twinning kinematics, texture evolution, and grain-scale-to-macroscale linking.
• Finite-deformation and large-strain plasticity: kinematic decompositions, objective formulations, and their numerical implementation.
• Coupled plasticity: plasticity coupled with damage, ductile fracture, phase transformation, recrystallization, or thermomechanical effects.
• Gradient, size-dependent, and dislocation-based plasticity capturing length-scale effects with a constitutive contribution.
• Plasticity of advanced materials (high-entropy alloys, TWIP/TRIP steels, polymers, metallic glasses) when the advance is the constitutive model, not just the material.

Method & evidence bar

• The central object is a constitutive model of inelastic behavior — clearly formulated, thermodynamically and kinematically consistent, and physically motivated.
• Models must be validated against experimental data across more than one loading path or condition; fitting a single curve is not validation.
• Calibration and identification of parameters must be transparent: state the data, the procedure, and the predictive (not merely fitted) evidence.
• Numerical implementation, when central, must be verified (e.g., convergence, objectivity, consistency of the tangent) and clearly described.
• Position against the closest existing plasticity models: what behavior, coupling, or class of materials does the new model capture that prior ones do not.
• Reproducibility: report model equations, parameter values, loading protocols, and material/microstructure details sufficient to reproduce the predictions.

Structure & house style

• Standard full-length research-article structure; IJP publishes archival modeling papers — re-check article types on the live guide.
• The introduction motivates the constitutive gap (what inelastic behavior is not captured); the body develops the model, its identification, and its validation.
• Equations are central and must be self-consistent; use standard finite-deformation plasticity notation and define all internal variables.
• Figures carry the validation: model-vs-experiment overlays across loading paths, yield-surface/texture evolution, and parameter-sensitivity plots.
• Implementation details, derivations, and extended calibration go to appendices/supplementary material; the main text must establish the model and its predictive validity unaided.