Package: FCGR
Title: Fatigue Crack Growth in Reliability
Version: 1.2-0
Authors@R: c(
    person("Antonio", "Meneses", email = "antoniomenesesfreire@hotmail.com", role = c("aut", "cre")),
    person("Salvador", "Naya", email = "salva@udc.es", role = "ctb"),
    person("Javier", "Tarrio-Saavedra", email = "jtarrio@udc.es", role = "ctb"),
    person("Ignacio", "Lopez-Ullibarri", email = "ilu@udc.es", role = "ctb"))
Description: Fatigue Crack Growth in Reliability estimates the
        distribution of material lifetime due to mechanical fatigue
        efforts. The 'FCGR' package provides simultaneous crack growth
        curves fitting to different specimens in materials under
        mechanical stress efforts. Linear mixed-effects models with
        smoothing B-Splines and the linearized Paris-Erdogan law are
        applied. Once defined the fail for a determined crack length,
        the distribution function of failure times to fatigue is
        obtained. The density function is estimated by applying
        nonparametric binned kernel density estimate ('bkde') and the
        kernel estimator of the distribution function ('kde'). The
        results of Pinheiro and Bates method based on nonlinear
        mixed-effects regression ('nlme') can be also retrieved. The
        package contains the crack.growth(), PLOT.cg(), IB.F(), and
        Alea.A (database) functions.
License: GPL (>= 2)
Encoding: UTF-8
Depends: R (>= 4.5.0), kerdiest, KernSmooth, nlme, parallel
Imports: MASS, mgcv, pspline, sfsmisc
LazyData: true
Config/roxygen2/version: 8.0.0
NeedsCompilation: no
Packaged: 2026-10-08 12:10:17 UTC; root
Author: Antonio Meneses [aut, cre], Salvador Naya [ctb], Javier
        Tarrio-Saavedra [ctb], Ignacio Lopez-Ullibarri [ctb]
Maintainer: Antonio Meneses <antoniomenesesfreire@hotmail.com>
Repository: https://1802515849.r-universe.dev
Date/Publication: 2026-09-28 08:20:08 UTC
RemoteUrl: https://github.com/cran/FCGR
RemoteRef: HEAD
RemoteSha: 81695a1f7454a9dfe134ea8d945b883dcad39e50