Comparison of Tangent Curve Method and Reciprocal Slope Transformation Method for Describing Mechanical Behaviour of Jatropha Curcas L. Bulk Seeds Under Compression Loading

Yıl 2014, Cilt: 10 Sayı: 2, 83 - 86, 01.04.2014

David Herak Abraham Kabutey Petr Hrabe

Öz

The study investigates the use of two different methods for the description of

deformation characteristics of Jatropha curcas L. bulk seed in linear compression. These methods

include the tangent curve and reciprocal slope transformation. The merits and limitations of both

methods were also compared. The different methods were used for development of mathematical

equations for fitting experimental data describing the mechanical behaviour of Jatropha bulk seed.

Pressing vessel diameter 60 mm was used to compress the bulk Jatropha seed which was

measured at pressing height 80 mm. For tangent curve method, the experimental data was fitted

by using the Marquardt Levenberg process whiles the Least Square Method (LSM) satisfies the

reciprocal slope transformation method. Statistical analysis of both experimental and fitted data

coefficients of reciprocal slope transformation and tangent curve methods indicated significant

results with high coefficient of determination which suggests the suitability of both methods for the

description of deformation characteristic of Jatropha curcas L. bulk seed in linear compression.

Anahtar Kelimeler

Oil bearing bulk seed, mathematical model, force deformation curve, Marquardt Levenberg Process

Kaynakça

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