Módulo de rigidez de especies de madera de importancia comercial para México: Pinus pseudostrobus, Tabebuia rosea y Quercus scytophylla
Resumen
La madera es un material biológico con aplicaciones en ingeniería y arquitectura. Su módulo de rigidez es útil para el cálculo de vigas que trabajan en flexión y en torsión. El objetivo de la investigación fue determinar los módulos de rigidez y los índices materiales de Pinus pseudostrobus, Tabebuia rosea y Quercus scytophylla. Se realizaron pruebas dinámicas de torsión en 35 probetas de pequeñas dimensiones de cada una de las especies. Se calcularon las correlaciones lineales y sus coeficientes de determinación de los módulos de rigidez en función de la densidad y de la frecuencia. Los principales resultados son: Las magnitudes de las densidades de las maderas de P. pseudostrobus, T. rosea y Q. scytophylla se ubican al interior del intervalo: 587 kg m-3, 735 kg m-3. El coeficiente de variación de las frecuencias para Q. scytophylla es 50% menor comparativamente con los coeficientes de P. pseudostrobus y T. rosea. El coeficiente de variación para P. pseudostrobus es 23% mayor que el de T. rosea y 146% mayor que el de Q. scytophylla. Se concluye que los valores reportados en esta investigación pueden ser útiles si estas especies de maderas se utilizan con fines estructurales.
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Derechos de autor 2023 Javier Ramón Sotomayor Castellanos, Isarael Macedo Alquicira, Juan Zárate Medina
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