Anisotropic mechanical behavior:
In many practical applications of synthetic polymers, molecular orientation is produced by the fabrication process to give improved properties, especially with regard to stiffness and strength. Well known examples are textile fibers such as nylon (Terylene), PP packaging films and polyester bottles. Most natural materials such as silk and cotton fibers, muscle and bone also show significant molecular orientation. All these synthetic and natural materials are anisoropic (their properties are different in different directions).
For anisoropic material:- ?_P= C_pq ?_q
?_(p )= S_pq ?_q
C = stiffness , S = compliance
C_11 C_12 C_13 C_14 C_15 C_16 Stiffness matrix or tenSor
C_12 C_22 C_23 C_24 C_25 C_26
C_13 C_23 C_33 C_34 C_35 C_36
C_14 C_24 C_34 C_44 C_45 C_46
C_15 C_25 C_35 C_45 C_55 C_56
C_16 C_26 C_36 C_46 C_56 C_66
S_11 S_12 S_13 S_14 S_15 S_16 Compliance matrix or tenSor
S_12 S_22 S_23 S_24 S_25 S_26
S_13 S_23 S_33 S_34 S_35 S_36
S_14 S_24 S_34 S_44 S_45 S_46
S_15 S_25 S_35 S_45 S_55 S_56
S_16 S_26 S_36 S_46 S_56 S_66
Orthor hombic symmetry:-j
Polymer films which were prepared by commercial drawing or rolling processes generally possess orthorhombic symmetry, which means that there are three orthogonal planes of symmetry.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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