Constitutive compatibility based identification of spatiallyvarying elastic parameters distributions

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

The experimental identication of mechanical properties is crucial in mechanicsfor understanding material behavior and for the development of numerical models.Classical identi cation procedures employ standard shaped specimens, assume thatthe mechanical elds in the object are homogeneous, and recover global properties.Thus, multiple tests are required for full characterization of a heterogeneous object,leading to a time consuming and costly process. The development of non-contact, full- eld measurement techniques from which complex kinematic elds can be recordedhas opened the door to a new way of thinking. From the identi cation point of view,suitable methods can be used to process these complex kinematic elds in order torecover multiple spatially varying parameters through one test or a few tests. Therequirement is the development of identi cation techniques that can process thesecomplex experimental data.This thesis introduces a novel identi cation technique called the constitutivecompatibility method. The key idea is to de ne stresses as compatible with theobserved kinematic eld through the chosen class of constitutive equation, makingpossible the uncoupling of the identi cation of stress from the identi cation of thematerial parameters. This uncoupling leads to parametrized solutions in cases where5the solution is non-unique (due to unknown traction boundary conditions) as demonstratedon 2D numerical examples. First the theory is outlined and the method isdemonstrated in 2D applications. Second, the method is implemented within a domaindecomposition framework in order to reduce the cost for processing very largeproblems. Finally, it is extended to 3D numerical examples. Promising results areshown for 2D and 3D problems.

روابط وملفات

التعريف والنوع

رقم الوثيقة

f9f5494f-719f-4414-94e9-9148d3f8b8bd

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1700270_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"Lubineau, Gilles","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Moussawi, Ali","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Constitutive compatibility based identification of spatiallyvarying elastic parameters distributions

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Full-Field Measurment , Identification, Inverse Problem

إشراف وإعداد

الإشراف

Lubineau, Gilles

الإعداد

Moussawi, Ali

الاقتباسات الببليوغرافية