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Title page for ETD etd-08262008-153314


Type of Document Dissertation
Author Wang, Ping
Author's Email Address maverickwp@gmail.com
URN etd-08262008-153314
Title Dynamic Failure Mechanics Investigation on the Advanced Materials with Interfaces
Degree PhD
Department Civil Engineering
Advisory Committee
Advisor Name Title
Prof. Dechao Zheng Committee Member
Prof. L. Roy Xu Committee Member
Prof. P. K. Basu Committee Member
Prof. Sankaren Mahadevan Committee Member
Keywords
  • T stress
  • interface debonding
  • interfacial strength
  • Fracture mechanics
  • Composite mataerials -- Cracking
  • Laminated materials -- Cracking
Date of Defense 2008-08-26
Availability unrestricted
Abstract
Fracture and failure mechanics of advanced materials and structures with interfaces was investigated both experimentally and numerically. Dynamic fracture mechanics was used to model the phenomena when a main crack was encountering an interface. Critical dynamic fracture mechanics parameters of an infinitesimal kinked crack were determined through a relation of crack speeds, kinked angles and the other parameters of the main incident crack. Strength-based criteria were proposed to predict the interfacial debonding ahead of a main crack. In these studies, interface strengths were found to be crucial parameters for predicting crack propagation along the interface. Hence, a new specimen design to measure intrinsic interface strengths of dissimilar materials was performed, and accurate interfacial strengths were obtained.
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