"He was passionate about life,” [Librescu's son] said. “He had no fear of death.”

He said that his father was born in Romania in 1930. After surviving the Holocaust, Mr. Librescu said, his father became a refusenik in Romania and lost his job as an aerospace engineer. But in 1976, Liviu Librescu secretly published a book in Norway that advanced a theory of aerospace technology that grabbed the attention of others in the field. In 1978, after lobbying by groups in Israel, he was permitted to leave Romania and settle there. He began teaching at Virginia Tech in 1985, university officials said.

Mr. Librescu said that the bucolic environs of Blacksburg provided a respite from the rigors of his father’s earlier life. His house was built on the edge of a forest and he took long walks daily, enjoying nature. He listened to classical music and settled into the calm, productive rhythms of his new existence.